And what it's doing is thinking, I'm out of fuel, I'm full of fuel, and it just bounces around pretty erratically. If you're just talking about the analog fuel gauge, my last two cars have been the same way. Remove a few screws below it and the sending unit can be removed. well my 1990's fuel gauge dosent work i remember that my friends 91 explorer had the same problem and i was wondering if it was a common problem and w Fuel Gauge problems - Ford Ranger Forum Ford Ranger Forum - Forums for Ford Ranger enthusiasts! > Ford Ranger Technical > Electrical Tech. please you cluster must be a lariet not a plain f150 must look just like picture below. I have the same problem. I've noticed in the past that the gauge would stay on full for a good many miles before starting its travel down to the empty mark, and thought that possibly I hadn't hit that milage mark yet. Resistance should range between 22. I have a 1988 Ford F150 with dual fuel tanks. The fuel gauge responds to the total resistance of the two sensors. Gas Gauge Stuck Past Full, Not Sending Unit nor Gauge I know this general issue has been discussed previously but I've done the test where I unplug the connector in the trunk, and clip the connector to a ground and its still stuck past full. Order Ford F150 Fuel Tank Sending Unit online today. Once the motor was stopped, the temperature gauge only returned to the middle of the gauge and is now stuck in that position. the bad news is the float and pump. 2010 Ford F-150 Best performance. If the gauge is not working, then the grounding wire needs to be replaced. It’s a good truck on par with the Ram or Chev. When the gauge reads empty it only takes approx. the gauge goes back to empty, when it is started the gauge goes to full. In the past, when I had used up around 60 litres of fuel, the gauge would be well in the red and the orange fuel light would turn on. I even tried using a jumper from the sending unit to the gauge using test leads. When the fuel level changes, the current also changes — higher currents mean the tank is full and lower currents mean the tank is moving towards empty. Re: Fuel Gauge Stuck as Full MH has it correct. If the wiring is intact, the gauge should peg (go all the way past full). The fuel gauge should immediately go to empty. 5" Duff Lift, 2" Body Lift, new paint, extended radius arms, 2 1/2 w/Flowmasters and headers. There is a pivot system with coil that connects the fuel gauge to the tank. I just purchased the truck about a. Fuel gauge stuck way past full - posted in Electrical: Hey guys, The fuel gauge in my lh is stuck way past full all the time. Filled up from 1/4 tank and took 24. 4 l leaks fuel out of the top of the fuel tank when filling, the fuel stations pump does not shut off when the tank is full causing gasoline to be spilled on the ground. I recently found out this is a common problem with these trucks. It the needle sticks then you have a gauge problem. So i took the car back. This video will show how to do this without dropping. With the tan wire disconnected at the fuel tank, the fuel gauge should read past full with the ignition on. The mech said he will check it and when i got the car back, the fuel gauge said 1/2 (which was about right). fuel gauge stuck on full after filling up the tank So I put a little bit too much gas in there a few days ago and after driving around 80 miles the needle still shows. EZAUTOFINANCINGNORTHFLORIDA, GAINESVILLE Florida auto dealer offers used and new cars. It only reads full at first I thought it was a stuck float and thought it had to fall down one day. I recently drove over 250 miles and the fuel gauge never moved a bit. Note that some self-test steps may stop the gas gauge at 1/4, 1/2, and 3/4, as well. 2011 Ford F-150 100% Guaranteed Bad Credit Auto Loan. While it is full, dump that cleaner in the tank. I have a 1987 Ford F250 inline six 4. It's stuck on the rear tank. We will assume a half-full fuel tank and that you have removed the float unit to check to see that it isn't stuck or that the wires haven't come loose. You fill up your gas tank, you turn on the ignition, but the fuel gauge needle doesn't move. And it took LOTS of fuel to fill the tank again. I have a 1988 Ford F150 with dual fuel tanks. There are a few things i know are the problem such as 1. The fuel gauge is ALWAYS full - boat off, battery switch off, cables from fuel baffle and even to gauge disconnected etc. So I look at the gas gauge and it says “full”. However, if you get a reading of between 96 to 98 Ohms, you. If you're just talking about the analog fuel gauge, my last two cars have been the same way. So when my mechanic was doing some other work on the engine, I asked him to change the temperature sending unit and. While out on the water sunday my fuel gauge stopped working. With over 25 computer controlled machining centers running around the clock, we have the equipment, the engineering know-how, and the workforce to handle any wheel you can dream up. Not fun when I didn't take any notice of the KM's I'd done and ended up on the side of the road with no petrol So on the way up the gauge worked fine, its just on the way back it is stuck on full. Have a 71 chevy nova, fuel gauge is stuck past full, when I ground out sending unit wire at the gauge it goes to empty, unhook ground jumper it goes back to full, same thing when I ground the connector in the trunk, it goes to empty then back to full when remove jumper wire. The Auto Fuel Controller, a DOT legal kit. Generally if you get stuck on full or empty you have either lost your positive voltage or are shorted to ground on the sender side or have a bad gauge. It had under half tank and we filled it. It worked fine for approx first 25 hours, but since then (52 hours now) it no longer indicates fuel use. i have an 89' f150 lariat, 4x4, strait 6, 4 speed. not sure whether to pull the dash apart and try to see if thats the problem or replace. After 4 years of ownership and 270 hrs the fuel gauge on my B3030 HSDC is now stuck on full. I installed a new tank and new sending unit, since I installed them my gauge doesn't read properly. Temp gauge not working not over heating 00 f150 4x4 4. The full level with a full tank goes past the full line on the gauge. If the fuel gauge does not respond properly when the sending unit is unplugged and with the circuits jumpered together, remove the anti-slosh module from the rear of the cluster and check for the gauge to peg past full with the cluster connector plugged back in and the. So any ideas on what to do?. Fuel gauge only reads full on 1993 ford f-150 how do you fix it? 25 26 27. Generally if you unplug the connector for the fuel sending unit at the tank the fuel gauge will read past fullcheck for a poor ground in the fuel sending unit circuit50/50 that or the sending unit for the fuel gauge has taken a crapnot a hard fix as you can unbolt the bed disconect the light connectors for the tail lights remove a ground or two and unbolt the fuel filler neck. The fuel gauge reading for MY01 and MY02 vehicles have a virtual calculation performed on the first 19 liters (MY02) or 7 liters (MY01) of fuel. If not, you have a wiring problem or a bad gauge. the ground wire under your console. Then you would want to get it checked out before any damage occurs. It was reading but only showed 3/4 tank when I topped it off. Hello, just bought my first truck and it has some minor problems. Turn the ignition to the on position and look at the fuel gauge. when i bought the truck the dealer told me that if its stuck on full its a fuse and if its stuck on empty its a sending unit. My Fuel gauge is Stuck Past Full. Exterior; Chrome front and rear bumpers; Conventional lens halogen bulb headlights; Courtesy lights; Gloss paint , black paint , metallic paint; Rear platform step; Heating, Venti. It runs from zero ohms at full to 240 ohms at empty. 1998 f150 4. The fuel gauge is stuck past the full mark although it looks good to always see a full tank its a little uneasy not knowing just how much fuel is in the tank. If your fuel gauge is stuck full or empty this video may help to see if the problem is with the gauge itself, the wiring, or the sending unit. Hey guys ive got the same problem alot of guys had, my fuel gauge is stuck on full all the time, it will go down when i turn the truck off but when i turn the truck on or start it, it shoots right up to full again, and also heres the other kicker, its been doing it since i got the truck, and the truck also came with another fuel gauge installed in the dash and it is stuck on empty, this is. But I'll give you good advice, install an in-line fuel pressure gauge (liquid filled). "On equipment that has not been used a whole lot, you could get a loose wire connection," says Kolbeck. I have driven 90 miles city so I know it's not full. So, malfunction could be caused by the breakage in any of the pivots that disconnects the information conveyance, or in the coil which prevents it from contracting as need. But, FWIW, if the previous owner or someone erroneously mismatched a Euro /metric fuel gauge ( 10 ohms empty 180 ohms full) with a US sender, grounding out the sender wire to test the gauge would push the gauge needle below empty , which is the opposite effect one would expect on a US standard gauge. Got the new sending unit installed this morning. When I statred the bronco the gauge was in the correct postion and when I put the bronco in reverse and back out the fuel gauge starts moving. My Fuel gauge is Stuck Past Full. The only wire is to the fuse block and on to the gauge. and gauge read full, and "miles to E" read 376 mi. In doing some more testing using resistors, at 56 ohms the gauge is 25% full, 106 ohms the gauge is 60% full and 156 ohms the gauge is 78% full. I changed the thermostat anyway, but it didn't make any difference. is it easier or harder than those gas tanks. With over 25 computer controlled machining centers running around the clock, we have the equipment, the engineering know-how, and the workforce to handle any wheel you can dream up. Generally if you get stuck on full or empty you have either lost your positive voltage or are shorted to ground on the sender side or have a bad gauge. If the fuel gauge reads full at all times, the probable causes are: • The wire between the sender and gauge is broken and/or the connections are not good. Fuel guzzling beast 97 F350 crew cab 4x4 460, I've lost the fuel gauge on the front tank only, just reads empty always, rear tank guage works fine. 3L PowerStroke, ZF5 Manual So my fuel gauge is stuck way past full, switch tanks and it doesn't move, run it to empty and fill up, doesn't move. My fuel guage is not working properly. The drivers side then goes to the passenger side in a yellow/black wire. Weather stripping tends to leak near rear windows. I got in my sedan the other day and as soon as I turned the key the fuel gauge pegged to full even though the tank was not full. 1990 Ford F150 Stuck fuel gauge on 3/4ths full and rear gas tank not working. 2 xl I have repl. I have a 93 Bronco and the fuel gauge will go all kinds of crazy it will go from empty to full to way over full to anywhere in between while sitting still idling. The gauge reads pegged to the right, way past full with key in either position. Expecting fuel price to drop I only put in 10 gallons for my round trip back home. I therefore have 10 gallons left in the tank when the gauge reads empty. I usually top up the tank after each use, but last time I decided to let it run down pretty low without refillingI'd say down to about. Fuel line goes into the fill tube from the bed tank. The gauge should never read very high when you're not driving because the engine should be fairly cool due to inactivity. Fuel Level Gauge Stuck At Empty Now about a week before this happened I used an "add-a-circuit" to hard wire my radar detector into my accessory spot in the driver side fuse box. I have a 97 F150 and it wont start. The dealer checked the sending unit and the float and reported that everything was working but the gauge was still not registering the accurate level of fuel. The fuel gauge works off a basic system that requires three inputs: 12 volts, Ground. It always stays past the full mark even when it is bone dry. When I Was Told That. As with most sensors, the tank sending unit is simply a variable resistor. A few cosmetic things that are pretty normal for a 16 year old car. Understanding how they work makes it much easier to diagnose problems. E is still working though. MG MGA Fuel gauge only shows half full BBS discussion at MG-Cars. It remained just above "Full" the entire trip. The problem with my Ford F 150 1994 300 engine with 6 cilinders is that the oil indicator needle started moving up and down until it drops completely. It's an autometer fuel gauge and american autowire. After I had put anew fuel pump in the fuel gas meter has been stuck past full for a few days 1990 Suburban V1500 gas gauge not working. No idea how it's calculating this value though. I think Valvoline might make it. The truck was undercoated from the factory, so the undercarriage is in excellent shape. But yesterday it didnot stop even when the tank got full and the petrol started falling on the floor. Or it may be a faulty gauge or a break in the wiring between the gauge and sender. I'd start with the wiring. The vacuum gauge can also diagnose improper valve timing, burned or stuck valves, sticking choke, leaking manifold, improper fuel mixture and more. Make sure it is free to float up and down and not stuck. Fuel Gauge stuck on empty even though there's fuel ?? Hey guys! So yesterday I am driving, have about half a tank of fuel and next thing the fuel gauge just drops to empty and the red "low on fuel" light goes on. It's stuck on the rear tank. Fuel gauge is maxed out no matter which tank is selected. Went and filled my tank up and it appears the gauge works. How do i fix this? anyway to check it and see whats wrong, it was working perfectly fine, till i topped it off with gas (just got the car 2 weeks ago) and since then its been stuck on full. Hi everyone, Over the weekend I drove my 1. Pick this stuff up and go fill up your tank FULL, fuller than you have ever filled it before (but dont overfill). Any ideas?. any ideas?. My fuel gauge is stuck on full (main tank), it would be great if that meant my fuel tank magically filled itself with diesel but not the case. Hello, just bought my first truck and it has some minor problems. This problem is solved by replacing the gauge cluster. If you DO have 12 volts to the fuel gauge, the next step is to remove the fuel sending unit wire, and, with the ignition key “on”, ground the sender wire to a good chassis ground. It runs from zero ohms at full to 240 ohms at empty. Total reports: 8. Fuel Level Sender. As you can see from the pics the gauge reads full when the truck is off and way past full when the truck is running. The fuel gage circuit consists of the sending unit in the fuel tank, the gauge in the dash, and the wiring and dash wiring (or circuit board) between them. If grounded, the gauge will read something (between halfway and full) depending on the drivers side sender. I even tried using a jumper from the sending unit to the gauge using test leads. I'd be getting the dealer to show me some special help with this, if I was the one that ran out in the. The gauge should never read very high when you're not driving because the engine should be fairly cool due to inactivity. I've had my boat a whole 4 days now and I've noticed my fuel gauge is off. This video will show how to do this without dropping. Check out free battery charging and engine diagnostic testing while you are in store. The rear gauge does workand works normally. January 5, 2018 - With gas prices rising, filling your tank might make you wish for better fuel economy or a smaller gas tank, especially if you drive the 2018 Ford F- 150's 5. Fuel guzzling beast 97 F350 crew cab 4x4 460, I've lost the fuel gauge on the front tank only, just reads empty always, rear tank guage works fine. UPDATE: Patiently waiting for the fuel gauge needle to move is not working. So i had a warranty issue with my fuel pump and it got replaced. As the tank is currently full, I won't be able to truly test it until I hit the road in Feb. The fuel gauge diagnostics on all cars 1977-1982. We have been keeping track of the miles but honestly I would rather just get it repaired. I've got a 1994 Wrangler and the fuel gauge always reads full, even when I disconnect the sending unit/fuel pump connector. Touch the tan wire from the body to any convenient ground and the gauge should read empty. 8 why would fuel gauge peg past full? it went past full it has less than half tank. However, the fuel gauge is just the indicator; behind it is the vehicle’s fuel delivery system, and a major component of that system is the fuel sending unit, which measures and then sends the fuel gauge on your dashboard information about the tank’s current fuel level. that applying voltage to pin 2 would cause the fuel gauge to shoot up to full but it still sat at empty. well my 1990's fuel gauge dosent work i remember that my friends 91 explorer had the same problem and i was wondering if it was a common problem and w Fuel Gauge problems - Ford Ranger Forum Ford Ranger Forum - Forums for Ford Ranger enthusiasts! > Ford Ranger Technical > Electrical Tech. symptom of an issue with the fuel gauge sender is a fuel gauge that is stuck on full. In the past I fixed the fuel baffle problem in a 2 stroke speedster - however this seems completely different. January 5, 2018 - With gas prices rising, filling your tank might make you wish for better fuel economy or a smaller gas tank, especially if you drive the 2018 Ford F- 150's 5. In the past, when I had used up around 60 litres of fuel, the gauge would be well in the red and the orange fuel light would turn on. As you can see from the pics the gauge reads full when the truck is off and way past full when the truck is running. I recently drove over 250 miles and the fuel gauge never moved a bit. i have an 89' f150 lariat, 4x4, strait 6, 4 speed. Obviously, at that point, I have to switch back to the other tank. Drives the vehicle and refills the tank before the Fuel Gauge drops below Full) 2. My fuel gauge only reads full. Fuel gauge stuck way past full, and only pulling fuel from the front tank, eventhough rear tank was selected? 1997 Ford F350, 7. Replaced gauge with gauge out of 85 truck same thing. now my fuel gauge hasn't moved past the full line and i've been driving since i filled up. Here's how the fuel gauge works: The fuel gage circuit consists of the sending unit in the fuel tank, the gauge in the dash, and the wiring and dash wiring (or circuit board) between them. Footer, 1999 ford f150 fuse diagram 1999 f150 relay starting issue, 1999 ford f150 fuse diagram Navbar Menu, 1999 ford f150 fuse diagram 1999 f150 relay starting issue, 1999 ford f150 fuse diagram. First day I started with 3/4 full tank ran it down to about 1/4 tank. How do i fix this? anyway to check it and see whats wrong, it was working perfectly fine, till i topped it off with gas (just got the car 2 weeks ago) and since then its been stuck on full. the gas gauge stays past full, way past full. Now the fuel gauge only goes to a quarter, and will not indicate 3/4 full. 2018 Ford F-150 Diesel Review: How Does 850 Miles on a Tank Sound? We put the most fuel-efficient truck you can buy through a full-tank range test—and the result is pretty damn impressive. The F-150 Raptor experience begins with its rugged suspension. the gauge goes back to empty, when it is started the gauge goes to full. Fuel Level Sender. switch to front tank and its pegged. I discovered that the fuel gauge is not working. The gauge should read full nuts full. It began to migrate clockwise. ? i filled up my truck, but i put to much on and the tank became over filled. My fuel guage is not working properly. The signals from the sending units to the module and from the module to the fuel gauge are square waves on this system. If the wiring is intact, the gauge should peg (go all the way past full). Temp gauge not working not over heating 00 f150 4x4 4. If the pressure is too high with the manual gauge, then you have some sort of internal engine problem or an oil pump problem that should be looked into. The gauge would read full when the tank was filled but only drop to a point just below the 3/4 mark and stay there. Troubleshooting Your Chevy Truck Gas Gauge Failure. The fuel gage circuit consists of the sending unit in the fuel tank, the gauge in the dash, and the wiring and dash wiring (or circuit board) between them. The gauge should never read very high when you're not driving because the engine should be fairly cool due to inactivity. any help will do, thanks btw, the car is a 1995 240sx SE 5spd. This is my firsttime posting on his website and hopefully I can explain my problem accurately. This video will show how to do this without dropping. Like a GM gauge is 0-99 ohms. After fueling the gauge was in the same positon and the low fuel light was still on. I drove to the nearest station but was able to put only 10 gallons in a 30 gallon tank. Shorting the fuel gauge wire makes the gauge read past empty, an open circuit makes the gauge read past full. Re: Fuel Gauge, please view and reply On our 01 Deville DTS, we have the same issue that is when the fuel gets low. 2 days later i filled it up. Wiring has been checked and verified that is correct. When i originally bought the truck the gas gauge would only accurately work above a half tank. This problem is solved by replacing the gauge cluster. While new car prices clearly inlude VAT used prices are driven by supply and demand. fuel tank gauge (front tank setting) to drop off the full mark (actually the gauge needle goes slightly beyond full) but it had not dropped. My car has 98000 miles. Customer stated that fuel gauge always reads full but the. for example, recently the tank took 10 gallons even though the fuel gauge registered full. Brought a 986 home today for dad. To test the gauge, pull the center terminal off the fuel tank sending unit and attach a jumper to it and ground this jumper. 1998 f150 4. While it is full, dump that cleaner in the tank. The gas gauge for the front tank on my 1992 F150 is stuck past full You probably have a ground wire not making contact to ground on the front tank sending unit. 2004 GMC Sierra. Fuel Gauge Is Stuck Past Full. We pitted the F-150 against the current Ram, Tundra and Silverado in a full-size pickup comparison test, and the F-150 came in last. Average repair cost is $880 at 27,450 miles. EZAUTOFINANCINGNORTHFLORIDA, GAINESVILLE Florida auto dealer offers used and new cars. Like a GM gauge is 0-99 ohms. Another common oil pressure gauge problem is a reading that's too high when your engine is idle or when it's turned off. I know the gauge still works because the low fuel light still comes on when i'm almost out, i just can't tell how much gas i have before then?. The gauge is past the full mark because there is NO power to the sending unit. FUEL GUAGE NOT WORKING discussion in the John Deere forum at Yesterday's Tractors. Such a situation can be a total loss in case you are on the countryside going for a long drive. For some reason, the fuel gauge always reads way beyonf "FULL" And the gauge doesn't move, no matter how much gas is in the tank. No matter what, the needle is always the way up and never moved. I think Valvoline might make it. A failing Ford F150 Fuel Level Sending Unit will provide inexact levels, and cause the vehicle to run out of fuel. soaked in pb blaster and still won’t come. The signals from the sending units to the module and from the module to the fuel gauge are square waves on this system. I tried your suggestion and the fuel gauge still moves from where the fuel level should be and past full and back again. I removed the sending unit and tested the float in a bucket of diesel fuel and it moves freely up and down. I have a 2008 civic coupe EX, and recently filled up in Oklahoma and noticed: 1) the pump at the service station was running very, very slow and 2) the pump also recorded about about a. the gas gauge stays past full, way past full. Ironhorse Auto Inc. Any suggestions. This curve correlates the position of the float with the volume of fuel left in the tank. being that it stuck on full its not a fuse because i checked every single fuse in my truck. Fuel Gauge Pegged at Full Replaced the sender a few weeks ago, and it seemed to be working great (had about 3 gallons and showed around 1/4 tank). for example, my honda aviator has a total capacity of around 6 liters, and i fill it up when it reaches the inside of the red section of the gauge near "empty". This gauge will give you accurate readings of your air/fuel mixture, but if you are really looking to really tune your vehicle we recommend. the gas gauge is stuck on full. Perhaps it's stuck somewhere around halfway (maybe the float isn't, but the tiny rheostat inside could be). The problem with my Ford F 150 1994 300 engine with 6 cilinders is that the oil indicator needle started moving up and down until it drops completely. I called the auto parts store they said it's my fuel sending unit and I'm looking at $400. note how the pointer needle for the speedometer is stuck at 105 mph with the vehicle parked and the key out of the ignition. My car has an automatic transmission. I've noticed in the past that the gauge would stay on full for a good many miles before starting its travel down to the empty mark, and thought that possibly I hadn't hit that milage mark yet. Free shipping US Orders +$99!. In our case for the Deville it happens to be that we need to change the actual fuel level sensor mechanism arm inside the fuel tankwhich is malfunctioning. 1992 Ford F-150 Gas Gauge. Generally if you unplug the connector for the fuel sending unit at the tank the fuel gauge will read past fullcheck for a poor ground in the fuel sending unit circuit50/50 that or the sending unit for the fuel gauge has taken a crapnot a hard fix as you can unbolt the bed disconect the light connectors for the tail lights remove a ground or two and unbolt the fuel filler neck. They came back to fix it and now it's stuck on the 1/2 mark. With the tan wire disconnected at the fuel tank, the fuel gauge should read past full with the ignition on. Ok, i have a 1988 E. 3 V8 - Filled my gas tank the other day and when I jumped back in to the truck the fuel gauge was way past full and pointing down to about the 5 o'clock position. I have driven 90 miles city so I know it's not full. not sure whether to pull the dash apart and try to see if thats the problem or replace. Try grounding the wire at the sender and have someone watch the gauge with the key on. Fuel gauge only reads full on 1993 ford f-150 how do you fix it? 25 26 27. How can I find out if the problem is in the tank,or the dashboard. 5 ohms empty and 145 ohms full. Many suggested a float stuck or sending unit sticking. When i originally bought the truck the gas gauge would only accurately work above a half tank. IIRC an open circuit will cause the fuel gauge to default to full. Problem with gas gauge. any or all. Resistance should range between 22. I tried your suggestion and the fuel gauge still moves from where the fuel level should be and past full and back again. When the vehicle is filled prior to depleting the gas tank to these levels, an offset is calculated and stored in the instrument cluster memory. The fuel gauge jumped up a lot with little fuel being added. Any knowledge would be much appreciated. However a full tank of gas put the fuel gauge about 1/2" past the full mark. It'll save you from guessing on your problem as to fuel pressure and clogged lines or filter. The heater produces hot air no problem. Any ideas?. I installed a new fuel sender 2 years ago, since then, the gauge would only go as far as 1/4 tank no matter how full it was, after a year, I pulled the sender ( forget I already replaced it) & Installed Another NEW sender (checked it for 0-90 before installing it) STILL, the gauge will go no higher than 1/4 !. The sending unit was worn and the brush contacts were not making full contact. The gauge isn't linear from what people are reporting in other places I would say that if you've driven 4000 miles and the gauge is showing 7/8 full then the gauge isn't working properly. As your gas tank is drained of fuel, the float drops and an electrical current is sent to the gauge to tell the driver what's going on with the supply. I removed the sending unit and tested the float in a bucket of diesel fuel and it moves freely up and down. While it is full, dump that cleaner in the tank. After connecting the battery, I then connected both sides of connector C502 (fuel pump/sender module to the chassis harness) while the module was still out of the tank, and then turned the key on to check for Fuel Gauge movement. Drives the vehicle and refills the tank before the Fuel Gauge drops below Full) 2. Read this oneHOWTO article to know why is my fuel gauge stuck on empty. It is stuck above full. Repair and Diagnosis of Problems with Your Imperial's Gauges My fuel gauge reads full 24/7 with If the gauge does not go up to or past full then you know the. The average cost for a Ford F-150 fuel level sending unit replacement is between $602 and $856. did you just replace the fuel pump cause if you didnt put the pump in right it will end up hanging up inside the tank. like it has mind of his own. Hopefully by following the suggestions on this publication, you will be able to diagnosis any dash gauge problem and/or a problem with your gas tank sending unit problem. 5 ohms empty and 145 ohms full. Touch the tan wire from the body to any convenient ground and the gauge should read empty. Then I look at the fuel tank switch, and the gauge is switched to the aux. Brought a 986 home today for dad. I ordered the fuel gauge that was supposed to go with that sender so why is it reading ful and how can I fix it? I leave for The Roundup on Wednesday!. I have found the fuel sender and when i unplug it (with ignition on) the fuel gauge drops to empty. 1995 Ford F150 6 cylinder 4. In the past I fixed the fuel baffle problem in a 2 stroke speedster - however this seems completely different. 8 why would fuel gauge peg past full? it went past full it has less than half tank. £40 later it still hadnt clicked (usually from half it takes about £25 - £30) which made me raise an eyebrow. Remove the tank cover and locate the thingy with all the wires and hoses going to it. We will assume a half-full fuel tank and that you have removed the float unit to check to see that it isn't stuck or that the wires haven't come loose. Removing the sending unit wire from the chassis ground the fuel gauge should go directly to "full". And it took LOTS of fuel to fill the tank again. My truck that I recently bought had a broken fuel gauge which was stuck past full. No matter what, the needle is always the way up and never moved. While I haven't yet been able to confirm how the 97 fuel gauge system works, in later systems the gauge indicates EMPTY when the total resistance is highest (around 100 Ohms) and indicates FULL when the total resistance is lowest (somewhere around 5 Ohms). In the past the fuel gauge had always been pretty accurate. Any ideas?. How do i fix this? anyway to check it and see whats wrong, it was working perfectly fine, till i topped it off with gas (just got the car 2 weeks ago) and since then its been stuck on full. A bit below the 1/4 mark the low fuel light comes on. Obviously, at that point, I have to switch back to the other tank. Aftermarket performance auto car parts company & vehicle gauge manufacturer. I know the gauge still works because the low fuel light still comes on when i'm almost out, i just can't tell how much gas i have before then?.