Question about 2002 Ford Windstar Cargo

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Fuel level gauge

The fuel level gauge sometimes reads empty then full. We have replaced the fuel sending unit pump assembly, but it still has the same problem occuring.

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Some of this vehicles have a computer system, that will allow you to diagnose the fuel gage with an aftermarket sacan tool,
than most of auto repairs have, but i will recomend you to check also the conector by the fuel pump and make sure there is not any corosion or melting circuit inside the conector,

what the scan tool does is triger your gage and that way you will know if you have a bad gage.

Posted on May 28, 2008

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1 Answer

Fuel gauge reads correctly then goes to empty


9 times out of 10 the fuel pump/level sender assembly is the cause. Sometimes the gauge pod is faulty, and there have been cases where there were either poor connector pin fit issues and/or chaffed/melted/cut wires in the harness that leads back to the fuel pump. It is an extremely common fault and would be surprised if the pump/level sender assembly wasn't the cause.

I hope this info helps!
~subyguru~

Sep 21, 2012 | 1999 Pontiac Grand Am GT

1 Answer

Put in new fuel pump and sending unit. but my gas gauge doesnt always work. sometimes is does and sometimes it doesnt


if it worked for a short period of time after doing the pump/sending unit the check the connections going to the pump/sending unit they would have been moved around doing the pump

Aug 11, 2012 | Cars & Trucks

1 Answer

1996 ford f150 front gas tank gauge reads empty but tank is full pump in front tank was replaced about a year ago what could problem be


When pump was replaced, did you also replace sending unit? It is usually a good idea to replace sending unit when replacing pump. The sending unit also "sends" information about the fuel level to your fuel gage. It is also possible the float on the sending unit is stuck in the low fuel or empty position on the sending unit. Although on some vehicles you can replace individual parts of the fuel delivery system, it is usually a good idea to replace all the internal parts of the sending unit assembly at the same time. After all, most fuel tanks can be a real pain to gain access to the inner workings of the fuel delivery system, so why take the chance of having to gain access again.
Good luck.

Jul 23, 2012 | 2005 Buick Terraza

2 Answers

Fuel gauge non Digital car does check system then while sitting it goes from full tank to empty and no reading's in between.


This problem is caused by a defective fuel gauge level sending unit, the sending unit is located inside the fuel tank and is part of the fuel pump assembly (known as the fuel pump module) and not sold separate from the fuel pump. To replace the fuel pump module you must remove the fuel tank from the car.

Apr 19, 2011 | 2004 Pontiac Grand Prix

1 Answer

Gas gauge sometimes reads empty and sometimes full even if tank is full


I'VE HAD MY GOOD SHARE OF THESE PROBLEMS WITH GM PRODUCTS. 100% OF THE TIME THE FUEL LEVEL SENDING UNIT ON THE SIDE OF THE FUEL PUMP IS THE PROBLEM. IT IS VERY COMMON ON THESE CARS. ONLY WAY TO FIX THIS IS TO REPLACE THE FUEL PUMP, WHICH COMES WITH A NEW SENDING UNIT, UNLESS YOU CAN FIND THESENDING UNIT SEPARATE. I WOULDN'T RECOMEND THE LATTER THOUGH, AS IT IS MOST LIKELY THAT THE PUMP WILL BE THE NEXT TO GO.

Jun 08, 2010 | 2000 Chevrolet Venture

1 Answer

Signifique code p-1627


Trouble code P1627 means: PCM A/D Conversion Malfunction

This is a fuel sending unit code and it directly related to you goofy gas gauge. This is a common problem in 2nd Gen Isuzus. The fuel sending unit needs to be replaced. Most places will tell you that you must replace the entire fuel pump assembly module but you can buy just the sending unit.

Other faults to refer this problem and other c
odes: P0141, P0300, P0404, P1404, P1627, with this synthoms:
hesitates sometimes on takeoff, gas gauge gives random readings(sometimes will read empty, or full, or somewhere in between), Fuel light flashes sometimes.

Hope helps.

Mar 16, 2010 | 2000 Isuzu Rodeo

2 Answers

Gas gage read full when empty and sometimes emty


You have a bad fuel level sensor.The fuel tank needs to come out and the sensor replaced.You don`t have to replace the pump assembly.You can get the level sensor separate.I`m not sure if the parts stores have it but I know the dealerships do.Hope this helps.Good luck.

Mar 16, 2010 | 2004 Pontiac Montana

2 Answers

My 2000 Chevy Impala fuel gauge reads empty.


sending unit on fuel pump is bad, the sending unit shorts out gauge will go to empty or full, never read right, turn on switch ,it goes to full or empty, ,check the pump,hope this helps,thanks robert b.

Jun 27, 2009 | 2000 Chevrolet Impala

2 Answers

Fuel gauge not working all the time.


This is a normal concern.
The instrument cluster uses 4 different operating modes to calculate the fuel level:
Anti-slosh (default mode)
Key OFF fueling
Key ON fueling
Recovery
After a fuel fill up, the time for the fuel gauge to move from empty (E) to full (F) ranges from 2 seconds to 55 minutes depending on which operating mode the fuel gauge is in.
The default fuel gauge mode is called the anti-slosh mode. To prevent fuel gauge changes from fuel slosh (gauge instability due to changes in fuel sender readings caused by fuel moving around in the tank), the fuel gauge takes approximately 55 minutes to go from empty (E) to full (F).
The key OFF fueling mode (2 seconds to read empty [E] to full [F]) requires 3 conditions be met:
The key must be in the OFF position throughout the entire refueling of the vehicle.
At least 15% of the vehicle's fuel capacity must be added to the fuel tank.
The instrument cluster must receive a valid key ON fuel sender reading within 1 second of the key being put into the RUN position. The key ON sample readings are considered valid if the fuel sender reading is between 15 ohms ± 2 ohms and 160 ohms ± 4 ohms.
If these conditions are not met, the fuel gauge stays in the anti-slosh mode, which results in a slow to read full (F) event.
The key ON fueling mode (approximately 90 seconds to read empty [E] to full [F]) requires 3 conditions be met:
The transmission is in PARK (P).
The key is in the RUN position.
At least 15% of the vehicle's fuel capacity must be added to the fuel tank.
In key ON fueling mode, a 30-second timer activates after the transmission is put into the PARK (P) position (automatic transmissions). When the 30-second time has elapsed and at least 15% of the vehicle's fuel capacity has been added, the fuel gauge response time is 90 seconds to read from empty (E) to full (F). When the transmission is shifted out of PARK (P), the fuel gauge strategy reverts to the anti-slosh mode. The key on refueling mode prevents slow to read full events from happening if the customer refuels the vehicle with the key in the RUN position.
Recovery mode is incorporated into the instrument cluster strategy to recover from a missing fuel level input during a refueling event. Missing fuel level inputs result from intermittent opens in the fuel sender or its circuits. Recovery mode (empty [E] to full [F] approximately 20 minutes) is initiated when the following 2 conditions are met:
The instrument cluster is in the anti-slosh (default) mode.
The actual fuel level in the tank is greater than what is being displayed by the fuel gauge

Feb 18, 2009 | 1983 Mercury Grand Marquis

1 Answer

1989 Saab 900 low level fuel light


You don;t say whether the fuel gauge is reading accurately, or whether it's always on empty. If the gauge is always showing empty, it's most likely a problem with the sending unit in the fuel tank. Check the resistance across the two terminals of the sending unit.

On a C900, the fuel sender level unit is separate from the fuel pump and located on the right side top of the tank, accessible by removing the trunk floor lift up panel (the pump is located on the left side top of the tank.
Possible problems are: electrical line off or broken, float not working (it's fairly delicate); or gauge not working.

Test the resistance of the sending unit with the lines disconnected, the resistance should be 2.6 to 3.8 ohms full tank, 63.3 to 67.5 ohms empty tank; and test for voltage across the top of the sender unit, if no voltage, that's likely the problem!

If the gauge is otherwise reading accurately (showing 'full' for a full tank, etc) then the problem is likely a gauge malfunction and can be simply replaced.

Good luck!

Saabreur

Jul 10, 2008 | 1989 Saab 900 4 Door

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