Question about 1996 Mercury Cougar XR7

1 Answer

Fuel Gauge reads full all the time and the Low Fuel Indicator is on all the time. Just replaced the complete fuel pump and level sensor with a new Airtex unit. Car starts and runs better but did not fix the fuel gauge issues.

Posted by on

  • rfatheree Oct 03, 2010

    Thanks Tim. That site was very helpful. We are checking for a short in either the wiring or the gauge. Pretty sure we have a bad gauge now.

  • Anonymous Mar 17, 2014

    fuel gauge reads full all the time

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 3,074 Answers

Sounds like it is not hooked up or not correctly. I would double check the connection on the fuel pump. Hope this helps tim

Posted on Oct 03, 2010

  • rfatheree Oct 03, 2010

    It was doing the same thing with the original fuel pump and sending unit. That is why I changed it thinking the sending unit was bad. Connections are fine - the fuel pump works and it is the same connector for both.

  • Tim Whalen Oct 03, 2010

    check this website out:http://www.aa1car.com/library/fuel_gauge...

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My gas gauge in my 2002 Pontiac Bonnivile shows empty all the time


Fuel Gauge Troubleshooting

Fuel Gage
The IPC displays the fuel level as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the fuel level percent. The fuel gage defaults to empty if:
• The PCM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of class 2 communications with the PCM.
When the fuel level is less than a pre-determined value, the CHECK GAGES indicator illuminates.
DTC P0462
The fuel level sensor changes resistance based on fuel level. The PCM monitors the signal circuit of the fuel level sensor in order to determine fuel level. When the fuel tank is full, the sensor resistance is high and the PCM senses a high signal voltage. When the fuel tank is empty, the sensor resistance is low and the PCM senses a low signal voltage. The PCM uses the signal circuit of the fuel level sensor in order to calculate the total remaining fuel (%) in the tank. The PCM sends the fuel level percent via the class 2 serial data circuit to the IPC in order to control the fuel gage. The fuel level information is also used for misfire and EVAP diagnostics
DTC P0463 (3.8L)

How to test fuel gauge tank sending unit P0463 GM

Mar 29, 2017 | 2002 Pontiac Bonneville

1 Answer

05 h2 hummer replaced fuel pump and gauge worked for 1 day and back to reading over full again... what else can it be???? plus changed plugs and wires on hummer and still read misfire and i put in an oem...


A misfire could be caused by a bad , clogged fuel injector . A vacuum leak . How are you reading a misfire ? A code ? A dirty mass air flow sensor can cause misfires . Low fuel pressure ,clogged fuel filter . When you replaced the fuel pump did you replace the ceramic sending unit resistor card with a new one ?
Fuel Gage
The IPC displays the fuel level as determined by the PCM- engine computer. The IPC -instrument panel cluster receives a class 2 message from the PCM indicating the fuel level percent. The fuel gage defaults to empty if:
?€¢
The PCM detects a malfunction in the fuel level sensor circuit.


?€¢
The IPC detects a loss of class 2 communications with the PCM.

When the fuel level is less than a pre-determined value, the low fuel indicator illuminates.
Reviewing the fuel system description will further explain how the system functions. Refer to Fuel System Description .
Do you know about class 2 serial data communication .
Do

Dec 23, 2016 | 2005 Hummer H2

1 Answer

Check engine lite on. car reader indicator ( PO463 fuel level senor circuit high input). Feuel gauge do not work proper, give a false reading with a full tank.


my wifes truck has same problem, better off changing the whole fuel pump. the fuel level sensor is on the casing for the fuel pump. mine as well replace pump since you have to drop the tank anyway. before you order one, check on the drive side door jam to see what month you axiom was built. this is an important factor in ordering your fuel pump. sounds stupid i know but trust me. alot of parts for the axiom depend on the month.

Sep 17, 2011 | 2002 Isuzu Axiom

2 Answers

On my 99 taurus I have two problems.first the fuel gauge isn't reading accurately,it stayin at 3/8 full.along with that gauge the temp gauge isn't moving it stays at cold.second major problem it...


You might have to get the fuel pump out of the tank and clean the patenchio meter which moves up and down, clean it with an eraser on the end of the pencil for best results.
As for the temp guage, check the temp sensor it might have grounded.
Strange whining could be from the loose belt check tensioner, power steering pump for pressure, sterring rack might be seasing/leaking internally.

Aug 19, 2011 | 1999 Ford Taurus

1 Answer

Fuel gauge reading half with full tank on 1997 Mitsubishi Mirage


It is a fuel gauge sensor also known as the level sensor, There is a level sensor that has a boot spring attached to it that is probraly jammed, or just simply damaged. This will need to be replaced, you can located this at your fuel pump, which in normal case is underneath you rear seat in which side is your fuel door is located. Once you located the opening of the fuel pump passage then there is normally 6-8 small bolt that is screwed to hold your fuel pump to the fuel tank and some cable harness. Theses will need to be taken off in order for you to take your fuel pump. In my best advice, you minus well replace your whole fuel pump system to save time and complication when installing

Jan 21, 2011 | 1997 Mitsubishi Mirage

1 Answer

Fuel gauge is not reading at all even though there is fuel in gas tank?


check first the guage indicator,,,if its good,,, full down the fuel tank and check the fuel gauage sending unit(fuel level sensor) is attached to the to the fuel pump control module..

Jun 28, 2010 | 1998 Jeep Cherokee

1 Answer

GMC envoy after I filled gas tank the low fuel light came on and as I was driving it would go off than come back on after a few miles the check engine light come on stayed on and the low fuel light still...


You will need to replace the fuel level sensor which is in the fuel tank.They have a lot of problems because the metal fingers on the sensor wear off and gives you the incorrect readings.This will also cause the check engine light to come on.You will probably have a level sensor code.This will be a lot easier if the fuel level is down to about a quarter tank or less.Also you should be able to get just the level sensor and not have to get the complete fuel pump module.Good luck.

Dec 02, 2009 | 2005 GMC Envoy Xl

1 Answer

Gas gauge reads full when underway. However, when


Most likely it a bad fuel level sensor on you fuel pump. You will have to replace the fuel pump as that is the only way to replace the sensor for you fuel gauge. The sensor is built into the fuel pump. The contacts on the sensor become corroded over time and cause the sensor to malfunction causing your fuel gauge to read full all the time. I have a 2001 Montana extended version that had the same problem. In order to know when I needed to fill the tank, I would completely fill it each time I put fuel in and reset my trip odometer. I would go 400 miles on the tank before I would refuel until we were able to replace the fuel pump.

Oct 30, 2009 | 2000 Pontiac Montana

1 Answer

2000 Silverado fuel gauge shows empty at fill up. At 3/4 or less it will sometimes indicate correctly then fall to empty causing the "low fuel" indicator to display.


Bad fuel level sensor. Depending on miles go ahead and replce fuel pump its got to come out anyway to replace level sensor.

Aug 05, 2009 | 2000 Chevrolet Silverado 1500

1 Answer

Fuel indicator


OK, your fuel indicator is wired to a sending unit that is located inside the fuel tank. this assembly is part of the fuel pump assembly. the fuel indicator sending unit is housed in the same assembly as the fuel pump. The fuel indicator will not function properly if there is a bad ground or, if there is a fault within the sending unit. there is a floater device attached on this assembly and, it raises with the fuel level and lowers when the fuel level is low, sending resistance signals to the indicator gauge on your dash board. these signals can be disrupted if the ground is corroded or, if the sending unit is damaged. In most cases, replacing the sending unit will fix this issue. if the fuel indicator is stuck on the full mark, check the ground. if the fuel gauge is laying on empty all the time, replace the sending unit.

Jun 10, 2009 | 1996 Toyota Camry

Not finding what you are looking for?
1996 Mercury Cougar XR7 Logo

Related Topics:

327 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercury Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

fordexpert

Level 3 Expert

5546 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Are you a Mercury Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...