Technical Car Experts Answers everything you need: gauges go erratic on dash

Sunday, June 17, 2012

2003 Pontiac Grand Prix: Erratic Fuel Gauge?

The Fuel gauge goes crazy and fluctuates up/down.Gauge goes erratic.

In this case first see the fuel in the tank.If the fuel level is low,then get the fuel filled at nearest gas station.

But if the GAS Tank is already full and you notice this frustrating problem then,
This is the same common problem for GM vehicles.Which many other GM car users are also noticing.
As per that it sounds very much like the Fuel Level Sensor is going to be the culprit.
For your car model the fuel level sensor is located inside the fuel tank.
The sensor is mounted to the side of the Fuel Pump Assembly. To replace this sensor,there is an access door located in the trunk, under the spare tire.
Instead of replacing the sensor directly carefully inspect the electrical connector and harness going to the top of the fuel pump assembly for any loose, broken or damaged wires. If the visual inspection checks ok, suspect a faulty Level Sensor.It has to be replaced.
See the help diagram shown below for parts location :-----

Pontiac fuel assembly parts

Please buy branded parts.They are costly but they give accurate performance and last long.Non-branded parts are cheap considered to branded original parts but many a times this local parts dont get detected,and you carry on replacing some other working parts.And at last one problem,gets to multiple issues.

This details will help.
Thanks.

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Wednesday, February 8, 2012

Mitsubishi Lancer rpm needle bounces?

The tach is driven by the ecu. A datalogger will tell you if the ecu is good or the guage has an issue. It could also be a loose connector. This has to be scanned by scan tool.

Try to reset your ecu, if that doesn't work, definetly take it to the dealer.

Just in case you don't know how to reset the ecu:

The procedure is as follows :----
1. Disconnect the neg terminal of your battery for 10-15 minutes
2. Plug it back on, start the engine and let it idle for another 15 minutes
3. Take if for a spin
4. Enjoy or bring it to your dealer .

The same problem was noticed by few of out customers, visited our garage.

In most of cases it was faulty MAF and in 2 cases it was loose connector issue.

It turned out to be my mass air flow sensor, the restrictor plate somehow came off, so right now i just glued it back on, it seemed to have solve my problem .

My friend use to drive one of those new Mitsubishi Lancers and was having the same problem, RPM neddle would bounce when stopped or was slowing down and it was very annoying. Come to find out that he had a faulty "MAS" (Mass airflow sensor)

He replaced it and it fixed the issue.

This will help.

Thanks.

See below related help solutions :----