Question about 2002 Pontiac Grand Am
It was driving fine and then it started acting like it was running out of gas but jerking worse than if it was out of gas, like its not running off all cylanders. but when put in neutral it idles fine. i right away took it to the part store. when i got out smell of gas was very strong. the guys hooked it up to the diagnostics computer and said it didnt run any codes that would cause this problem. plugs and wires are fine, fuel filter and pump good, coil packs good, used fuel injector cleaner and gas treatment as well. please help we are baffled
The petrol smell could from a faulty canister purge valve or EGR valve That would also account for rough running as the tank venting system would be affected.. Fuel pumps are check with a pressure test not a code reader and that also tests the regulator valve in the fuel manifold. I am surprised that no codes showed up as there would be faults recorded from the rough running engine and I wonder if the scanner was connected correctly as every data plug is connected differently.
Posted on Feb 11, 2014
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Posted on Jan 02, 2017
If this car uses an electrically heated O2 sensor, the heater portion may be bad. If the car has a lot of miles, the O2 sensor may be getting bad also.
Posted on Aug 17, 2009
the fuel injectors are more than likley again your cause the are known for leaking and the smell of fuel usually means one or more was either improperly installed or defective
Posted on Jan 15, 2010
the best thing to do is to have a scan preformed on the engine, sounds like a mass air flow, but these parts are to costly to guess at. if the car will run ok at highway speeds of 60 mph or faster your fuel pump is ok.
Posted on Apr 19, 2011
Testimonial: "the car has been at the dealer for the past three weeks. they can't or won't give me the cause of the problem. so I am picking up the car today ."
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