Question about 2003 Pontiac Grand Am

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When driving my pontiac grand am 2003, the motor runs fine but will not get up to speed without smashing the gas, engine rpms will rise and slowly speed up, seems like the transmission is not hooking up, but doesn't feel like its slipping, motor will just bog down. while at highway speeds it will not stay at speed, will not shift sometimes either, just had fuel pump replaced also.

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Get the fuel filter checked.Is it getting clogged.If yes, then clean it and check.Also check the spark plugs, if they are old, it has to be replaced.Also if plugs get wet due to moisture then engine bogs down, due to lack of spark. ----------- Also get the throttle body cleaned with throttle cleaner.Also check the MAF sensor and o2 sensor.The o2 sensor before and after catalytic converter.The MAF sensor located inside the engine compartment. On driver's side, look on top of the air intake box to find the MAF sensor.------ Clean both the sensor and recheck.----------- This possibilities will help to trouble shoot the problem.This should help.Keep updated. Thanks.Helpmech.

Posted on Apr 09, 2011


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