2000 Pontiac Grand Am Rough Idle and hard to start!

Tiny
ROCKAFELLA7269
  • MEMBER
  • 2000 PONTIAC GRAND AM
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 136,000 MILES
The grand am runs good I bought it off somebody and they told me it runs a little rough and sometimes stalls but they had a mechanic look at it and he couldnt find the problem because it has never gave any codes. I have to press the gas a little bit to get it to start and when idle, the rpms will drop and it will put a little bit. It has a new fuel pump fuel filter all new spark plugs that were put on by the shop and I also went and bought a throttle position sensor and put it on. No change and today the engine light finally came on and it said p0300 random cylinder misfire detected! It is the 2.4 twin cam engine and its a 2000 grand am! PLEASE HELP!
Sunday, April 12th, 2009 AT 1:10 AM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi rockafella7269,

Thank you for the donation.

For symptoms described, attached is a diagnostic guide.


https://www.2carpros.com/forum/automotive_pictures/192750_Hesitation00GrandAm01_1.jpg




https://www.2carpros.com/forum/automotive_pictures/192750_Hesitation00GrandAm02_1.jpg



For DTC code P0300, you would need a suitable scanner to do the diagnostic.


https://www.2carpros.com/forum/automotive_pictures/192750_P0300Diagnostic00GRandAM01_1.jpg




https://www.2carpros.com/forum/automotive_pictures/192750_P0300Diagnostic00GRandAM02_1.jpg




https://www.2carpros.com/forum/automotive_pictures/192750_P0300Diagnostic00GRandAM03_1.jpg




https://www.2carpros.com/forum/automotive_pictures/192750_P0300Diagnostic00GRandAM04_1.jpg




https://www.2carpros.com/forum/automotive_pictures/192750_P0300Diagnostic00GRandAM05_1.jpg




https://www.2carpros.com/forum/automotive_pictures/192750_P0300Diagnostic00GRandAM06_1.jpg

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Sunday, April 12th, 2009 AT 12:57 PM

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