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2000 Pontiac Grand Am runs bad when car is cold

Tiny
RADARADA
  • MEMBER
  • 2000 PONTIAC GRAND AM
Engine Performance problem
2000 Pontiac Grand Am 6 cyl Front Wheel Drive Automatic 166ooo miles

when I crank my car in the morning when the motor is cold it runs bad when I gas it but when the engine warms up it runs fine. What is causing the problem and what can I do to fix it.
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Monday, August 2nd, 2010 AT 11:02 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
It sounds like a bad temp switch. That is the part that tells the computer ambient temp and coolant temp. Based on that, the computer determines how rich or lean to make the air fuel mixture. Is there any smell of fuel or anything that you can think of that may help? Also, let me know if the check engine light has come on.
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Tuesday, August 3rd, 2010 AT 10:53 PM

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