V6 Malibu performs better in warm/hot weather

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Rob - 02 Jun 2005 18:58 GMT

My 2000 Malibu V6 performs much better in warm to hot temperatures then
on cool/cold days. Better acceleration and power and overall smoother
sounding engine. There's about 92000 km on the car now. Anyone have any
idea of what might give this?

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Al Haunts - 03 Jun 2005 09:34 GMT

>My 2000 Malibu V6 performs much better in warm to hot temperatures then
>on cool/cold days. Better acceleration and power and overall smoother
>sounding engine. There's about 92000 km on the car now. Anyone have any
>idea of what might give this?

Any codes set by the PCM?? Does the 'Check Engine' light come on??

Is this condition only when the car is still warming-up on cold days??

I'd start by checking the IAT & coolant temp sensors. If either have
gone flakey, your injectors will deliver an inappropriate amount of
fuel.

Regards, Al.

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Mike Walsh - 03 Jun 2005 14:02 GMT

Could be that the spark plugs foul in cold weather. When I live in the frozen north I sometimes used spark plugs a step hotter than the factory recommended it the winter for much improved driveability.

> My 2000 Malibu V6 performs much better in warm to hot temperatures then
> on cool/cold days. Better acceleration and power and overall smoother
> sounding engine. There's about 92000 km on the car now. Anyone have any
> idea of what might give this?

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Mike Walsh
West Palm Beach, Florida, U.S.A.

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