Question about 2004 Chevrolet Malibu

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When its cold outside, my car will accelerate on its own. Ive had this car for 2 winters now and it only happens during this season. Any ideas of what could be causing this?

Took it to a certified mechanic and they drove my car all over Lansing, MI and couldn't get the vehicle to accelerate on its own to find what could be causing this.

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Is it a hard acceleration or slow but constant acceleration? Is off of idle or is it a highway speed? Are you trying to accelerate but the car is doing so faster than you think it should or does it continue to accelerate after you reduce the throttle input?

Posted on Nov 26, 2014

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Ethan, do you have a twitch in your right leg that only happens when it's cold ouside? Just kidding! It's obviously a temperature thing if it only happens in the winter. Possibilities could be intake air temperature sensor, idle control sensor or ambient air temp sensor. It would be a good idea to see if there are any pending engine malfunction codes possibly stored in your car's computer. Even if your engine light is not on, there may be a pending codes that might help pinpoint the problem. Does the car surge at idle or when your driving? A little more information as to when it happens and how low the temp needs to get to trigger this condition would be helpful.

Posted on Nov 26, 2014

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Posted on Jan 02, 2017

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SOURCE: 1995 Chevy Silverado 4X4 cold air blows through floor vent

none of the above, the vent door is stuck inthe open position most probable cause is vacum leak look closer to your fire wall and you will see a very thin vacum hose going into the vehice which seems to be unpluged!!

Posted on Nov 13, 2008

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SOURCE: 1999 blazer 4x4 lacking heat during cold days

Do you have the red fluid or the green fluid in the radiator if you have the red get that junk out of there flush the radiator i had this problem in 98 The dealer said it was ok to put the green back in but i would check the thermostat first

Posted on Oct 04, 2009

Testimonial: "thx! it was the thermostat. changed the thermostat and took care of the problem."

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SOURCE: 1999 Chevy Silverrado, 5.3 Z71.

Did you notice if you where low on gas either or both times this happened? I wonder if it's not a fuel pressure problem? Other wise might give it a tune up air filter, plugs, fuel filter. I've also noticed that chevy's are always happier with a fresh oil change.

Posted on Sep 13, 2010

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SOURCE: I own a 2001 Chevy Blazer 4.3 4x4 Cold outside

check both the battery and the alternator if batt. is old or shows weak replace it. it will mess with the computer readings on it

Posted on Jan 22, 2011

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