Question about 1999 Chevrolet Silverado 1500

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1994 Silverado stumbles on acceleration when cold

1994 Silverado stumbles badly on acceleration when cold . . .but cleans up when warm (after 5 min or so). Mostly happens at > 1/2 throttle.

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Is the check engine light on? If it is, take the truck to an autoparts store and have them use a scan tool to retrieve the fault code(s) stored in the computer. I would suspect a faulty throttle position sensor or bad EGR valve, but the code(s) should narrow the problem down. Sure hope this helped.

Posted on Jul 20, 2009

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Knocking goes faster when accelerating when cold ???

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2. Do not put cleaning agents mixed with oil.

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Hesitation or stumble during acceleration


take your car for a tune up
if they are carburetor type motors you may need your carbie cleaned and a tune up
if you clean it your self with carbie cleaner it may increase in idle speed this is nothing to worries about it is a simple adjustment
with a carburetor type motor they tend to idle higher when their cold this is the automatic choke kicking in and normally it should happen till the car is a bit warmer and the accelerator has been depresses
although a car should idle at 800 rpm my paddok car dose when it is cold it idles at 1200rpm i like it this way as the car warms up quicker as i will not drive a car while it is cold
hope this helps
ricko

Oct 20, 2008 | 1989 Nissan Pathfinder

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