I have a '99 Pontiac Grand Prix SE, when you accelerate, the engine makes a clicking noise. What could it be?

Answer 1

Could be lifters-yes. I had a Dodge Colt that used to do the same thing and drove me nuts! Come to find out it was a bad plug wire that was allowing a spark leak to the engine block-especially when it was damp out. Something to consider if all else fails.

Answer 2

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Answer 3

if the clicking noise is related to engine speed, its your lifter(s) that run your valves. they are making noise when they slap.

Answer 4

ignition timing too far advanced or wrong grade of fuel

Answer 5

could be crank bearings with slop