Popping at cold idle?

Bearded Forever

Type O Danzigative the Dark
Founding Member
Sep 4, 2000
4,931
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98
Vinland
I guess it's a miss I'm having, it sounds like small amounts of muffled air popping. Everytime it happens my rpm needle jumps up 300rpm but the engine doesn't rev any higher. You can tell when it revs higher from the higher tone but this is just a needle jump with the pop. What gives?
 
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I have a simular symptom. When I drive out of the apartment complex in the morning when its cold it almost sounds like there are little pebbles hitting my exhaust, like every 2-3 seconds. It is weird. I have new wires and a recent cap and rotor. i'll have to toss some delco plugs in and see what happens.