Spark Plugs

[Black_Dub]

Hey how often should plugs be changed? and i also noticed a sort of grumble when i initially give the car gas,,,,any ideas there?

[dman090]

a grumble?? explain. lol

[SportLt]

hmm every 25-30k?

[Black_Dub]

Originally Posted by dman090 a grumble?? explain. lol

almost sounds like a slight tapping or like a pulley may be slipping....lol hard to explain it....its not a constant sound though usually on a hill slight or large going up never down though

[cobalt123]

most of the time spark plugs cause random misfires in cylinders, might be something else

[Mintyman01]

Most suggest 25K-30K but the stock ACDelco plugs from the factory are recommended for 100K I personally changed mine at 60K but they still had plenty of life left. Up to you in the end.

[cobalt123]

i dunno i havent changed mine since i got it, that 50k ish miles

[dman090]

i havent changed mine either and im setting at 53k

[Remy]

They are 100,000 mile spark plugs. I change mine at 50,000.. Make sure you use ACDelco plugs. No matter what car make you have, its always best to use the same brand plugs the manufacturer used originally.

The grumble noise.... does it happen when you raise the engine RPM slightly? See if turning your AC on and off. If the noise is only there with AC on, then its probably the same noise as mine. I've thought about installing an AC inline muffler, but its not that big of a deal to me since I narrowed it down to just a line noise.

[06ion2coup]

mine were starting to miss fire, so i replaced mine at 65k