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Re: car stutters after plug change???????
if the car ran fine before the tune up, then i would say its somethign you changed, just intuition. my best guess would be that when you were trying to take off the spark plug, you cracked the porcelin boot, and its grounding into the cylender head or exhaust manifold. also i would double check the fireing order of the plug wires, and check their condition, see if you have a burn through. but my best guess is its the old spark plug, that its damaged in some way and therefore not functioning properly. i would get it out, did you try to get it from the bottom? i always put the car up on a lift, or jackstands, to get to the back plugs from the bottom, MUCH easier. should fix it. that is if there was nothing wrong before the tune up that is.
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