My car is turgocharged but I'm sure it'll apply to all. Those of you who have misfiring problems, stuttering at certain rpms or smell rich fuel mixture, problem may not always be wires, coil or plugs. My rpm would jump up and down at idle and almost dies out sometimes. Sounds familiar to some of you? Well problem can also means vacuum related which mine was. My pcv check valve fronm the vavle cover to the intake mani went bad. Sometimes it would suck and blow both ways and when I shook it, it made quite a rattling noise. Got me a new check valve from autozone for like 2 somthing and the problem went away. So take this notice and remember it noobs.
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"Tell them of us and say, For their tomorrow, We gave our today." -- The Kohima Epitaph
#62857, "RE: Misfire and stuttering *notice*" In response to Reply # 3
not rattle excessively. It rattles enough so that you can hear the flap open and close. But if it rattle excessively, and you can blow through both ways....it's a bad apple.
intricatelines.com/ -graphics and vinyls
"Tell them of us and say, For their tomorrow, We gave our today." -- The Kohima Epitaph