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2000 v8 started idling rough out of the blue. Not bad enough that it feels it will quit but enough to give it a wicked shimmy.
Runs fine while giving it gas.
 

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Tuneup lately? Check yer plugs to confirm what's going on inside the combustion chamber. Is the check engine light on?

Bad gas?

Any clogs in yer air filter?

How's that throttle body looking? ;)
 

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It's hard to diagnose a miss without being there to see it in person, but here goes- The miss could be the result of many things, e.g. a vaccum leak, a leaking or plugged fuel injector, a defective ignition coil, sparkplug connector short, worn sparkpugs, poor valve sealing ect... Start with a scan of the ECM. Are there any DTC's present? DTC #300 indicates a random miss, #301 through 308 idicate the exact cylinder that is malfunctioning. Do some basic underhood checks and report back what you find .... we'll help you figure out from there.
 
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