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Lumpy idle .

ROHRL

ROHRL

PCGB Member
Member
Hi
997 2s has been experiencing a very slight 'lumpy' idle . This is noticeable from 850 to 1200 rpm
Its just the odd almost ..missfire. Any thoughts on possible cause to look for would be helpful..
Car has been in storage over winter and had a recent check over by OPC .
Thank you.
 
Hi Gary,
Thank you for the idea re coil pack.. There is no CEL . Check engine light displayed. But i guess it could still be a coil pack.
 
Thank you Gary and Rodney, i'll ask the OPC to check the coil packs may be crack in one and the weather has been damp. Would the MAF sensor cause a similar issue or is it different.?
 
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