All Things Mk5 > How to Guides / Troubleshooting

Poor idle hunting/misfire

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Jimmm:
Recently bought an ED30 and I have noticed that it idles poorly, seems like it's missing/hunting, is a lot worse on the cold start. The revs seem to slightly flutter by 100rpm if that? i thought it may have been the pcv valve but upon taking the oil filler of while running, it's made it run a whole lot worse then what it was. It had plugs about 20k ago(on 60 now) so I can't see it being that and surely a coil pack would chuck the light up?oh and I forgot to add that it's only on idle that it misses. Shall I just change the PCV for good measure seen as there a weak spot? Has anyone had this sort of problem?

Thanks in advance

olethalb:
check for air leaks around the inlet and pcv pipes

Jimmm:
Are the pips prone to failure?

AndyBrown:

--- Quote from: Jimmm on June 05, 2015, 09:32:17 am ---Recently bought an ED30 and I have noticed that it idles poorly, seems like it's missing/hunting, is a lot worse on the cold start. The revs seem to slightly flutter by 100rpm if that? i thought it may have been the pcv valve but upon taking the oil filler of while running, it's made it run a whole lot worse then what it was. It had plugs about 20k ago(on 60 now) so I can't see it being that and surely a coil pack would chuck the light up?oh and I forgot to add that it's only on idle that it misses. Shall I just change the PCV for good measure seen as there a weak spot? Has anyone had this sort of problem?

Thanks in advance

--- End quote ---

Mine was the same, changed pcv just in case and it sorted the problem.

Jimmm:
I'm hopeful that it will be just that, I'll know more Saturday morning, only had the car 5 days and got do the inner tracks rods, I look forward to when it's running good tbh

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