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25/07/2021 10:15 am
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Hi Scotty. I have a 2007 XC70. I'm noticing a slight missfire at idle but no codes. Has new sparkplugs and didn't help that. I ran some fuel injector cleaner with pea and it didn't help much. I'm going to try to attach the live data. Maybe you can help me. Thank you.
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25/07/2021 10:40 am
Are all your engine & transmission mounts verified good?
If they are, check for any vacuum leaks. For other possible causes -
https://carkiller.com/scottykilmer/qa/misfire-4/
@inthrustwetrust thank you. I didn't find any vacuum leaks. The motor mounts could be replaced but not enough to cause the missfiring feeling.
It could be a lot of things, but continue driving it till it gets worse or throws a code. You could also try this to see if it helps -