Dnk Posted March 31, 2015 Share Posted March 31, 2015 Looking for all the reasons this could happen and could it be down to stock valve springs not being up to the job ? This is on a SEAT K1 Below 18 psi it appears to be fine, above it gets the missfire Link to comment Share on other sites More sharing options...
David P Posted March 31, 2015 Share Posted March 31, 2015 Try smaller plug gaps. Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 31, 2015 Share Posted March 31, 2015 Whats the fuelling like, I would be looking at this along with plug heat range and gap. Link to comment Share on other sites More sharing options...
Dnk Posted May 12, 2015 Author Share Posted May 12, 2015 Sorry for the late reply It would appear to be the coil packs weren't up to the job, a new set has been fitted and the missfire has gone Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 12, 2015 Share Posted May 12, 2015 You can tell on a rolling road if the boost is unseating the valves as the HC's will REALLY go to hell, and you usually get a rapid, cyclical boost, as it recovers again, then holds the valves open again. In your case CDI is your friend Link to comment Share on other sites More sharing options...
Guest luki77 Posted May 12, 2015 Share Posted May 12, 2015 what? http://freeflpics.gq/9/o.png Link to comment Share on other sites More sharing options...
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