Misfire ??? tune related?
Misfire ??? tune related?
I´m having a constant misfire between 4k and 5.5k rpms at half throttle (around 8/10 psi), below that I can rev no problem, WOT no problem. Tried COP and stock coils, new plugs, smaller gap, could this be tune related?
Can too much fuel or too lean condition cause a misfire? or too much advance/retard timing cause a misfire?
Everything seems normal, wideband shows good afr, timing is 14/17 when misfire happens.
Thanks for your reply
Can too much fuel or too lean condition cause a misfire? or too much advance/retard timing cause a misfire?
Everything seems normal, wideband shows good afr, timing is 14/17 when misfire happens.
Thanks for your reply
I´m having a constant misfire between 4k and 5.5k rpms at half throttle (around 8/10 psi), below that I can rev no problem, WOT no problem. Tried COP and stock coils, new plugs, smaller gap, could this be tune related?
Can too much fuel or too lean condition cause a misfire? or too much advance/retard timing cause a misfire?
Everything seems normal, wideband shows good afr, timing is 14/17 when misfire happens.
Thanks for your reply
Can too much fuel or too lean condition cause a misfire? or too much advance/retard timing cause a misfire?
Everything seems normal, wideband shows good afr, timing is 14/17 when misfire happens.
Thanks for your reply
the timing shouldn't be your issue. At only 5-10 psi that timing sounds fine. Misfires can be lots of things. Bad MAP sensor, bad cam position sensor, boost leaks. There's lots of threads out there on things to start trying.