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misfire
Posted: Wed Mar 23, 2022 12:29 pm
by Slwfk7
ive noticed a misfire that comes at 1/2 to full throttle. im going to add my data log with this post. im running the 91 oct high opt flex fuel tune. modifications are fmic,mishimoto cai,siri moto flex fuel kit, ... exhaust and exhaust. ive changed the pcv and hose. cleaned maf and both maps. doesnt seem to have a popped head gasket. any help would be great.
Re: misfire
Posted: Wed Mar 23, 2022 12:41 pm
by Spunkster
Have you checked the spark plugs?
Re: misfire
Posted: Wed Mar 23, 2022 12:58 pm
by Slwfk7
less the 5k on the plugs.. gapped at 30. probably drop it down to 28
Re: misfire
Posted: Wed Mar 23, 2022 1:33 pm
by Spunkster
Are you using OEM plugs?
Re: misfire
Posted: Wed Mar 23, 2022 2:01 pm
by Slwfk7
yes. ngk iridium 95112
Re: misfire
Posted: Wed Mar 23, 2022 4:33 pm
by Spunkster
They should be gapped to factory specs.
Re: misfire
Posted: Wed Mar 23, 2022 5:32 pm
by Slwfk7
none si is 30 si is 28. im running si gap because of the boost being at 24psi. have already check with factory specs and it still does the same thing. reason why i posted on here with the datalog to see if anyone may see something in it or tell me why my fuel trim is all out of wake.. pretty much everyone ive talked to is stuped because the misfire comes and goes
Re: misfire
Posted: Thu Mar 24, 2022 3:05 pm
by Slwfk7
Slwfk7 wrote: Wed Mar 23, 2022 5:32 pm
none si is 32 si is 30. im running si gap because of the boost being at 24psi. have already check with factory specs and it still does the same thing. reason why i posted on here with the datalog to see if anyone may see something in it or tell me why my fuel trim is all out of wake.. pretty much everyone ive talked to is stuped because the misfire comes and goes
Re: misfire
Posted: Fri Mar 25, 2022 2:33 pm
by Slwfk7
what should the wastegate cmd read. mine is at8.00mm at idle and then sometimes dips into the negative during accleration
wastegate cmd
Posted: Fri Mar 25, 2022 2:37 pm
by Slwfk7
i was wondering if my wastegate actuator is not working properly. ill attach a datalog.
Re: misfire
Posted: Fri Mar 25, 2022 4:33 pm
by Spunkster
The wastegate appears to be operating as it should. The fact it is misfiling at less than full throttle and is not consistent meant it could be wiring or mechanical in nature.