misfire

Civic 2016+ 1.5 Turbo
Post Reply
Slwfk7
Posts: 8
Joined: Tue May 04, 2021 6:02 pm

misfire

Post 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, ... downpipe 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.
Attachments
datalog2.fpdl
(215.24 KiB) Downloaded 61 times
User avatar
Spunkster
Site Admin
Posts: 22745
Joined: Fri Sep 20, 2002 5:06 pm
Location: Hondata

Re: misfire

Post by Spunkster »

Have you checked the spark plugs?
Slwfk7
Posts: 8
Joined: Tue May 04, 2021 6:02 pm

Re: misfire

Post by Slwfk7 »

less the 5k on the plugs.. gapped at 30. probably drop it down to 28
User avatar
Spunkster
Site Admin
Posts: 22745
Joined: Fri Sep 20, 2002 5:06 pm
Location: Hondata

Re: misfire

Post by Spunkster »

Are you using OEM plugs?
Slwfk7
Posts: 8
Joined: Tue May 04, 2021 6:02 pm

Re: misfire

Post by Slwfk7 »

yes. ngk iridium 95112
User avatar
Spunkster
Site Admin
Posts: 22745
Joined: Fri Sep 20, 2002 5:06 pm
Location: Hondata

Re: misfire

Post by Spunkster »

They should be gapped to factory specs.
Slwfk7
Posts: 8
Joined: Tue May 04, 2021 6:02 pm

Re: misfire

Post 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
Slwfk7
Posts: 8
Joined: Tue May 04, 2021 6:02 pm

Re: misfire

Post 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
Slwfk7
Posts: 8
Joined: Tue May 04, 2021 6:02 pm

Re: misfire

Post by Slwfk7 »

what should the wastegate cmd read. mine is at8.00mm at idle and then sometimes dips into the negative during accleration
Slwfk7
Posts: 8
Joined: Tue May 04, 2021 6:02 pm

wastegate cmd

Post by Slwfk7 »

i was wondering if my wastegate actuator is not working properly. ill attach a datalog.
Attachments
datalog 2.fpdl
(72.9 KiB) Downloaded 64 times
User avatar
Spunkster
Site Admin
Posts: 22745
Joined: Fri Sep 20, 2002 5:06 pm
Location: Hondata

Re: misfire

Post 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.
Post Reply