engine missfiring when hot and on boost

[Guest Usmann A]

Possilby faulty coolant sensor, causing a warm up enrichment to stay engaged, and if yours has some ign trims active, may well affect the timing.

 

Id check the ovb, crank, cam sensors, map sensor,TPS,etc blah.

 

Got any datalogs of when this happens?

[Stevie Boy]

Possilby faulty coolant sensor, causing a warm up enrichment to stay engaged, and if yours has some ign trims active, may well affect the timing.

 

Id check the ovb, crank, cam sensors, map sensor,TPS,etc blah.

 

Got any datalogs of when this happens?

 

No Datalogs as such yet, but i have just fitted AEM WB02 last weekend, I have an E-01 hooked-up to the E-Manage and have wired in output from WB02 to E-01 External input wiring harness not yet set-up scale and think i can only log 3 sets of values with E-01 so not sure which would be most helpful in daignosing miss.

 

Also don't think Emanage uses cam sensor signal (would fault be more freq than intermittant if it was suspect?), just rpm, map and TPS, have the Ignition and Injector harnesses fitted and mapped by Whifbitz so map data is locked and i can't really check everything.

 

Did consider fact i could have a gammy injector as still running JSpec 440's, have Walbro and Pulsation damper bypass but stock Fuel Pressure Reg, take it it's not a 5min job to whip em out to check spray pattern, haven't checked fuel pressure but would have thought AFR's would lean during miss if was lack of fuel?

 

I noticed on a test run after fitting WB02, the AFR on full throttle @1.2bar was approx 11 which seemed to drop to 10.5 at exact point it would miss, need to spend some more time on but just so difficult trying to check these things on the streets of London......... I need and Airstrip or summink!