Over the winter i had my motor built motor consist of ross 8:5:1 compression pistons,eagle rods,blueprinted and balanced rotating assy,arp main studs,cosworth head studs,nissan oem rod and main bearings,cometic head gasket,ported and polished heads,7 angle valve job,ported lower manifold,port matched manifold and alphawerks headers to head,supertec valve train ,supertec dual springs titanium retainers,brian crower 264in 264ex,
RC650 injectors,aam fuel return system,kinetix ssv manifold,underdox pullies,U-tec piggy back ,U-tec map sensor, turbo xs boost controller.And i'm running the tn stage 1 kit. WELL THE PROBLEM IS I KEEP HAVING A #6 MISSFIRE CODE.I swapped the coil packs,changed the plugs,sprayed brake cleaner to check for air leaks,did compression check,checked coil wire routing,changed cam and crank sensors,and all OK.Im running u-tec at map 0 and have the 380cc injectors in to break in motor using no boost notice missing around 2500-3000 rpms and it keeps throwing #6 missfire going to get my car tunned in 2 weeks just tring to solve problem first.PLEASE SOMEONE HELP!!!!!!!

 

Just woundering if it could be a cam out of time.Or the car needs to be just tunned

 

you might be running too rich and not getting being able to light off the micture under WOT.

BTW, you probably shouldn't be running in the "0" map if you have bigger injectors.

 

Im running off the turbonetics reflash on ecu

 

that could be part of your prblem.......the reflash is designed for a stock, high-compression engine. You can run alot more ignition timing and less fuel that what the reflash has setup for a stock engine.

Are you getting a flashing "check engine light" at WOT? You shouldn't get any misfire codes from just crusing around.

 

No i can start it up and rev it up and it starts missing.And while i'm just crusing it starts missing.

 

hmmm.......I don't have an answer for that one. Sorry!!

 

I would check to see if the chassis of the UTEC and stock ECU are properly grounded. And double check that the coil pack wiring is exactly correct (right cylinder to right pack).

If you actually changed coils and plugs, then it's a wiring harness or the utec??? I dunno though - might give turboxs a call - they're very helpful on the phone.

 

Found problem took #6 inector and swiched it with #2 injector and missfire moved to #2 cylinder.