Miss Firing 5.5k Rpm +

[MUZT3K]

ok his the situation, im running a cat back, fmic boost controller set at 12 psi and a high flow turbo stock ecu with split fire coil packs which i purchased 2nd hand in good conidition not too long ago so please dont tell me its my coil packs...only 2 days ago i got the high flow turbo put in..and im hitting bout 15psi with it on the 12psi setting and today i just started noticing the miss firing on 2nd gear round 5.5k rpm. my guess is the stock ecu is cutting it out?

any thoughts would be most appriciated.

[R31Nismoid]

2nd hand items - could be coil packs.

However running 15psi on the factory ECU is doing no favours at all. You've probably fouled the plugs, it'll do it again and again as well.

Do NOT run aftermarket turbos on the factory ECU. It is a plan for disaster and lots of issues such as what you are going through.

[MUZT3K]

hmm well its not doing it at 12 psi, which is my low setting...will it be safe to run it on the low setting till i get a after market ecu?

[Sheriff Wan]

It will be safe to get an aftermarket ECU as R31Nismoid has said...

I get that you probably dont have the time/money for it right now or whatever the case may be - but I assure you it will be more expensive to just risk the motor... no point risking it for piss all gain at the moment anyways

[Pattygtst]

is it missfiring or r & r?

ecu

spark plugs

coils

[boostn0199]

what sparkplugs are you using? NGKbcp6re usualy miss after 14psi you need NGKbcp7re for higher boost and also it is prob your car hitting r&r and fouling the plugs, there no point of putting to 15psi anyway with stock ecu the car just runs shit

[MrStabby]

You didnt mention what plug gap you're running. Many people close it down from the factory 1.1mm to 0.8mm to help with missfire.

[SimonR32]

sounds like rich and weetard

[buckets]

2nd hand items - could be coil packs.

However running 15psi on the factory ECU is doing no favours at all. You've probably fouled the plugs, it'll do it again and again as well.

Do NOT run aftermarket turbos on the factory ECU. It is a plan for disaster and lots of issues such as what you are going through.

+ 1

[SECURITY]

the ecu cant handle it mate. if your AFM is hitting ~2.8v @ 3500rpm and ~4.1v @ 5.5rpm you will hit r&r pretty bad. turn the boost down to around 10psi and see how you go.

either way you will blow your motor by running upwards of 5.5k with a hiflow.

Edited December 12, 2009 by SECURITY