R32 Problem

[InterCooL]

gday boys

i just put a fmic into my brothers fairly stock r32 gtst

after doing some research i was planning to run it at 12psi

when adjusted to 12psi or so, the car had serious issues revving out, however it wasn't as tho it was struggling. i thought it was maybe a sort of soft boost cut (but it obvoiusly isnt at 12psi).

the car had issues revving out before (normal boost), just generally struggling. got a new fuel filter and she's sweet. she's sweet now at 10psi. but around 12psi it seems to make a splutter or a surge once or twice when revvving out, it just doesnt feel right. it apparently occasionally did this at 7psi, but does it everytime at

it also has brand new plugs put in, just normal ngk coppers

i'm suspecting a few things, not sure what tho!

gap on spark plugs need to be taken down

fuel pump

coil packs?

maybe ecu?

if anyone has any experience i'd appreciate any feedback, thanks alot!!

[Chris32]

More than likely its the fuel pump

Boost cut should hit in at or around 14/15psi, on my car its quite a harsh cut too

[BHDave]

There is no boost cut!

Check your plug gaps and the plug temp range, Id recommend bcpr6es which are a .8 gap and one step colder than stock.

Stick it on a dyno and check the air/fuel ratio. If it is leaning out and missing then get a new pump. If it around 11-12:1 and missing then look at your coils, if it is richer than that and missing then you you should look at bringing the mixtures back to about 12s before spending money on other things.

[InterCooL]

thanks for the replies

turns out it was misfiring at 10psi too, just not as bad as 12psi lol..

anyhow i took the gap down to 0.8 and it runs beautifully and hard at 10psi. but more than that and it was misfiring again...

oh well i'll have to look into this later i guess! might just get a gtr pump when one becomes available, cheaper than chucking it on a dyno..

[Craved]

its your coil packs if regapping it improved the situation..

time for some splitfires