R32 Gtr Rev Hunting And Exhaust Popping?

[joeleo87]

Ive had a random cutting out problem with my GTR for about 3 months now after it going in and out of the auto electrician and mechanic, ive had the AFM reconditioned, the CAS and ignition module bench tested (4 hours under a heat gun), the fuel pressure tested and swapped out a mines ECU for a stk ECU. all with about 4 day intervals, towards the end its was cutting out everyday with out fail.

about 3 days after i got the stk ECU in my rear turbo blew so ive just got the car back with some new turbos in there. so havent really had time to see if the stk ECU fixed the problem.

got the car back friday, did about 300kms over the weekend and it was fine until today.... (the weekend was hotter then today, incase you guys think it heat related)

this morning the car lacked power mid range until i got boost, i thought the ol girl was cold? about 10 mins from home my car was rev hunting something fierce when i was stationary. also the exhaust was popping like crazy every time i gave it a bit of gas, now im not sure what causes the popping? missfire? to rich? i dunno...

the symptoms that surfaced today are the same as when its going to cut out.

please help me out here guys i dont know what else to do

[R31Nismoid]

So which ECU are you using at present?

also, as per your sig, there is no such thing as running in a turbo.

[joeleo87]

the STK ECU

it would take time for bearing/s to free up

[joeleo87]

also i just replaced the plugs (0.8 gap)

[R31Nismoid]

Ok so get it on a dyno or similar and check what the AFR's are doing if you suspect its running rich.

Sounds like good ole coils or a coil pack loom at the end of the day. You should be able to run 1.0-1.1 on the plug gap with that boost etc

Or could also be the O2's (related to idle 'hunting').

And no, the bearings do not take time to 'free up'. Have you ever seen inside one?

Your getting some grossly poor and incorrect information if thats what you've been told... if thats what you've assumed, then stop assuming and ask people that know because assuming things is bad with performance.

Turbos do not need 'running' in. Simple as that.

[joeleo87]

ok cheers!

the coil packs are like the only thing that haven't been replaced so far. How would i go about getting another loom? would that be something for the auto elec to do?

1 of the O2 sensors were smashed after the exhaust well snapped off at the shaft and flew down into my cat so it was replaced, shouldve got the other 1 done

[Tomei_33]

i have coil packs for sale, $150 ono + post, lemme know if ur interested

[Katatonic]

i have coil packs for sale, $150 ono + post, lemme know if ur interested

Where did it get serviced last?

Yes you should've replaced both O2 sensors.

The problem is only at idle? Anything with throttle/acceleration?

[__PhaseShiftDown]

Have you replaced the fuel pump?