Car Pinging On Boost And Stops Revving At 6000

[jaonr84]

Hi guys I own a r32 skyline it's pinging when on boost and it doesn't rev all the way it stops at 6000 any ideas how to fix them

[Hanaldo]

Gonna need to give us more than that mate, playing e-mechanic is difficult at the best of times.

Mods, engine, how long it's been doing it, any recent changes you've made?

[jaonr84]

It has a front mount inter cooler ,exhaust,apex safc,tuned to 13 psi,boost controller it's been doin it for a few months plus its got a greedy speed limit cut thing near the computer

[Hanaldo]

And are you sure it's pinging not misfiring?

If it is actually detonation, I wouldn't be surprised if it was because of the SAFC. They are rubbish things, you can't adjust timing at all with them. Otherwise a dying fuel pump might explain both issues. However I've got my money on an ignition breakdown, given you haven't mentioned coilpacks at all? Are they still factory items?

[jaonr84]

Yeah standard coil packs

[Hanaldo]

I suggest borrowing some known working coilpacks, preferably Splitfires or new OEM's if you can.

[ichi-go]

My mate's car is doing this as well, and he checked it with the tuner and found out the fuel pump wasn't supplying enough fuel at high revs, his cut out around 5500 rpm as well

Best to chuck it on a dyno, you will know for sure what's the issue, other than blindly buying parts which could end up costing more and not fix it

[4R33L]

It will be your fuel pump. Happend to me in my 180, exact same thing! Surprised u haven't upgraded your pump with those mods anyway!

Normally the first mod a import car cops after the warfys suck all the sand out of the bottom of ya tank