Hits 4500 To 5000 Rpm Than Dies

[Badgaz]

I am putting my money on it being boost cut. I am with Superben, I bet this bloke is looking at the boost gauge thinking its in psi

Do yourself a favour and find a local Skyline specialist and get them to set the boost up on the dyno.

Badgaz, are you really saying that modifying a car to fix a problem is a good thing? You should never do that. You should always start with a perfect running car and modify from there. Installing mods to cover up an issue is only going to end in tears

i think what i'm really saying is ...when factory items break thats when you should improve/modify them.....in this case the factory ECU is broken because he wants to modify his car

[blade20034]

its in psi 5psi was max with out the boost controller connected what i am going to do is put a new fuel pump in and a better afm and chuck it up on the dyno and get tuned up i think its the best option

[Badgaz]

do you have a programmable ECU? the stock r33 rb25det ecus are not programmable.

[blade20034]

my tuner is getting me a ecu he is a member on here

[HiveFleetAbyss]

Is this issue occuring mostly in first and second gears?

Was having the exact same issues in my 94 33 gtst and I was sure i was onlt running 9/10PSI until I went on a dyno, I wound it back about 2Psi down to "8" and the guy said it was doing 10psi on the dyno so it was more like 12psi instead of the 10 i thought. Since then havn't had that issue.

[ido09s]

I would strongly suggest finding the problem first and going from there. Nothing wore than trying to band aid fix an issue

[Šime]

There's some stuff to try in this thread:

http://www.skylinesaustralia.com/forums/topic/32356-missfire-boost4500-5500-rpm-the-answer-for-me-at-least/

What are your plugs gapped to? I had the same misfire and going from a gap of 1.1 down to 0.8mm solved it for me.

[Plattsy]

plugs coilpack or rnr.

simple. all take less than an hour to fix.