power drop/missing over 5000rpm

[NickR33]

I have a stock R33 Series 2 (with HKS Pod)

When I have one or more people in the car it revs strongly and smoothly to 5000rpm but between there and the redline it misses and I get power drops. The car is in great condition only 60,000kms on the clock. Even with only me in the car it doesnt seem to want to go all the way to redline (not that I do this very often).

Under 5000rpm it is faultless.

Is it due to the standard exhaust, spark plugs gapped too wide, etc. I just want to know which mod is most likely to fix this problem.

[yogi000]

I had the same sorta problem aswell on my r32, so i did a diagnostic on the ECU which came up with the knock sensors. Once fixed it was a totally different car. Just something to think about.

Also have look around on these forums, a few people have had similar problems.

[predator]

Can sometimes be a slightly mistightened hose clamp to your intake (say intercooler piping). Often that can only become exposed when a heap of pressure is going through it, and then the ECU has troubles with the lack of air and starts cutting to protect the engine.

I've had that problem a couple of times with it not revving past 3k, didn't know wtf was going on until i discovered it was just a lose hose clamp on my intercooler. Clamp properly tighened and back to 7k redlines..

otherwise plugs, coilpacks, etc.. the usaul..do a search