Weird Boost

[Klymax]

Hey guys,

I've been doing some searching for a weird problem im having. My R34 begins to boost nicely an spool fast until 3000rpm when it suddenly dies off leaving slow acceleration until about 4500rpm where it agian picks up an continues until 6-7k. As it dies the air is heard as loud as normal so i initially thought it was simply a leak until i rev'd it hard past 4500rpm.

It does this in all gears (manual) 1st and 2nd seem to be not so bad as it will fly through the range with minor (although its felt)hesitation.

The car is totally stock besides a cat back blitz exhaust, 60,000k's

Any idea's thoughts?

Cheers.

Edited October 16, 2007 by Klymax

[R31Nismoid]

Sounds like the normal problem everyone else has.

Stock ECU causing problems.

4500rpm is exactly where rich/retard comes into effect, and hampers performance.

A ECU (good option) or S-AFC (cheaper option), will fix it. Otherwise thats all there is. If it didnt have an exhaust you'd probably be ok.