Help Rb25Det Wont Rev Past 2500Rpm?

[donburtron]

Hi all

i have recently purchased a s1 r33 and im having trouble getting it to run properly.

i done a engine swap and now it wont rev past 2500rpm. It sounds like it is hitting some kind of limiter.

the engine has been dyno tuned for 366rwkw at 22psi or 248rwkw at 15psi.

its doing my head in as i cant find the problem.

I have done these following mods,

Custom turbo

Fmic

Bosch 023 intank pump

sard fpr

plugs

dump pipe front pipe and exhaust

new 02 sensor

New z32 afm

i thought it could be the fuel pump, fpr, plugs or afm so i replaced them all and the problem is still there.

I have tried unplugging the afm and its the same and with it pluged in.

the only thing i can think of is the sfm wires might not be hooked up properly.

any help would be awsome

regards

josh

[Leeroy94]

I'm having this problem with my rb20det but it won't rev past 5000rpm..

But 2500rpm could be knock sensor..

Unfortunately 2500rpm and 5000 rpm are two different cases. Yours won't rev when you have next to no boost pressure whereas my car won't rev while in boost.

I'm keen to see what more experienced people have to say in regards to the solution for this problem

[niZmO_Man]

Sounds like AFM problem. Double-check the wiring/plug.

[donburtron]

Iv just got the afm off and found a wire not connected so im going to fix the wiring up and ill keep it posted..

thanks for both your help

[Plattsy]

was gunna say its afm mate.

post results dude. for future reference.

[donburtron]

The end result is the AFM wires were spliced on instead of soldering..

Runs like a dream.

thanks everyone for your help

[Kane_R32]

the engine has been dyno tuned for 366rwkw at 22psi or 248rwkw at 15psi.

7PSI = 128 KW gain, or 18kw per psi.. is this correct?