Morning lads,

I recently fitted an s14a bentcam sr into my uk s13.

The engine has good compression and leakdown figures and i have reset the cas so timing should be in the ballpark.

When i start the car up it has a slightly long crank, but then starts up perfectly running on all four, will rev, is responsive, no stuttering at all.

But as soon as the engine gets warm, it starts running on 3, if you ask for throttle at this point it will just bog, or stutter untill it eventually stalls.

Ive checked the iacv, coolant temp sensor and the coilpack wiring and packs, today im going to check fuel pressure, i cant find any induction leaks (although because it idles and revs so perfectly i dont think there are any leaks) does anyone have any other ideas? I also might check plug gaps but i cant see why the spark would be getting blown out at idle?!

Cheers lads!