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Ben V Ben V is offline
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Join Date: Oct 2009
Posts: 29
3.3 Turbo EFI misfire ? Any ideas ?

I have recently converted my C2 turbo to EFI.
Motec CDI and coil
964 N/A cams set @ 1.3
GT35R turbo
ARP headstuds and rod bolts

The engine is currently on the dyno and has been mapped, I am pleased with results however I have an intermittent misfire which gets worse with heat.

At 6200 RPM the engine starts to miss a little on a 2nd consecutive test (when hotter) the engine starts to miss at 5500 RPM. It does sort of pull through it.....

I have changed, spark plugs 4 different sets, ignition system including coil, injectors, wiring loom, both crank an sync sensors. Motec in recording no errors at all!

I have checked the cam timing and valve clearances all see good.

The engine is producing 400hp @ 0.7 bar of boost (with misfire) and 499.7hp
Can anybody give me any other ideas?
Old 05-31-2011, 02:15 PM
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