Figure this one out!!

Thread starter rcsalmons
Start date Jul 21, 2008

rcsalmons

New member

Jul 21, 2008

Can anyone help me out?

The car - a 944 Turbo S 1988 with Tial 38mm, 3 bar FPR, MBC, chipset.

So I took the car to Chris on his Dyno, it produced 294Hp @ 17psi boost. Fuel curve looked OK.
He also highlighted the car was running v.rich at idle and part throttle approx 10:1 AFR.

Changing the ecu took the AFR upto 14.5:1 and all OK at part throttle. However I have now lost a lot of performance, the boost labours in and I would guess power is down to 200 ish hp.

I tried a different make of chipset still the same.

Then swopped AFM, KLR and DME with known good units - thanks Paul. Still the same!

Reverted back to original ecu and the car pulls like a train again - AFR problem still there.

I am now going through all the DME/KLR wiring but if anyone has any ideas please let me know I am at a total loss.

Have checked all temp sensors, tps, DME relay.

Thanks

Rich

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