2.5 misfire when engine cold.
I fought that problem on my 2.0 TS almost 3 months, now i have my V6 after full engine rebuild, with the same problem - when started from cold, idles fine, but if i hit the throttle little bit too sharply, detonations from intakes begin. Must rev high to be able to pull from first gear, misfire and detonations again.....new NGK sp. plugs, new O2, new MAF, tested all hoses after MAF for leaks....when engine's warm - no problems......
Engine is CF2 type, originally with 2 sensors on the thermostat - one for ECU, and other for fans - but wire loom is for engine with only one sensor -3 pinned type sensor, no plug for other one. It's new too, when i compare temp readings via Alfadiag when start from cold, it match the approx ambient temp, and it rising normally.
Any other things that i may miss?????
Rear Wheel Drive Mid - Engined Alfa 156 3.0 V6 '99 - trackday car
Alfa 156 2.0 TS '00 - daily car
Fiat Coupe 20VTurbo, GT2860RS, water-meth injection 120cc, custom manifold, 3" Downpipe, FMIC - entertainment car
Last edited by Speedmaster; 07-11-09 at 20:40.