2.5V6 to 3.0 conversion - ECU compatibility problems
Here is the story:
My 2.5 V6 CF2 removed, 3.0 in.....i was told that my old 2.5V6 ME 2.1 ecu might be used, only software must be changed. Old wire loom, 3.0 injectors, using old engine sensors except knock's....... was about to start the engine last night and strange fault codes appears.....
Injectors 3 and 6 - checked wires - OK, did FES injector test - ok.....still not trying to start the engine and wired original 166 3.0V6 CF2 ECU that friend of mine give me for checks - no injector faults, no fan, rev counter and relay errors as well.
Today i turned the engine for first time after full rebuild, started immediately, perfect rock solid idle, but throttle response was very slow, injector fault lights on the rev counter.
Removed injector 3 and 6 while engine on - there is change, so they work.
I was offered very cheap ECU from 3.0V6 CF2 but it was automatic gearbox, and i'm not sure if it can be reprogrammed.....my mapper said that maybe there is different pin-out and hardware......
Is there any chance to preserve my ecu - i compared 156's and 166's pins on eLearn and they seems exactly same.
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; 07-08-13 at 15:02.