Right, A 2001 156 ts i've been working on is driving me round the bend...
It starts and runs well from cold, then after a few minutes it starts hunting, between 700 and 900rpm. The engine runs well at higher revs, although there is a slight lack of power, and it seems to run rich whilst idling erraticly.
Obvious things to check are air leaks, there are none on the intake system!
I've hooked up alfadiag but it says the system is clean with no faults....
I've hooked up to alfa examiner, from an Alfa workshop near me, as i didn't believe alfadiag, but they also found no faults.
A bit of history:
The car was fitted with another engine, by the looks of it an early gtv (2-wire temp sensor on the rhs of the head, also a short lead cam sensor was fitted, that didn't match the engine loom connector).
The cam sensor was replaced with the correct one (the cars a 2001), but still the same!
I took the cam wheel off and noticed a distinct difference between that and one from the right era, swapped that over - still the same....
I've swapped the maff onto another car and it works well, so maf is ok.
The cylinder compression test shows 200psi on all 4, so mechanicly the engine is fine.
I've fitted new spark plugs, disconnected each injector in turn, nothing shouts out to say theres a problem.
Other than removing the inlet manifold and checking for cracks / leaks (which I doubt), will the crank sensor cause this problem and still let the engine rev and show no errors???
Any help appreciated