Alfa-less and lost.
AO Silver Member
Join Date: Jan 2003
Location: United Kingdom
Re: Okay, I've put a new MAF on....
Are you saying that you have not got a perfect seal in the intake around the AFM? That's very bad news and as Markos says could result in killing the new AFM. However, if the poor seal is after the AFM in the intake then your car is getting a different amount of air from what the AFM is measuring, and especially as the engine shifts slightly in its mounts and sucks in different amounts the gap will open and close, so that could cause irregular running.
Also agree with Markos - poor starting unlikely to be due to new AFM. However, have you tried resetting the throttle pot using the battery off technique?