Got a new MAF for my MY00 from a dealer last week and when I got it out of the packaging, it seemed dirtier than one I'd just removed from the car.

The old MAF had 4 pins as does the new one, but I thought I'd read that the older ones had 5 pins - I'm starting to think that my car is a MAF eater!

Running is a little smoother, although idle speed seems quite low, and sounds a little inconsistent.

Would an ECU reset improve things?

 

Has your car got an induction kit on? If it has this could be the cause of your problems.

 

MY 93 wrx

Mine has a 4 pin and is original although could be knackered.

Is yours rough / lumpy on slight throttle?

WW

 

Your new MAF should not have been looking dirty at all... i bought one,although the wrong one, it was looking brand new...

Yes an ecu reset would help as it re-trains the ecu to work with the new MAF but if your MAF was dirty when you got it maybe its been used? and maybe not as healthy as a new MAF just a thought i could be wrong

 

New MAF was bought from Stan Palmer's last week, I couldn't tell the new and old one apart, except the new one had white writing on it.

Car due in for a service tomorrow, will ask them to have a look at it and reset ECU while they're at it.