I have friend who's doing a Porsche 914/WRX conversion. The car starts but runs like crap (stumbles, idles rough), UNLESS he unplugs the MAF sensor. Then is smooths out idling about 1200 cold and then down to about 800-900 warm. The ECU is not throwing any codes. Any chance the MAF sensor could be bad?

Thx...Ed aka W9R1

 

^yes, and check to make sure that it's not backwards

 

Holy crap.

 

I was waiting for that

 

its not the maf, if it smooths out its going in to limp mode. check for vac leak.

 

not necessarily, I speak from experience.

 

It could be a vacuum / boost / inlet leak. S&R has teh sexay smoke machine for things like this...

Siegel

 

I'd say check to see if the MAF is on backwards if not i could be bad. Check the easiest things first.

Also, post pictures. Those conversions are badass!

 

hey ed i met you a few years back was wondering if you were still around and still have the car