Why would a GMAF cause missfires?
Thread Starter
TECH Veteran
Joined: Feb 2002
Posts: 4,049
Likes: 2
From: Loganville, GA
Why would a GMAF cause missfires? I have been running my stock MAF but i put my G. Maf back on and the car started missfiring. Put the stock maf back on and the prob is gone? why would that cause it?
Thread Starter
TECH Veteran
Joined: Feb 2002
Posts: 4,049
Likes: 2
From: Loganville, GA
pcm is on a stock tune. i ran it before with the A4 (tuned & stock) and never had a problem? now i swapped to the M6 on a stock tune, and it did that. and it wasnt pinging....it was stumbling. bad.
Immediately after swap the PCM is still trimmed for the old
MAF and the new one is making the mixture computation
too lean. Eventually it would learn out the error in the
closed loop regions (leaving WOT and throttle transitions
as possible trouble spots).
I think an auto will "hide" stumbling more than a manual
because of the fluid coupling's smoothing effects and the
higher rotating mass.
MAF and the new one is making the mixture computation
too lean. Eventually it would learn out the error in the
closed loop regions (leaving WOT and throttle transitions
as possible trouble spots).
I think an auto will "hide" stumbling more than a manual
because of the fluid coupling's smoothing effects and the
higher rotating mass.
