Studdering with FMU.....?
I just finally got my 42# lightning injectors and matching Pro M in my car and untill I can get my wideband on and tune it, I am using my ATI FMU (adjustable bleed type) My car seems to have a really bad studder between 3500-4400rpm (just building decent boost) and then it seems to clear up and pull to redline. I have been told that it is the FMU causing this I have adjusted it both ways and the problem still exists, any of you guys have this problem? Any idea what else it could be? It will even hiccup through the intake every now and then...
Re: Studdering with FMU.....?
Quote:
Originally posted by SnakeIs
I just finally got my 42# lightning injectors and matching Pro M in my car and untill I can get my wideband on and tune it, I am using my ATI FMU (adjustable bleed type) My car seems to have a really bad studder between 3500-4400rpm (just building decent boost) and then it seems to clear up and pull to redline. I have been told that it is the FMU causing this I have adjusted it both ways and the problem still exists, any of you guys have this problem? Any idea what else it could be? It will even hiccup through the intake every now and then...
What kind of fuel pressure are you seeing under WOT, and at idle? Obviously your gonna need less fp w/ the 42's than w/ your previous injectors.
Whats your plugs gapped at? The added fuel might be drowning out your spark.
just a few things to look at
DAN