Quote:
Originally Posted by DSM_PWR
I've been having this SAME exact problem for two months now and STILL cant figure it out..
Ive dont boost leak tests, Changed/gapped plugs to .26-.28, converted 2gmas to MAFT setup, swapped out BOVs, and still keep getting the "hit the brick wall" feeling...
My car seems not to do it by boost, but by RPM range..
in 1st i can go all the way to 6k rpm
2nd i can go to 5k rpm @ 19psi
3rd i can hit 4500rpm at 14psi
When i do feel fuel cut the boost just drops down about 3-5psi... increases and fuel cuts again...
A/F ratios are 10:9-11:5 across the RPMs..
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For starters, not sure what you guys are using for boost control but try going ahead and taking your boost controller off the car. Run the line from the boost source, straight to the wastegate. Do that and see if it helps any. Heck, I had to do it myself yesterday to keep my car from sputtering (think I was running too much boost and was blowing out my spark I guess). I'll be putting it back on sometime later.
As for the GM maft, do you have any lights blinking on it? DSM_PWR, is your afr's getting leaner as you get to higher rpm's?