on my F22B2 5th gen and im runnig lean with 440cc injectors and a 255lph intake and my VAFC set at -26% across the board and my plugs are still flaked white. Im back to stock for right now because of some manifold issues BUT i know for a fact the car should run uber rich at these settings. My wideband is not plugged into my sotck exhaust so i cant use it right now but what else would cause me to run this damn lean.

Ive narrowed it down to these:
-ignition is off
-IM vacuum leak
-B&M FPR ******* my **** up


Any suggestions would be very appreciated and i also checked my compression, 180 across the board, so im good there, Thanks guys.

 

What is your fuel pressure at idle??? If your IM had a vacuum leak you would have a surging idle.

 

My fuel pressure bounces at like 40 to 45, even when i am at WOT it doesnt change. A friend of mine ahs the same thing on his DSM with the B&M FPR but he doesnt run lean.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 97F22B2 &raquo;</TD></TR><TR><TD CLASS="quote">My fuel pressure bounces at like 40 to 45, even when i am at WOT it doesnt change. A friend of mine ahs the same thing on his DSM with the B&M FPR but he doesnt run lean.</TD></TR></TABLE>


Try messing with your VAFC more to see if that helps.

 

I know everycar is different but god damn, -26% acordd the board she be swimming in fuel. They have gotten better from when i was at -40% so i changed them again and raised the amount of fuel.

Also ive noticed that sometimes when driving for awhile on the highway and then disengauging the clutch it will idel at like 1200K for a while and then drop little by little likes its warming up.

 

bump