NJR Racing
15+ Year Contributor
- 77
- 0
- Aug 8, 2003
im trying to tune my car but no matter what it runs lean at 5500 and above...i dont get my logger til the end of the week but when i had it on a dyno my a/f went from 11.5:1 to 12.5:1...and thats with 15psi...i turn down the boost to 10psi and still same thing.....i have change my fuel filter...i have 550's with the walbro 255lph hp...my afc setings for high is from -5% to 0%......my question is has anyone ever brought a new 255lph and it went bad quick......for some reason it loses pressure at top end.....oh yeah i have it rewired and have the stock fpr.....any info will help......
