[XfireZ51]

Originally Posted by Paul Workman

Ummm-yeah. Had that thought too when I read 410-420. Mine was initially set by Marc for ≈ 450 hp before I ported the heads. I had no SES. Logically speaking, it would seem (to me too) that one possiblilty might be a lean condition???

Dom, we're starting to think alike...AND DON'T THINK I'M NOT WORRIED!!

p.

Well if the SES light comes on then then goes off during hard acceleration, that usually indicates an intermittent lean condition. Now WHY its lean is a matter for discovery. I had that happen when I ported my top end. Turned out to be fuel pump.