Thread: EFI Tuning
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09-30-2011 06:33 PM #6
After I had the fuel map sorted out I was still getting some occasional "stutter & pop" during acceleration. I started watching the O2 display and the handheld LED's closer, and what I found was that I was going lean when I hit it, but it recovered within a second or less. The map was good, but my "accelerator pump" curve was too lean, even though I had steepened the curve a bit, maybe 5% earlier in the day. I picked up that handheld unit while on a test drive, dialed it to "Transition Fuel" and added fuel until it stayed just below mid 14's on throttle action across the range - I could not believe it wanted 20% more fuel in transition! Backed the macro correction out of the handheld calibrator, and went back to the curve on the laptop and added 20% through the idle and mid-range and the stutter & pop was gone! HOORAY!! Today Edelbrock sent me a new Crank Fuel curve to try, and that seems to have solved my starting inconsistencies. Now if I can just keep my hands off of those curves......Roger
Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.
Nice time despite the run arounds they put you guys thru
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