3000GT/Stealth International Message Center - View Single Post - ---===The Official MAFT-Pro Thread===---

Maximal · 06-09-2006, 10:29 AM

Put in that stock ECU I had and the A/F still fluxuates at idle. I see it anywhere from 12's to 15. Fuel trims are stuck on 100.

Couple things that I think could be causing this... First I have a walbro. I tested the FP after I installed it and the stock FPR seemed to be able to keep up with it. Maybe it can't anymore? But at the same time wouldn't that cause it to read a constant rich A/F ratio at idle?

Secondly I have DR stage 3 heads and street grind cams. My vacuum was lower from those when I tested it last and did fluxuate...would that cause my A/F to be all over the place.

Any ideas on how to fix either of those problems?

Terry

06-09-2006, 10:29 AM	#1072 (permalink)
Maximal Supporting Vendor Join Date: Jan 2002 Location: Painted Post, NY Drives: '91 Stealth "ES" Trader Rating: (183)	Re: ---===The Official MAFT-Pro Thread===--- Put in that stock ECU I had and the A/F still fluxuates at idle. I see it anywhere from 12's to 15. Fuel trims are stuck on 100. Couple things that I think could be causing this... First I have a walbro. I tested the FP after I installed it and the stock FPR seemed to be able to keep up with it. Maybe it can't anymore? But at the same time wouldn't that cause it to read a constant rich A/F ratio at idle? Secondly I have DR stage 3 heads and street grind cams. My vacuum was lower from those when I tested it last and did fluxuate...would that cause my A/F to be all over the place. Any ideas on how to fix either of those problems? Terry __________________