Quote:
Originally Posted by supremeefi
O.K but you said it would run richer, it won't, not if the O2 has enough room to correct.
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well, it will run richer during warm up, cold start, and any open loop areas. That's also a big "if" on if there's enough room for the O2 to correct. Should be I agree.
We're not disagreeing, just playing semantics. My point was raising the fuel pressure will affect the a/f and I would re-tune to compensate to get my trims back in line and to get my cold start and open loop areas back where they need to be. But you are correct in that there
should be enough correction available in the O2's to at least keep the closed loop areas in line, but again that assumes the tuning is right in the first place. If the O2's are already maxed out or close to it, and are pulling a bunch of fuel in closed loop to maintain the desired a/f then raising the fuel pressure will cause it to run richer then desired all the time...........
I do appreciate your info and feedback.
Jody