Craig0320
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V8 Engine Swap
TRS 20th Anniversary
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- Mississppi
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- 1998
- Make / Model
- Ford
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- V8
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Good info and I really appreciate it. I want to purchase withing the next couple of months. I am still trying to find out if my eec-v explorer pcm is supported.true going a little leaner will improve fuel mileage, but to get repeatability just leaving it in closed loop control but maybe moving the rich/lean point (be it in VE table or however it is in, I'm sure I'll find out soon enough, I'm going to go the same route with a tuner within the year most likely) is much better than trying to get it to run in open loop... the normal narrow band oxygen sensor only knows that the system is rich or lean not the actual AFR so for the most part you just get to modify how long it stays rich or lean (to keep a catalyst working efficiently the fueling is switched between rich and lean to get some extra fuel and oxygen mixed in the cat for it's reaction to work)
What you've seen are reasonably safe numbers, running lean and or too much spark advance makes for a more knock sensitive system, higher cylinder temperatures and pressures increase preignition.
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