Lean when braking
#1
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From: Montreal, Qc, Canada
Lean when braking
Ive installed the wideband and tuned the car now it runs in the 12s almost all the time. I see 12.6-12.8 very often, sometimes 13.0-13.1 (rarely). I set the rail return style with an FPR set to 50 psi.
Only problem is that when braking, the AFR goes to 17:1, sometimes 18. Could it be how my PCV valve is setup?
BTW, the car is MUCH faster now, probably as fast as it can be with the stock 240 exhaust system. Top end is nuts.
Only problem is that when braking, the AFR goes to 17:1, sometimes 18. Could it be how my PCV valve is setup?
BTW, the car is MUCH faster now, probably as fast as it can be with the stock 240 exhaust system. Top end is nuts.
#2
I presume you are off the gas when braking. When decelerating like that (no load), you are in open loop and IPW is reduced, so of course it will read lean. That is normal.
My PLX displays AIR on the screen when I am decelerating.
My PLX displays AIR on the screen when I am decelerating.
#6
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Originally Posted by nismology
Hehehehe...I figured you'd already know that JClaw. But yea, what they said. Injector pulsewidth is drastically reduced when coasting in gear.
The source for the brake booster vaccum line is directly in the plenum, drilled a hole with a fitting on the side of the intake.
#7
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From: Montreal, Qc, Canada
Originally Posted by eng92
I presume you are off the gas when braking. When decelerating like that (no load), you are in open loop and IPW is reduced, so of course it will read lean. That is normal.
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