should ltrims go lean or rich with throttle?
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TECH Junkie
iTrader: (71)
Joined: Mar 2002
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From: East Brady, Pa
should ltrims go lean or rich with throttle? My ltrims tend to go leaner with more throttle. Is this normal? Someone posted that they should go richer and this was a sign ofa vaccuum leak. I have all bolt ons with FTRA and ported maf ends.
TECH Apprentice
Joined: Jan 2002
Posts: 364
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From: Princeton, IN
Re: should ltrims go lean or rich with throttle? I would watch your strims, but from what I have seen my ltrims go rich when I let off the gas but only for a few seconds, now when you hit the gas the ltrims might go up a little but they should go down (maybe just a few percent) if you have vacuum leak your ltrims will go lean way lean when you hit the gas. The fact that you have un metered air entering the motor. Had the same problem (it was my egr that goes in to the intake) at idle my ltrims where 3% rev the motor 15%+. What happens is the maf tells the computer that you have x amount of air coming in so it injects the needed amount of gas for that air.
If you have a ported maf you might have a problem like this. The sensor is calibrated for the screen and the ends.
If you have a ported maf you might have a problem like this. The sensor is calibrated for the screen and the ends.
