EBL tuning DFCO
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Car: 1988 Formula Firebird
Engine: 5.3 LM4
Transmission: 4L65E
Axle/Gears: 3.42 True-Trac
EBL tuning DFCO
So I've been getting my tune pretty well dialed in on my new engine, but one thing that has bugged me, even when I had the 305, is that when I let up on the throttle (low rpm 1500 give or take, throttle now closed) My Wideband just goes pig rich (10.5-11.5).
What is the table id use to lean this out? This is in open loop if that makes a difference.
What is the table id use to lean this out? This is in open loop if that makes a difference.
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Car: 1988 Formula Firebird
Engine: 5.3 LM4
Transmission: 4L65E
Axle/Gears: 3.42 True-Trac
Re: EBL tuning DFCO
Interesting, So im wrong in thinking the computer is actually dumping fuel in when I let up on the throttle?
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Re: EBL tuning DFCO
With TBI atomization is compromised. two injectors spraying on the circumference of the TB bore I wonder how many molecules are successful in avoiding the intake runners sides into chamber? At part throttle I bet 75% are on the runner and then being sheared off. Watch the MAP when you lift throttle is will spike to full vac. Wont take but a split sec to dry runners off.
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Car: 1988 Formula Firebird
Engine: 5.3 LM4
Transmission: 4L65E
Axle/Gears: 3.42 True-Trac
Re: EBL tuning DFCO
Well when I lift the throttle, it shows 0 MAP, and the AFR stays on the rich side for quite a while. usually stays rich until I get back on the throttle.
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