Lean idle when going to closed loop fueling

Holden/Delco Tuning. ALDL, OBD 1.5. Circa 1989 to 2004.
Wade
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Re: Lean idle when going to closed loop fueling

Post by Wade »

There’s really quite a numbers of changes from l36 to l67 and even from auto to manual. Swapping auto to manual should be pretty easy as you can load your bin and then a vy manual bin and do a compare. From memory I think iac, idle and even some timing changes from auto to man just to name a few. Tip in bump spark and adaptive spark and whole heaps of things would be different from n/a to supercharged as well.
Nesr
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Re: Lean idle when going to closed loop fueling

Post by Nesr »

Wade wrote: Tue Nov 05, 2024 9:13 am From the Quick Look I’ve had there’s a few things that don’t look right. Not sure if your running the l67 injectors but the injector data ain’t correct either if so
Yeah i am fixed that up but yea im still stumped with it not idling at what i want to in closed loop
Wade
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Re: Lean idle when going to closed loop fueling

Post by Wade »

thats the rough differences i can see. im sure theres probably more. ive copied over what i could see are different from auto to man, and n/a to supercharged
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Wade
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Re: Lean idle when going to closed loop fueling

Post by Wade »

this is an adx i added some things too, maybe it might help
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Nesr
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Re: Lean idle when going to closed loop fueling

Post by Nesr »

Wade wrote: Tue Nov 05, 2024 10:39 am thats the rough differences i can see. im sure theres probably more. ive copied over what i could see are different from auto to man, and n/a to supercharged
Cheers bro :thumbup:. weirdly enough my wb is reading 16.X but moves with my NB. NB are reading around 450mv so spot on. but when for example going into power enrichment the gauge reads pretty much bang on with what i've calculated using PE spreadsheet. Do you reckon my NB might be inaccurate n replace them?
Wade
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Re: Lean idle when going to closed loop fueling

Post by Wade »

It probably wouldn’t hurt to replace any sensors your suspect on. And a little bit of maintenance goes a long way 👌
immortality
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Re: Lean idle when going to closed loop fueling

Post by immortality »

Are both NB sensors reading the same? do they swing rich/lean about the same amplitude and rate?
Nesr
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Re: Lean idle when going to closed loop fueling

Post by Nesr »

immortality wrote: Tue Nov 05, 2024 11:51 am Are both NB sensors reading the same? do they swing rich/lean about the same amplitude and rate?
yea that’s the weird thing. they both read the about the same swinging from 200mv to 900mv. wb will bounce around n hit 14.7 but then instantly back to a learner value. sorta seems like it thinks 15.7 is 14.7
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pman92
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Re: Lean idle when going to closed loop fueling

Post by pman92 »

Where is the WB mounted?
Do you have an exhaust leak throwing off the WB?
Nesr
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Re: Lean idle when going to closed loop fueling

Post by Nesr »

pman92 wrote: Tue Nov 05, 2024 8:31 pm Where is the WB mounted?
Do you have an exhaust leak throwing off the WB?
a bit before my cat. I wouldn’t say so because when in PE i had it set for 11.5 n showed 11.7 n when in open loop idle fueling was bang on 14.7 so i’m pretty sure it’s pretty accurate