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'Vehicle Controls & Special Functions' button, up on the toolbar.

Aww, does somebody need a cuddle and/or a nap? Here, I will loan you an emotional support monster. She's not as ferocious and scary as she likes to think.

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If you are logging the things...

But, I had an '80 Malibu with the old pellet-bed converter on it and that one picked up big time when I cut it off, therefore, I cut the cats off everything I own to this very day. There are some...

So start a new thread with this new, unrelated problem, and attach your tune file in the ECM when the problem happens, and a log file showing it happen, like you have to do with anything like this...

Posting the tune file would be a good start, I guess.

Why is it so lean? What's the fuel pressure?

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And hell, one that kills the battery overnight is an easy one. Big draws are easy to find. The hard ones are where it only dies if it sits for 4-5 days, or only does it intermittently. If you're...

Open all doors and trip the latches, so the BCM thinks the doors are closed. Then you can still access the insides without waking anything up. Hood switches can be tied down, etc.

Pulling fuses...

Cool story. No files posted.

Those things are true but again have nothing to do with open loop or using a wideband to tune the non-PE/non-OL regions.

Sure they would. Depressing, but they would. Or at least some of them would, enough that you could play subscription tricks or price-over-volume tricks and make lots of money off the suckers. Look...

Speed density and open loop are unrelated. Closed loop with trims active and no MAF/speed density works great.

KOEO, apply vacuum to the MAP sensor while watching it in the scanner. Like you'd do to sweep a TPS. Make sure the scanner reading matches the gauge at various points.

The log shows it's idling at...

When it goes to shit at hot idle or whatever, if it's because of low condenser airflow the high side pressure will be too high. If it's because of low refrigerant charge, high side pressure will be...

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HPT will, as long as you're talking only the TCM (not a Gen 4 ECM), either T42 or T43, without even costing any credits as long as the file you're writing to it is already licensed. Or a Gen 3 PCM,...

Yessir, non-EV conventional fan clutch as used on 2008 & 2009 TBSS. Direct swap with the EV clutch, just disable the fan controls DTCs in the tune.

The fans I mention are brushless, variable...

'08-'09 had a conventional fan clutch.

https://www.rockauto.com/en/moreinfo.php?pk=1793422

50 bux.

If you do go electric, I can't tell you how nice the SPAL brushless fans are. C7 Corvette...

How many times has the system been opened, if you know? It's real common for guys to follow instructions that tell you to add X amount of oil when replacing components, even if there was no oil left...

At idle? Would you not be able to see a fuel pressure gauge when it's parked and the hood open?

Your injector data matches the first revision of the conversion I did. The one in the spreadsheet in my signature is slightly refined, but isn't enough different anywhere to cause what you're...

It's easier to help someone who knows nothing but is aware that they know nothing, than it is to help someone who knows a whole bunch of shit that's all wrong.

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'Max all of it out' means put in the biggest number the table allows, NOT put in a number three times bigger than what the table allows.