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You cannot have P0101-103 set to No Error, those tests must run AND FAIL for it to be in SD. If there's no MAF and SD is disallowed, = no run.

Sensors are probably nuked from running stupid open loop for so long.

Please post your after-segment-swap file. Sometimes weird stuff happens when swapping one with a COS applied.

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Why is Bank 1 stuck rich all the time, not switching? Do B1/B2 go to ~450mV when unplugged?

All the 5vref pins come from a common supply on the board inside (I believe it's only the later ECMs that have multiple 5v rails), so unplug both connectors and check continuity between all the 5v's...

It was DBC from stock, if it didn't have traction control. It has no changes from my stock '02 Suburban L59 4WD file and System Options: ETC = 0 like it should be.

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Your Cylinder...

No boost, but there is vacuum. Hooking up the line will let it drop fuel pressure when engine load is low (low MAP/high vacuum). Lower pressure allows a wider window for pulsewidths at idle. Injector...

By the way, this is not how you turn off stuff that's no longer present:

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Unchecking the box only stops it from turning the light on, it still runs all the diagnostic tests and takes all...

Open Loop Mafia, then? I'm out. Best of luck on your travels.

Man, you are really behind the times. You need to take some lessons from the business school/private equity playbook. What about... IaaS - Injection as a Service? Sell the hardware, then require a...

12216125, not whatever it changed into after the COS.

You should really have dedicated channel lists depending on what you are trying to do - diagnose a no-start? tuning spark? idle tuning? VE tuning? dialing in the speedo?

Speed Density Air Mode enabled/disabled is not the same thing at all as a speed density custom OS. There is no SD OS available for your year.

Why do you think you need that, anyway? What are you...

Searching '4l80E' and 'segment swap' will give you lots of stuff to look at. The settings you can see and make changes to in the HPT Editor is about 10% of the actual code in the PCM. The base,...

Where. Is. This. Tune. File. That. You. Have. Questions. About.

This goes a lot faster with a tune file to look at. Nobody can see what you see without the file(s), nobody can spot and then point...

How did you convert it from 4L60 to 4L80, just flipping the Trans Type switch? No segment swap?

Oh, never mind. 'TBSS' intake, so I assume it's a stock single-inlet returnless rail? What did you do with the rest of the fuel system? Is this a swapped vehicle?

If it still has the original 2002 L59/'Z' fuel rails & regulator, your fuel pressure should be 51 PSI KOEO, all the data in the spreadsheet is for 58 PSI. That's not why you have a no-start, though...

So you're saying that someone edited the VIN/serial to intentionally make it look just like one that's got a problem?

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This one appears to be stock...

https://www.ebay.com/itm/305562769842

The sucky thing about these Galaxies is they're rear steer, oil pan clearance is a whole bunch of not fun.

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Are you now, or have you ever been, a Fiero owner?

Oh. Well never mind then.

There isn't just one, that engine RPO was used in several different platforms and a MAF table has more to do with the intake plumbing than the sensor itself or even the engine.

https://forum.hptuners.com/showthread.php?95427-Fuel-pressure-sensor-doubts&p=673286&viewfull=1#post673286