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Look up “diagnostic fuel pressure gauge”.

Fully to the floor when starting cuts off fuel so not sure why you went “almost”.

There is a tune repository with only stock tunes accessed through your account on HPT site (not this forum).

You need to look up DTC's in the exact OEM Service Manual for your particular vehicle. If it's a swap, needs to be looked up by the ECM calibration.

Part numbers eliminate the ambiguity. Tuning is mostly about the details.

For anything beyond wild guesses, LOG and TUNE needed. And more details about any modifications to the vehicle. But a lot of this doesn't match my understanding of how things work, especially the...

You may want to check your voltage at the sensor key on engine off and do the math. If it works that way, check the wiring.

If I did the math correctly, the values I posted will give you 88.614 kpa. What altitude are you at?

Theoretically, 3 Bar for the same application should have the same values, but it seems like the sensors for old applications are all over the place. If the values I posted don't work, you may have...

Just because a sensor is a 3 Bar (or 1-2 Bar) doesn't mean they have the same values.

Edit: Just noticed your post count, so you probably already know this and I misread your last post.

As edcmat-l1 says, larger injectors are like filling a shot glass with a fire hose.

Those part numbers don't show up with a search on here and they don't cross reference with anything that will have a tune that HPT will have been able to read.

But I did find this. I can't open...

Map Part number?

And when I said diagnose as a no crank, that goes way beyond starter and starter signal.

Still can’t be done with HPT. Since the HPT tune won’t contain the throttle control segments.

HPT doesn't read the throttle control segments so if it truly empty it would have to be programmed with through GM website with no HPT tools.

But I still don't believe it is empty.
For everyone...

To me 10% is excessive, I would rather keep it below about 5%. Get more logs on long, typical drives and see what it does.

Still might be a power issue. The ECM might not even be awake or powered up. Forget the tune and start by trouble shooting this as a no crank. Unless you know of something that happened, just setting...

No matter what tuning you do with the wideband, if you run the vehicle in closed loop it's going to be using the narrowbands anyway so you might as well adjust it so the closed loop tuning is closer...

No, you don't want to write a file from the repository to your ECM. At least on a lot (most?) of GM's.

But way too soon to think that the ECM is shot.

And do you have any version of your tune?...

What makes you think the last file loaded onto the ECM isn't there?

I don't think adding any fan to 50+mph will make a difference.

Fuel Injection Clinic or Fuel Injection Connection?

Attach the data sheet.

HP Tuners included those tables for a reason, so I'm going to change them.

Really, it's usually all related, you just don't realize how.