Interesting read on chips: http://www.gearhead-efi.com/Fuel-Injection/showthread.php?8359-Moates-sst27sf512-price-increase The Boosted NW Chip...

Ok, so I did a bit more testing. I removed the PROM altogether (left in the adapter and the piggybacked memcal) and ran the car and had the same...

Thanks for your response! Removing the adapter and reinstalling the memcall does resolve the issue. The orientation is the same as the image you...

Does installing the original Memcal, without the adapter board / new chip, cause the error? I'm guessing no. If no, then the error is being...

I'm testing using tunerpro to stack the bin as well, and getting the exact same results. I'm starting to wonder if the PROM is maybe backwards,...

It's a 27SF512 PROM and the offsets are: Buffer 0000-3FFF Chip C000-FFFF Thanks!

What offsets were used when the chip was burned?

Here is a thought: do I need to do something with the checksum or Prom ID? I've read that I may need to set the Prom ID to aa to disable the prom...

Has the new sensor arrived and have you installed it? Interested in how all of this plays out.

Came across another vehicle that uses an otherwise unused pin - 4WD Montana, Venture, and AWD Rendezvous use C1 pin 74 as a PWM output for the...

Here's a 6.0 with 4L80E Express 2500 van 7603 OS VIN 1GCGG25U441181668

You're very welcome. There are disassemblies on the page linked above. here. As Dave W noted, the filenames that start with B are actually $D8. ...

im down in the south west corner near green river

I'm unsure what you're asking. This picture shows waves similar to what the GM REF and EST will show if scoped while the engine is running. The top...

I’m hoping to get back into the garage tomorrow after work. Thanks for the pointers, I’ll update when I dig in again.

Thanks for the info 1project2many! Where did you find this? What you said seems to check with what I could see in one of the bins I found, but I'm...

if you have injector pulse and fuel pressure and spark it'll start or at least sound like its almost going to start. you're missing one of those...

Interesting... $85 / $D8 have the ability to guess at which sensor type is installed. The data word at $0043 contains a status bit for the type of...

I really appreciate it. I ended up talkin with a guy about my situation and back in the woods he had a 93 4l80 so the trans shop is getting the...

Years ago coolant in the opti was considered leading cause of death. I've disassembled opti then cleaned and dried everything inside and sometimes...

Technically there are two definitions. The XDF is used for tuning, for changing what's in the .bin file. There's also an ADX which is a definition...

You are correct, sir. Thank you for the correction.

When you order ECMs from the parts store they don't come with the MEMCAL or PROM, so you would still need to source that and/or program your own...

Just want to nip a possible point of confusion for anyone new to the GM ignition... You have your REF and EST wire colours backwards. Purple/White...

Here is a link for eliminating the passkey. https://newrockies.com/ I have not used their product myself but I have heard some good things about...

I checked the chip for any bent or burned pins before installing it so I am confident that is OK. I will do the reset, test it and report back...

Get a good tune on your L31 and it will run great. The L31 is a torque monster where you spend 95% of your time driving. The LS engines are weak...

Unsure of which transistor you are talking about. I think you are talking about a workaround for the antitheft?

Yeah I bet it makes a big difference. What I should have done was put a LS motor in it instead of a crate vortec when I replaced it a few years...