Bought a car hauler, got a Fbomb

[doc_rock]

and that's how the story goes. - like 10 years ago, just now deciding to stop fighting EFI and learn how to work on it.
Been playing with the diesels, decided to try out the old technology. Got a steep learning curve.

1990 IROC-z, yellow dash and all, 355 with LT4 heads, a T56, and all sorts of parts that were never designed to go on this car. Has a custom BIN burned in 06 by.. Somebody .. whoever JM is. It doesn't seem to like the manual transmission, and I don't know where base timing is supposed to be, and.. well.. yeah, I just have to figure it out.
Won't run on any of the stock BIN files, I tried three so far.
I'll be back later, let me go break something.

[dave w]

What EFI computer are you using? The 1990 IROC-z would likely have been the 1227730. The good news, the 1227730 has very good support: http://www.gearhead-efi.com/Fuel-Injection/showthread.php?394-1227727-1227730-ECM-Information-8D

dave w

[doc_rock]

What EFI computer are you using? The 1990 IROC-z would likely have been the 1227730. The good news, the 1227730 has very good support: http://www.gearhead-efi.com/Fuel-Injection/showthread.php?394-1227727-1227730-ECM-Information-8D

dave w

Affirmative, 1227730 ANJF on the case. Currently has a UV EEPROM on the board (I don't know if that's stock or not) and a sticker on the chip that says JM B012 355-tpi-730 6-5-05

I am about to burn the S_AUJP v6 to a chip and see if it'll start.

[doc_rock]

What EFI computer are you using? The 1990 IROC-z would likely have been the 1227730. The good news, the 1227730 has very good support: http://www.gearhead-efi.com/Fuel-Injection/showthread.php?394-1227727-1227730-ECM-Information-8D

dave w

annnnd here's where we get stuck. Every bin file I've loaded on three different chips does the exact same thing.
I got to get smarter to figure out where to start.

[dave w]

There are challenges with erasing and burning chips. The original '7730 chips are 12.5 volts. I'm embarrassed to ask, you know how to correctly identify pin 1 on a 28 pin chip? If your using a 27SF512 chip, it needs to programmed with an offset. The original '7730 chip is 32K, the 27SF512 is 64K.

dave w

[doc_rock]

Don't be embarrassed. I'm an IT project manager, we are literally designed to both ask stupid questions and give stupid answers.

Now we're getting somewhere. I vaguely remember reading that now that you mention it - but honestly I've read so much in the last two weeks, I bet I couldn't successfully program a coffee pot to turn on at the moment.
OK. Pin 1 is in the same spot as cylinder 1, if the notch on the chip is the water pump - right?
And I think you're telling me the chip is loaded FILO, and I have to start at the 32k mark and load middle to back?
So should I be starting in 000020?

Edit: I'm programming 256b chips - that should be 32k.
AT29C256

[dave w]

Image of pin numbering below. The AT29C256 is 32K, so programming goes from address 000000 to 007FFF.

dave w

15628

[doc_rock]

Image of pin numbering below. The AT29C256 is 32K, so programming goes from address 000000 to 007FFF.

dave w

15628

Yep, so all that is right. re-burned a second chip, checksum ok, installed, same thing. Misfire, won't rev, won't idle, won't stay running, but no SES.
It will run OK on the original memcal, won't run at all on anything I've burned.

[doc_rock]

and everything i'm reading says these chips are 5v only.
So - what chip should I buy?
I can't imagine 5 different .bin files all run the thing the exact same way - when everybody else is using them. So that usually only leaves user error.
(No I have no idea what I'm doing)

[In-Tech]

what eprom programmer are you using?

[dave w]

Interesting information, "runs OK with Original Memcal".

I have the equipment to erase and reprogram Original Memcals. I've been thinking you have similar capabilities to erase and reprogram Original Memcals?

Pics of your setup would help clarify what help you need.

dave w

[doc_rock]

what eprom programmer are you using?

Moates Burn 2, and Moates Flash & Burn
Also have the Moates G1 memory adapter

[doc_rock]

Interesting information, "runs OK with Original Memcal".

I have the equipment to erase and reprogram Original Memcals. I've been thinking you have similar capabilities to erase and reprogram Original Memcals?

Pics of your setup would help clarify what help you need.

dave w

Sorry. I thought I clarified, but I think that's actually in another post in the GM EFI forum. My mistake.

All Moates stuff ; Moates Burn 2, Moates datalog cable, Moates Flash & Burn software, and TunerPro editing/logging.
I have the Moates G1 so I can keep cold start and limp home, and am trying to program the EEPROM chips and use them instead.

I say "runs OK" as in it runs the same with the original memcal as it did before. It still has no power, runs rich, loses timing, turns fans on at odd points, and thinks it's an automatic.

[dave w]

I think a few things need to verified. Pictures really help!
Is the Memcal correctly installed onto the G1 adapter? (backwards installation is a real possibility)
Is the chip correctly installed into the G1 Adapter? (backwards installation is a real possibility)
Is the Burn 2 correctly configured for erasing and programming the AT29C256? (incorrect configuration is a real possibility)
Was the AT29C256 correctly installed in the Burn 2 when programming the chip? (backwards installation is a real possibility)
Was the AT29C256 correctly indexed in the Burn 2 when programming the chip? The Burn 2 is capable of programming chips with 32 pins. (incorrectly indexing the chip into the Burn 2 is a real possibility)

Moates.net support link for the G1: http://support.moates.net/g1/

dave w

[doc_rock]

I think a few things need to verified. Pictures really help!
Is the Memcal correctly installed onto the G1 adapter? (backwards installation is a real possibility) Yes
Is the chip correctly installed into the G1 Adapter? (backwards installation is a real possibility) Yes
Is the Burn 2 correctly configured for erasing and programming the AT29C256? (incorrect configuration is a real possibility) Yes
Was the AT29C256 correctly installed in the Burn 2 when programming the chip? (backwards installation is a real possibility) Yes
Was the AT29C256 correctly indexed in the Burn 2 when programming the chip? The Burn 2 is capable of programming chips with 32 pins. (incorrectly indexing the chip into the Burn 2 is a real possibility) Yes

Moates.net support link for the G1: http://support.moates.net/g1/

dave w

Here's a pic of the setup. Marked yellow on the notches so you can see them a little better. The only thing not showing is the MEMCAL installed on the G1, it's back in the car - but I know it was installed and right, it's the only thing that was working (Cold start and LH)

[dave w]

I've only used the Burn 2 with 27SF512 Chips. Maybe try using a 27SF512 chip with offsets? http://support.moates.net/programming-chips-using-offsets/

Figuring everything Memcal and chip wise are correct, the .bin file programmed into the chip might be the next thing to verify. Possibly post the .bin file your using?

dave w

[stew86MCSS396]

Are you just overwrting the bin to the EEPROM? Try if you haven't erase the EEPROM, followed by a blank check, load file to buffer then program chip . gl

[doc_rock]

S_aujp v6, with the manual transmission flag set.

[doc_rock]

Are you just overwrting the bin to the EEPROM? Try if you haven't erase the EEPROM, followed by a blank check, load file to buffer then program chip . gl

No sir.
Steps like this:
Erase
blank check
erase
blank check
blank check
load into buffer
copy
verify
verify
verify

[dave w]

I have not looked at the .zip file posted above.

I've attached a modified factory .bin file to see if it helps. Mostly replacing the 5.0 liter parameters with 5.7 liter parameters.

dave w

[doc_rock]

I have not looked at the .zip file posted above.

I've attached a modified factory .bin file to see if it helps. Mostly replacing the 5.0 liter parameters with 5.7 liter parameters.

dave w

OK. I'll try this out tomorrow evening.
Few dumb questions:
Is the EGR disabled in this BIN?
Is VATS disabled?
How much of a difference is there between a stock 5.7, and a 355 with aluminum LT4 heads and a mild cam?

[dave w]

The EGR and VATS have been disabled in the Modified .bin file posted above.

The LT4 is an OBD2 file, so there is a staggering number of differences!

dave w

[doc_rock]

Ok. Progress at least. That bin file runs better than any other I've loaded to this point. It idles rough, at around 650rpm, like it has an extremely radical cam. It will rev past 3500 in neutral and under a load to redline, which is all improvements over the previous bins. But won't idle with the air conditioning on, shuts off when you push in the clutch, and still has misfire and sputter throughout the rpm range though at different points in the Rev range.
So at a minimum I know I'm loading the bins right and installing chips right.
This bin appears to have more power, though it still bogs bad on a high load low rpm rev. It doesn't smell nearly as rich as it did, and I don't have faint black smoke out of the exhaust that I did have. No ses light...
Thank you Dave. Now I know at least the setup I have is working and loading different tunes properly.

It's acting like not enough timing still, but I know base is set to 10 degrees - this motor won't run at 6 degrees long enough to set the base timing that low.
So many things to investigate, and not sure where to go first...my original chip still runs the best overall, but it's a long way from right.

[dave w]

I would say you have "book ended" one end of the long list of challenges; "Now I know at least the setup I have is working and loading different tunes properly."

Link to other stock factory TPI .bin files: http://www.gearhead-efi.com/Fuel-Injection/showthread.php?394-1227727-1227730-ECM-Information-8D

dave w