1228747 to 1227477 swap.

Thought i should start a new tread as i'm sure i will have a few question that others might find helpful. After this swap is complete and running properly i will begin the 427 swap.
1989 v-2500 suburban 5.7tbi/TH400 4.11 gears with 1228747

Swapping in a 1227747(asdz) from a 1989 G20 5.7tbi/700r4 2.73 gears.

Plugged in with no wire changes:
Started: OK
Idle Park: good
Idle in gear: OK(could be aftermarket cam)
acceleration: slight stumble on take off
transmission: shifted OK
CEL: NONE
Problem noted:
Transmission kicks down in to low gear at speeds over 30mph. TCC being engaged do to ECU set-up for 700r4
slight stumble win taking off from a stop on low speed.

I opened two TPRT windows to compare a 1988 7747 bin for a 5.7/3 speed auto to a ASDZ bin from this site. I modified the ASDZ bin to the same TCC setting as the same on the 3 speed auto bin.

I have not installed the G2 yet, a little worried about doing it myself. will the above work to fix the kick down/TCC issue.

SOunds like you figured out how to do the bin, what are you worried about? Soldering in the G2?

Quote:

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Originally Posted by EagleMark

SOunds like you figured out how to do the bin, what are you worried about? Soldering in the G2?

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Well i'm hoping it wasn't my solder job that screwed up my 8747.

Did i program this right.
Attachment 1621

Quote:

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Originally Posted by 1leg

Well i'm hoping it wasn't my solder job that screwed up my 8747.

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Me too but stuff does happen...

Quote:

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Originally Posted by 1leg

Did i program this right.
Attachment 1621

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Looks right to me. Here's the Moates offset chart.
http://support.moates.net/2010/04/05...using-offsets/

I got the G2 installed, took it for a drive. No log just wanted to make sure the kick down wasn't getting activated.
Chip using stock BIN but with the TCC set to the same as a 3speed auto bin i found. I had a issue when installing the G2, when removing the pins part of the circuit board mask came of. i had to run a small jumper wire. i should have taking a picture. I did a ohm check and everything looked good.
Started fine
No CEL
Still has stumble off idle
Drove fine for about 1 mile. I was coming to the bottom of the hill and the truck stopped running, I coast it to a pull out area. Started truck up wouldn't stay running unless i gave it gas, then it would surge really bad. Lucky i had a wrench to disconnect batt. the truck started ran fine, took off short time 100 yard started surging. put trans into N to bring idle up still surging. Disconnected batt again. Started up fine got her turned around for the run back home, made it to the top of the hill surging the whole time. Had to do the Reset a few more times before making it home. I never got a CEL when the engine was running.

Do i need to remove the wire at A7 along with the zeroing out the TCC stuff in the bin.

Not sure? If you don't have TCC then no need for wire.

Surging? Don't you have a cam in that that was tuned in other bin? Could be that, don't know why you needed to reset each time though, somthing not adding up. Data log may show an issue. Double checking all wiring since you now have a ECM swap, may need to do something else to bin other than just one item for TCC...

Post up bin!

here's the bin. This is copy from this website, I didn't copy the stock chip yet.

The surging is more like a bucking. almost like the fuel is being cut off then on. No time yet to hook up the laptop for a log. maybe tomorrow.

Well, I did a compare with the .bin I had running in my truck when it had a '7747, and aside from a few small differences, I noticed that the last address L0FFF in yours has $00, in mine it was $96. That is part of .bin that is not user adjustable. Change yours to $96 and try it.

I also noticed that your O2 thresholds vs airflow are a little different, I wonder if your ecm is trying to correct fuel, and the thresholds you have are not playing well with the PID routine, causing the oscillation (surging) to be uncontrollable.

One more thing, you have the engine startup RPM set to 561 rpm. Try dropping that to between 450 and 500rpm.

Thanks, I'm going to try and copy the stock chip tonight and start with it. It ran fine except for the TCC. Could you pm me your bin for me to try. Also not sure how to change that address is do you use hex editer.

Quote:

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Originally Posted by gregs78cam

Well, I did a compare with the .bin I had running in my truck when it had a '7747, and aside from a few small differences, I noticed that the last address L0FFF in yours has $00, in mine it was $96. That is part of .bin that is not user adjustable. Change yours to $96 and try it.

I also noticed that your O2 thresholds vs airflow are a little different, I wonder if your ecm is trying to correct fuel, and the thresholds you have are not playing well with the PID routine, causing the oscillation (surging) to be uncontrollable.

One more thing, you have the engine startup RPM set to 561 rpm. Try dropping that to between 450 and 500rpm.

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that's a lot of things? Maybe that chip is just wrong?

That's not a stock chip.

BCC result page!



BCC used in 1989. (Scroll down for more info)

BCC= ASDZ9578

Scan id= 9501

Part number= 16139577

Release date= 02/02/89

Engine size= 5.7

Trans Type= Auto trans

ECM/PCM: ECM #01227747
Used in trucks:

GMC
Possibly used in:

C1500,2WD,1/2 TON

C1500,2WD,1/2 TON

C2500,2WD,3/4 TON

C2500,2WD,3/4 TON

G10 VAN,2WD,1/2 TON

G15 VAN,2WD,1/2 TON

G20 VAN,2WD,3/4 TON

G25 VAN,2WD,3/4 TON

Options:
Without GU2 AXLE, REAR, 2.73 RATIO

With L05 5.7L GAS 8 CYL (5.7K) V8 TBI

With MD8 AUTO 4 SPD THM 700 R4

With NB2 CALIFORNIA REQUIREMENTS

I tried both of these and I think that AMUR is the one I settled on.

Here's the bin from my Suburban. It has Hiway Lean Cruise enabled so this might not be good if you tow big loads! Also set to kick out if high load, so may be fine? Also has ESC forced knock test turned off so your motor does not have to be forced to knock once every startup cycle. It runs great in my 1990 Suburban 5.7L 2wd 700R4.

I looked at last chip I did for 5.7L turbo 350 and made the same changes... since it's an automatic bin all the IAC logic is correct for auto driving.

I also zipped the $42-1227747-V4.xdf with I think 3-4 changes (like above for turbo 350) to disable TCC, turn off Code 24 VSS, and 2 other bit changes for manual trans. They are all marked in XDF with **OFF** or **SET TO MANUAL** at the end of paremeter name so you can see what I did.

I don't understand what you did for the Turbo 400 kickdown, nor have I ever done that or researched it but you seem to have that worked out...

gregs78cam was posting same time I was getting this stuff ready for you! Ha!

My chip is ADSU hypertech stage 1 I found in an ecm. It has very little changes from stock, believe me I searched it! Then added Hiway and ESC test done. Then was tuned to my Suburban which was mechanically sound. So it should run good with known changes needed for turbo 350 auto trans.