We're all broke now-a-days it seems. I was poor yesterday, i'm poor today, i'll be poor tomorrow. Oak Creek drive on 89 is a beautiful drive!! Love driving that way up to Flagstaff.
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We're all broke now-a-days it seems. I was poor yesterday, i'm poor today, i'll be poor tomorrow. Oak Creek drive on 89 is a beautiful drive!! Love driving that way up to Flagstaff.
deal. get back on subject of tuning. when you were saying earlier about the 7747 being off by one ..... something, i forget now, but what do you mean by that? what's off compared to the 8747?
edit: byte word. that's what it was
It was the ADX file. $4F and $42 will work on each other.
Which is $4F = 6 1ST TIME IDLE FLAG 0 = FIRST TIMEQuote:
NOTE: THIS DATA STREAM IS ALMOST IDENTICAL TO DATA STREAM A33 -WITH THE EXECEPTION TO BYTE 1 BIT 6 DEFINITION.
Which $42 is = 6 HIGH BATTERY VOLTAGE
So I just copied $42 adx and changed that byte... to make $4F adx
there's some extremely smart people out there to understand and change that stuff around. nice work to everyone that helps us, no so smart, folk out :thumbsup:
Yeah really! We'd be screwed if it were up to me! :laugh:
I just got involved on the ADX files while Robert WENT ON VACATION without teaching me first!!! :mad1: Luckily he left behind enough for me to learn and reverse engineer. So if I can keep up on these he can put real talent to good use!
ok, so i did a 7747 stock 5.7 truck bin burn. pulled my old chip out, put in the newly burned chip, and instant flashing CEL. Limp mode from the first start up, i guess there's other things that need to be done to get a 7747 bin to run properly in a 8747 ecm.
Sounds more like a bad burn or wrong offset or chip leg bent or install backwards... did you read the other thread? Pretty sure he used a 7747 bin and worked...
http://www.gearhead-efi.com/Fuel-Inj...o-1227477-swap
i have read that one over and over :thumbsup: i was thinking it would be pretty straight forward after reading it. i may have an issue like you posted with the chip. on that other thread, did he just run a 7747 bin in a 8747 ECM, the way it's writen it sounds like he used just the wires and connecters from the 8747 and just plugged them into a 7747 ECM, not just burning a 7747 bin into a 8747 ECM... that make any sense? i'll have to take a better look at the chip and make sure it was seated right too. i think its time to order a few more chips from moates...
He is now using a 1227747 ECM just plugged in the 1228747 harness! But earlier IIRC he used a 7747 chip successfully as well. Jim_in_dorris had looked up wiring harness details for us and mentions specific changes as we did not have 1228747 Wiring Diagram.
If any one has a 1228747 Wiring diagram we need one!!!
ok, well i will certainly try burning another chip. making sure my offsets and everything match up correctly
I switched from a 8747 to a 7747 with no wire changes direct swap. The only issue i have is with my temp sensor and O2, nothing to do with the 7747 ecm.
FYI- I did try running a 8747 stock bin with the mask ID set to AA, in the 7747, still got the blinking CEL.
Sorry it took so long to find this thread. i guess i was too busy, turning and burning.
8747 computer stopped working all together, 7747 plugged in an.d ran with 7747 bin. I tried a 8747 bin in the 7747 just as test. It didn't work.
Using AA for a mask id, disables the checksum function, old jedi tuning trick I read some where.
well that makes sense now. i'll have to try to burn another chip when i have time and test it out again in the 8747 to make sure it's the ECM to chip failure and not just the chip i burned.
disabling checksum does what exactly to an ECM?