89vette

So I have some spare V6 Memcals for 7730 ECM's laying around and I wondered if I could use them. SO I yanked out the factory chip and Soldered in a new AT29C256 and loaded it up with my bin. The car starts and runs fine except I get a Code 41 Cylinder Select Error.

Can I modify this Memcal to work? I just want to modify a memcal to work with my Autoprom. I've done a search where it talks about tying pins together but no detailed descriptions or pictures. I'm not sure which pins these are. It looks like if I am reading it right the pins are numbered 1-66 and go up and down while going across. So the pins to jumper are on the little blue ones under the ESC board?

Thanks

RBob

iTrader: (1)

Tie MEMCAL pin 56 to ground. This sets the injector firing rate. Yes to the MEMCAL pin numbering. 1-2 across, then next row for 3-4 and so on until you hit the other end of the MEMCAL.

RBob.

89vette

Thanks. I just did it and it works great. Thanks for the clarification.

traktormats

Is there a picture of this?
From which side you start counting

Tuned Performance

iTrader: (92)

Bones232

Does this mod work for the 7427 v6 memcal also?

Tuned Performance

iTrader: (92)

I think there is a thread on gearhead-efi regarding the port fuel mod and the 427 ecm