https://www.ebay.com/itm/164044316810

This Is a great solution to Gen3 GM obd1 TPI programing

I used it on a 383HT with Tuned port.
The unit has been modified to use the P4 and there is an additional ADC channels that have been routed through the ECM connectors as well.
The unit comes with the cables and 1 modified 7733 ECM and a extra unmodified 7733 ECM
https://www.dynamicefi.com/EBL_P4_Flash.php This web site will explain the system

 

https://www.thirdgen.org/forums/engi...permitted.html

 

go ahead and delete it

 

Will this ecm work with a 1989 L98 Corvette?

 

what ecm is in trhe l98?

 

I think you need a flash 2 instead of a p4 in place of the 1227165. But you can repin and use the maf wires for the 1227730 ebl p4.

 

I think it is a speed density only

 

My 1989 L98 has 88999194 ecm.

 

I think this is the one you need

https://www.thirdgen.org/forums/engi...h-ii-port.html