finally taking the plunge to learn the obd1 chip reading and modify

[mike454]

Hey guys,

I'm finally taking the plunge to learn the obd1 chip reading and modifying.

Ive done a lot of factory flashing and tinkered with the obd2 stuff,

But given that we have 4 pre 96 Chevys here at our shop, and I want to learn how to do it myself.
(93 3500 7.4 4l80e crew cab flatbed,93 caprice wagon 5.7 tbi,1992 Buick roadmaster 5.7 tbi,transplanted into a 82 bread truck convertible car show cruiser,
and a 93 gmc 1500 with transplant 93 454 SS truck running gears)


I just ordered the APU1 Autoprom package and and a couple xtra chips and sockets to play with.


I'm sure I'll need little help

Thanks for all the info y'all provide.

[dave w]

I'm sure you will do well with your venture into OBD1 Chip Programming.

Looks like you will have a mix of Chips 2732 (4K) and 27C512 (64K) you will be working with. Do you have UV Eraser for the 2732 chips?

Perhaps converting the 2732 chip to a 27SF512 chip would be a good plan? http://www.gearhead-efi.com/Fuel-Injection/showthread.php?172-7747-Flash-Chip-Conversion-(27SF512)

dave w