Hey guys, I'm in need of a list of prom #'s--all the stock GM #'s.
I had a site book marked--but it's no longer available.
Also--can someone tell me what chip this is?-ACXS 1088.
I need a stock chip for an 89 350 tpi w/3.27's and an auto.
Thanks alot.

 

anybody?

 

This is the website I have, but have found others.

http://www.cruzers.com/~ludis/p4xref.html

This is probably a more comprehensive site

http://www.diy-efi.org/gmecm/

 

Thanks! That's what I'm looking for.
Question now--I think this is my prom # but it lists it for other applications--like a 4cyl. Is this true?
I have a stock prom from my 86 305 tpi, auto w/3.27's--my 89 has the same thing except for the 9th inj(86), vats and it's a 350.
Think I could use the stock 86 prom for my 89 application? Or do I have to get an 89 specific chip?
This is what it says:
1227165
16198259
Schematic

Application: 1986 2.0 L4 TBI “P” LQ5 w/ MT
1986-89 5.0 V8 TPI “F” LB9
1986-89 5.7 V8 TPI “8” L98
1987-91 truck 2.5 L4 TBI “E” LN8
1991 truck 2.5 L4 TBI “A” L38
MEMCAL IDs: “P”: CRY, CRZ, …
“F”: AUM, ACXT, AKFM, AKFR, …
“8”: BUA, AANK, AANL, APYP, APYU, AUJM, …
“E”: ADHF, AMJW, ASWY, AXAA, …
“A”: AUXH, …
EPROM type: 27C128

Thanks for the help.

 

btt

 

WTH are you trying to do ??

 

I'm trying to find out if my chip from the 86 tpi has the cold start injector, it's a 305 and has no vats-would start my 89-that's a 350, no cold start injector and has vats. I'm still trying to chase down my no start problem. I think it might be the vats-but I'm not sure. I have fuel pressure--and spark was present for a few cranks then just dissappeared! I haven't had a chance to put another coil to test it yet(has an Accel in it). I know if the vats doesn't see the right resistance it'll cut something out so the car won't start--thought it was the fuel tho.
So...would the 86 chip work in my 89? Just to make it start--not run-just start it up?

 

Could be way off base here, but the 86-88 programming may be a -lack- of cold start programming, and the 89 has it. Remember the temp switch in the front of the tpi base is what makes the 9th inj. run IIRC. The 86 PROM should run the 89, but it won't start as well as it should.

 

Guess it isn't the prom--I tried putting it in but it still won't start!
Gonna try tto replace the coil-it's an Accel.
Anyone have trouble w/the remote Accel coil? This will be my 2nd one(if it's bad)