Does anyone know if the chip from a 92/93 caprice TBI 350 will fit the computer in my 91 RS? ( I know the chip is different) I am swapping my 305 TBI for a 350 TBI (probably a caprice crate engine) and i thought I might be able to use the GM chip out of a caprice. Are the computers the same except for the chip? Thanks for the help....bob

 

The 92/93 350 Caprice uses ECM 16135320 or 16136965. Your car runs the 1228746 ECM. I doubt the 92/93 eprom will run in your ECM.

The 89/90 350 Caprice uses the 1228746 ECM. It's possible you could run the 89/90 eprom. I haven't tried it so I don't really know.

IMO, to really make everything right, you should get the 350 knock sensor and ESC module from the Caprice also.

Above info is from: http://www.cruzers.com/~ludis/c3xref.html

 

Brent, thanks for the response. Nothing is easy, thats for sure. I was looking to run the 16220837 SEO chip from a 92/93 caprice.
How would I find out for sure if it would fit my ECM? This is stupid, but I gotta ask,
is changing the ECM a big deal? Does it involve a wiring harness? Thanks for the help...bob


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91 camaro RS convert
t-5
open element air cleaner
TBI spacer
Flowmaster muffler

 

How would I find out for sure if it would fit my ECM?

The only way to find out is to buy it (the SEO eprom) and try it.

is changing the ECM a big deal? Does it involve a wiring harness?

I don't know anything about the wiring for the 92-93 ECMs. The only way to find out is to get the wiring schematics for both your car and the 92-93 Caprice and compared them pin for pin.

Might be a very steep learning curve for ya, I don't know how much you know about ECM's EFI, wiring and electronics.

The easiest route for you IMO would be to try the 89/90 350 Caprice eprom.

 

Brent, thanks again. Steep learning curve is
a polite way to put it! I don't know jack about this stuff, other than what I have read here.thats why I want to stay with a stock chip...bob

------------------
91 camaro RS convert
t-5
open element air cleaner
TBI spacer
Flowmaster muffler

 

Brent or anyone else, i noticed that the 1228746 ECM (91 TBI 305 F body), the 16135320 and the 16136965 ECM's (92-93 TBI 350 caprice) all run 2732 4 Kbyte E-proms.
So, why wouldn't an E-prom from a 16135320 or 16136965 ECM Work in a 1228746 ECM assuming the motor application was right?
(I know I can try it, but I don't want to do the swap and find out it doesn't work and have to end up with a custom chip that may or may not work)

I got just enough info to make a fool of myself but what do you or anyone elso think?....bob


------------------
91 camaro RS convert
t-5
open element air cleaner
TBI spacer
Flowmaster muffler

 

The chip will fit physically, but the EPROM programming varies from ECU to ECU. There's a good number of ECU's that use the 2732 EPROM chips, each ECU type, however, has its own unique "program" on the chip.

-Mark W.
'88 SC Camaro w/ 305 TBI