92RS-HeritageEd

iTrader: (2)

Can anyone tell me a list of cars/trucks that would have the PROM for my 92 RS L03 w/ 700R4 and your opinions on which would be best? Also, Can PROM's go bad and just fail?

Tuned Performance

iTrader: (92)

It’s very rare for a prom to go bad. The 1228746 ecm was used on 89-92 f body’s and I’m not sure what year but it was used on the b body with a 350 automatic.
I think the latest tune was the axkt for your application.

Tuned Performance

iTrader: (92)

https://m.ebay.com/itm/89-92-Firebir....A0.H0.Xa.TRS0

92RS-HeritageEd

iTrader: (2)

Thanks a million, any insight on what makes/models I can snag one from? Such as C/K 1500 trucks, s-10's, caprice's, etc...

Tuned Performance

iTrader: (92)

The programming language is different. You could use a truck 1227747 from a 305 tbi automatic truck. But the prom on the link is cheap . The symptoms of a bad prom is rapidly blinking check engine light. I’m not sure on your ecm If code 41 or 51 would show.

92RS-HeritageEd

iTrader: (2)

Went out to a local JY, they ran the 1992 Camaro RS 5.0L V8 through interchange applications for ECM's and came back w/ same year range Chevy Caprice. They had a 1989 & 1990 on the yard. Checked them out and the 1990 (VIN # 1G1BU54E6LA117153) was complete with a nice shiny 1228746 so I picked it up.

Anyone know the difference in the "tune" of the ATYR & the AXKT PROM's?

Tuned Performance

iTrader: (92)

Atyr will work it’s for a 305 tbi automatic. I don’t have that file to do a file compare.

92RS-HeritageEd

iTrader: (2)

I've run the ATYR PROM and yes the car's derivable but that's it. I ended up ordering the AXKT PROM as you suggested, made the seller an offer of $19.99 and the seller accepted. So once it arrives I'll install it so I can at least know what the true factory tune performs like.

In the mean time, I did put the HyperTech HYP-122362 PROM back in (the newest 1228746) along with a 160 degree thermostat... runs noticeably different until code 44 pops, then performance takes a nose dive but that's another topic.

Tuned Performance

iTrader: (92)

92RS-HeritageEd

iTrader: (2)

I have not...

RBob

iTrader: (1)

ATYR is for a Caprice, which is why it is lame in your 3rd gen.

Code 44 (O2 lean) can be the sensor or a failing fuel pump. It could be something else, such as the hypertech chip, Does the code ever pop up with the Caprice PROM?

RBob.

92RS-HeritageEd

iTrader: (2)

Yes that code popped no matter what ECM/PROM combo was in use...

92RS-HeritageEd

iTrader: (2)

*SOLVED*

Picked up a AXKT 1113 at a local yard today. It was pulled from a 90 RS w/ VIN # 1G1FP23E1LL130325. Total cost $0.00, cost was "included" with the Instrument/Gauge Cluster I snagged for $35.

So now that I have the Stock PROM, and another AXKT 1113 on the way that i'll keep as a spare I do consider this thread/matter resolved.

Thanks everyone!