the ECM in my '86 IROC died today, I have a complete TPI setup from an '89, can i swap ECMs and use the PROM from the '86 in the '89 ECM without trouble?

I know the '89 has VATS but isn't that coded into the PROM not the ECM itself?

thanks,
Colin

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Webmaster: www.IROC-Z.org

 

Check to make sure they both say 1227165, but it should certainly work. VATS is a function of the programming, not the hardware.

 

thanks man

i'm happy about that because I definitely need to get this car running, it died on me on the way home from getting some supper last night, had to walk over 3 miles home

i'm sure it's the ECM, the check engine light was flashing in time with the missing of the engine and then it just shut off.. i can crank it and it will fire but it will not idle, runs very rough and the check engine light will flash off each time the car stumbles and flash on each time it catches..

the lights both in the gauges and the headlights don't dim while the car is missing so i know it's not a ground..



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Webmaster: www.IROC-Z.org

 

any 1227165ECM should work. When you get the new ECM and the 89 has the same combo that you have EG: 305 Manual, 350 Auto, 305 Auto, try and use the 89 chip, it should work. I am much (MUCH) happier with my 89 chip than my 86 chip.

If I am incorrect by saying this, please don't hesetate to correct me.

John



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87 Formula Yellow/Black
Engine & Transmission
.040 over 5.0 converted to TPI, 9.5:1 Compression, SLP Cam Dur 206/212, Lift 480/487, Cent Line 112, SLP headers, SLP cat-back exhaust, K&N Airfilter, Modified Stock cold air intake, Ported & polished Stock TPI intake, Holley Adjustable Fuel Press regulator, AC Rapidfire Spark Plugs.
Gil Younger (no yo-yo) Shift Kit, Aluminum Driveshaft, 3.73 Posi gear
Suspension & Brakes:
Baer 12" brakes 4 wheels, KYB AGX Adjustable Shocks & struts, Hotchkis strut tower brace, South side machine frame connectors, Custom reinforced control arms and pan hard bar.
Interior:
Custom Leather interior, CUSTOM Yellow Gauge Faces, Kenwood Receiver, Pioneer Speakers, Kicker Substations, Kenwood 10 Disk Changer, Pioneer Amp.

87 Formula TPI (5 Speed) Yellow/Gray STOCK

1967 Buick Riviera 430hp Turns high 14's (Not bad for 4300 lbs)

83 Camaro (Parts)
83 T/A (parts)

http://www.3rdgenformula.com

 

just one question about that..

wouldn't the VATS programming interfere?

i know the '89 chip would be superior because of deletion of the cold start injector..

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Webmaster: www.IROC-Z.org

 

Thats correct. The VATS would prevent your car from starting. The 89 code is expecting the signal from the VATS module.