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85 prom in 89 computer

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Old Dec 21, 2004 | 06:35 PM
  #1  
85silverz28's Avatar
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Joined: May 2004
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From: Lake Station, Indiana
Car: 1988 iroc z
Engine: 5.7 liter
Transmission: 700r4
Axle/Gears: 2.77
85 prom in 89 computer

I am haveing a vats problem in my 89 iroc. I have a extra tpi computer out of my 85 z28. Will the prom from the 85 work in the 89. I just dont know if the vats is in the computer or part of the prom. PLEASE HELP.......
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Old Dec 21, 2004 | 08:44 PM
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funstick's Avatar
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From: great lakes
no a 1985 tpi car uses a 1227870 ecm it is a c3 generation in design and uses a 2732 eprom. this is a 24pin memory device.

the 1989 model year ecm is a 1227165 its a p4 generation and uses a 66 pin memcal inside that memcal is a 28pin 27c128 eprom. these are not interchangeable.
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