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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-25-2005, 11:05 PM   #1
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Default Computer swap?

On my '87, i want to swap the chip from another 3.8 into it that has performance programming in it that i got for nothin. It'* the whole computer with the chip still installed. So a few questions. Where is the computer located in my car, and would it be better to just swap in the whole computer or just the chip? The computer i have is a factory GM police package out of an olds. Sounds weird i know but i checked it out. Thanks.
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Old 01-25-2005, 11:42 PM   #2
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hmm computers aren't too backward compatible for these years. If you have an '87, i think not much more than another '87s would swap right in.

I'm not an expert in this field tho, someone else?

i do know that the '87'* transmission is absolutely non-computer controlled.
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Old 01-26-2005, 12:35 AM   #3
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Well it came from an 87 olds so it'* fine. I know the tranny is fine too. i really just need to know where the computer IS in my car.
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Old 01-26-2005, 12:43 AM   #4
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isnt it up under the dash by the front passenger wheel? if you popped your glovebox down, and looked straight back to find a friggin huge wad of wires going to a box, you have found the computer. right?
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Old 01-26-2005, 01:07 AM   #5
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Ya you should just have to empty your glove box and pull out the insert and that should expose the PCM.
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Old 01-26-2005, 07:46 AM   #6
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'87 olds may have an LN3. Olds was a year ahead of every other car with their technology. They had the LG3 in '86, L36 [i think] in '91, etc.. I am not 100% sure though. If you can go back to the car and check what kind of engine it has, that would be better. Make sure it has the Ignition sitting on the intake, NOT mounted to the alternator, or that it does NOT have an engine cover, etc... I am sure you can tell the difference.


-justin
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Old 01-26-2005, 10:00 AM   #7
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A quick look at the AC Delco page shows only code "3" engines for Olds in 1987. While the Quad-4 was an Olds engine, the 3800 has always been a Buick and they tend to lead in engine changes for that platform.

Looking a little further, the earliest use I see for a "dual ring" crank sensor ("C") is 1988.
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Old 01-26-2005, 11:14 AM   #8
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Well i have the engine from the particular car that the computer came from, it'* identical. It'e great because i have a whole parts motor in the shop for mine, only it has the internals of a GN motor (without the turbo of course). I've been saving it for anything that i may need if and when i blow the motor in mine. I think we're gonna have a few slow days in the shop for the rest of the week so i'm gonna bring mine back in and swap the computer and bleed the brakes that i've been putting off for a week and a half. Thanks guys.
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Old 01-26-2005, 06:03 PM   #9
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Quote:
Originally Posted by opensourceguy
'87 olds may have an LN3. Olds was a year ahead of every other car with their technology. They had the LG3 in '86, L36 [i think] in '91, etc.. I am not 100% sure though. If you can go back to the car and check what kind of engine it has, that would be better. Make sure it has the Ignition sitting on the intake, NOT mounted to the alternator, or that it does NOT have an engine cover, etc... I am sure you can tell the difference.


-justin
you mean L27
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