Sourcing replacement ECM

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Loudoun_Prime
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Joined: Sat Jun 01, 2019 4:32 pm

Sourcing replacement ECM

Post by Loudoun_Prime »

Hi all, I am told by my Mechanic that I need a new ECM for my 87 B2K. I thought I found a used one on eBay but the seller refunded the money and said the one they had was broken. Any ideas out there where to find one, or if there is a company that fixes them? Or many there’s a more modern way to control the engine? Thanks all in advance!
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undercover
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Re: Sourcing replacement ECM

Post by undercover »

The ECM is standard '86-'89 corvette ECM with a custom prom in it. From your pm, though, I don't think the ECM is your problem.

There are many aftermarket engine control systems that will work with your Callaway, but all of them I've seen result in the loss of the info display (trip computer, etc.).
1987 CTTC conv #147
1987 Guldstrand/Traco Grand Sport 80 #18
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puzzigully
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Re: Sourcing replacement ECM

Post by puzzigully »

I picked up one for my 87 from O'riellys (I think)
You need to change the PROM though

I'm thinking it's unlikely to be the ECM (it wasn't in my case either)
Better to properly diagnose the problem first - why does your mechanic think its your ECM?
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Loudoun_Prime
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Re: Sourcing replacement ECM

Post by Loudoun_Prime »

Well - I ended up finding a used one on ebay for $120. Swapped out the PROM and installed it in my car and it fixed the problem.
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SurfnSun
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Re: Sourcing replacement ECM

Post by SurfnSun »

Loudoun_Prime wrote: Sun Mar 28, 2021 8:16 pm Well - I ended up finding a used one on ebay for $120. Swapped out the PROM and installed it in my car and it fixed the problem.
Good to hear...what was the original problem?
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Loudoun_Prime
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Re: Sourcing replacement ECM

Post by Loudoun_Prime »

Was having trouble controlling the main radiator fan.
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