Bad ECU

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Nov 28, 2022 | 06:57 PM

espop125

Thread Starter

Racer

Joined: Aug 2007

Posts: 370

Likes: 6

Bad ECU

Hi all I have a 1986 corvette with no injector pulse. After testing several things and then rechecking them again as per factory service manual it leads to a bad ECU. Now for the issue. Nobody has any for sale and I need to get recommendations on a rebuild service. I don’t know which ones I search are reputable. Any help would be appreciated. Thanks.

Nov 28, 2022 | 07:55 PM

Prime Target

Drifting

Joined: Nov 2009

Posts: 1,465

Likes: 309

From: Murrells Inlet, SC (formally New Windsor, NY)

Try Mirrock Corvette for a used one first. Looks they have an 86 coupe they are parting out...

https://mirrockcorvette.com/

Nov 28, 2022 | 08:50 PM

espop125

Thread Starter

Racer

Joined: Aug 2007

Posts: 370

Likes: 6

Thanks I am sending email asap.

Nov 28, 2022 | 09:52 PM

1985 Vette

Instructor

Joined: Oct 2018

Posts: 225

Likes: 81

From: Vancouver, WA

1986-1989 Corvettes used the same ECM, so you don't have to just look for an 86. You might check our local AutoZone or Oreilly. I was able to get a rebuilt one from Oreilly a few years ago.

Nov 29, 2022 | 08:22 AM

MatthewMiller

Le Mans Master

Joined: Aug 2015

Posts: 6,113

Likes: 1,994

From: St. Charles MO

SIA Electronics in IL seems to have a good track record for testing and repairing ECMs. If it's the ECM, it may just be the injector driver on the board that's bad, and I bet that can be fixed.

Nov 29, 2022 | 03:42 PM

espop125

Thread Starter

Racer

Joined: Aug 2007

Posts: 370

Likes: 6

Thanks, I have been looking for all years still no luck.

Nov 29, 2022 | 03:43 PM

espop125

Thread Starter

Racer

Joined: Aug 2007

Posts: 370

Likes: 6

I will call sia electronics. Thanks

Nov 30, 2022 | 04:21 PM

johnfin

Drifting

Joined: Jun 2012

Posts: 1,391

Likes: 73

So is the 85 ECU different from the 86 and if so how do you know you are getting the right one from a parts store like rockauto or...is it just the eprom that makes it work for the car. ie the circuit boards are the same for all early injected C4's?

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Nov 30, 2022 | 04:50 PM

RWDsmoke

Drifting

Joined: Jan 2005

Posts: 1,354

Likes: 325

From: San Antonio Tx

You don't say where you are from. I have a couple of spares. If you are in the San Antonio area I would let you try before you buy.

Nov 30, 2022 | 05:14 PM

#10

espop125

Thread Starter

Racer

Joined: Aug 2007

Posts: 370

Likes: 6

85 is different from 86. To be sure get the part number off if your computer but it is well documented on the internet what the part number are for all different years.