Does my truck have a computer?
 

1986 Silverado, 305, Quadrajet Carb, Auto, and Bone Stock. I've always thought that this truck had a computer but I am being told that it only has the ESC spark control and that it is not really "computer controled". Is this correct? thanks.

Re: Does my truck have a computer?
 

I think the Computers were Calif only :waah:

Re: Does my truck have a computer?
 

I have an 86 Silverado with a 400 sb and Q-jet in it and mine doesn't have a computer on it.I don't think they came with a computer till 87 but I could be wrong.

Re: Does my truck have a computer?
 

Check behind the glove box. If you see a box bolted to the underside of the dash you have an ECS "computer". Another sign is a vacuum switch on the passenger side near the A/C box.

Re: Does my truck have a computer?
 

You can also look on top of the carb. If it has a 'BLUE' solenoid on top and the distributor has a 4 prong plug instead of a VAC ADVANCE, then yes, your truck has a computer.
-Lance

Re: Does my truck have a computer?
 

Yes, I do have the ESC computer and I understand that this device is to control the timing to prevent detonation. I think mine may not be working right and I've about decided to go ahead and disable it. I just wasn't sure if there was a brain in the truck like the newer models that controls everything else.

Re: Does my truck have a computer?
 

No, mine has the tan one and the dizzy has the vac advance.

Re: Does my truck have a computer?
 

Why not just swap it out? I'm sure the local bone yard has 20 or 30 available. Heck, I've got 2 laying around from trucks I've stripped.

Re: Does my truck have a computer?
 

I have one laying around too. ZZ4 does not have an ECS distributor.

Instructions to disable the ECS.
http://www.73-87.com/7387garage/drivetrain/escrepl.htm

Re: Does my truck have a computer?
 

Seems like a good time to cite Swervin's ESC to non-ESC dizzy swap.

on 73-87.com

They're notorious for wigging out, that's why everyone's got so many hanging around.