1986 Chevy Truck Check engine light but no computer?

Tiny
OVERLORDOFMARS
  • MEMBER
  • 1986 CHEVROLET TRUCK
  • 6 CYL
  • 2WD
  • MANUAL
  • 212,900 MILES
Hello, I have a 1986 Chevy 2500 with the 4.8 L Inline six engine. The check engine light came on but I cannont find the reason. The truck began to idle bad about a week after the light. Here is my problem, there is no code test jack that I can see. I have looked every where under both sides of the dash. I cannot find the typical computer either! What is making this light go on and where is this hidden ECM and test jack?
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Saturday, August 16th, 2008 AT 8:00 PM

3 Replies

Tiny
MERLIN2021
  • EXPERT
Both are under the right side of the dash.


https://www.2carpros.com/forum/automotive_pictures/62217_ecm_1.jpg


https://www.2carpros.com/forum/automotive_pictures/62217_ecm_2.jpg

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Saturday, August 16th, 2008 AT 8:16 PM
Tiny
OVERLORDOFMARS
  • MEMBER
I got your answer but your WRONG, the picture you sent had a fuel injected engine. This has a carb !

It also shows a V8 engine, mine is a streight six engine!

I ripped the glove box out, there is nothing up there but a speaker for the radio.

What is this check engine light connected to?
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Saturday, August 16th, 2008 AT 8:23 PM
Tiny
MERLIN2021
  • EXPERT
E had them under one of the seats, but this is c20, forget about what engine you think the diagram shows, that was not even a consideration fo the part. And if you look close, thats a carb on top!
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Saturday, August 16th, 2008 AT 8:29 PM

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