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4th Gen ('81-'88): No start Monte Carlo 85 LS 4.3 v6

Old Aug 2, 2025 | 02:13 AM
  #1  
Tufirata's Avatar
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Joined: Aug 2025
Posts: 1
Default No start Monte Carlo 85 LS 4.3 v6

I got this car as a gift from family trying to help me out and also to save it from the scrap yard.

It has a bad gas tank, fuel relay, fuel pump, and fuel filter. I replaced all those. I noticed the fuel line for the fuel vent was clogged but it shot gas out at the fuel filter last things I checked.

It cranks and runs on starter fluid, has great spark and compression from that test.

What my question is, is what could it be? How can I check fuel injectors if they are firing, like it's there a relay for them or fuse and where is that located? Also any photos of what line to check that goes to injectors for pressure/where I would put fuel pressure gauge to check pressure?

Also any insight or ideas welcome and encouraged!
 
Old Aug 2, 2025 | 05:44 PM
  #2  
KCC11's Avatar
Joined: Jun 2025
Posts: 5
From: Cypress, Texas
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First thing to do is get the wiring diagram. Go to the O'Reilly Auto parts web site. Start looking for parts for YOUR vehicle. Then look on the left side for vehicle specs. And you find a copy of the wiring diagram there. Check all fuses and grounds and go from there. Then check the power and grounds at the ecu.
 
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