New engine wont start

[Dave884x4]

1988 s10 blazer 2.8 4x4 automatic


i just upgraded to a 3.4 v6, all machine work done, engine has all new internals. I have spark, i have fuel, but it will not start. I have checked the timing over and over, it is fine. I need a checklist or something to look for, all sensors seem to be hooked up and it still wont fire.

[MT-2500]

Originally Posted by Dave884x4

1988 s10 blazer 2.8 4x4 automatic


i just upgraded to a 3.4 v6, all machine work done, engine has all new internals. I have spark, i have fuel, but it will not start. I have checked the timing over and over, it is fine. I need a checklist or something to look for, all sensors seem to be hooked up and it still wont fire.

Have you set the dist rotor to No. 1 spark plug with engine TDC compression stroke or dis you get it on exhaust stroke?
What is the compression on engine?

[Dave884x4]

I set it on the compression stroke. I have not checked compression being it was a professionally built engine I assumed it was safe to skip that step. I feel the compression fight me when I turn the crank. It pops through the throttle body like a back fire sometimes. I tried another distributor thinking it may have gone bad but not change. I also checked the timing chain thinking I may have installed the timing set wrong but it was correct.

[MT-2500]

Originally Posted by Dave884x4

I set it on the compression stroke. I have not checked compression being it was a professionally built engine I assumed it was safe to skip that step. I feel the compression fight me when I turn the crank. It pops through the throttle body like a back fire sometimes. I tried another distributor thinking it may have gone bad but not change. I also checked the timing chain thinking I may have installed the timing set wrong but it was correct.

If popping back threw intake.
Double check firing order and dist./rotor /dist. cap/wires.

[goiserclause]

Any info on that 3.4? What year is it? What was its intended application?

[Dave884x4]

it was from a 95 Camaro. I have tried 2 caps, new wires, new rotor another distributor as I said before and plugs as well without change.

[MT-2500]

Originally Posted by Dave884x4

it was from a 95 Camaro. I have tried 2 caps, new wires, new rotor another distributor as I said before and plugs as well without change.

Have you got proper fuel pressure and good gas and spark to all plug and compression?
Correct firing order?
If s then it should start and run.
Will it fire with a squirt of carb cleaner?