Ok, where's your ignition timing set? 10* BTDC w/ spout removed?

 

Yes, I have done everything possible

 

What were you doing when it started this? Was it gradual or sudden?

 

You didn't accidentally fill up w/ E85 or something, did you?

 

Check the conector to the #3 injector , you can switch the #3 injector with another & see if the miss follows...

 

it never has ran right sense i rebuilt it. I bought a truck for the motor and tranny and the other parts i needed to swap. ran fine when i bought it. i just tore it down and rebuilt it all. I only have 200 miles on it.

 

never thought of that, i'll give that a try.

 

no we don't have that were i live, i run 93 in everything i own

 

That truck pulses 4 injectors at a time. 2 left, 2 right. Every other rotation.

 

Was it running properly before you rebuilt it? Did you add a big cam or change the initial timing?

 

yeah it was fine, i drove it. no big cam, i put new timing set it. I do no for a fact that it's not off a tooth, we check 3 or 4 times rolling to motor over and the marks were lined up

 

It's not backfiring or anything, just going lean & skipping? Here's a silly question, you don't have a couple plug wires crossed somewhere, do you?

 

no it don't backfire, and no wires are crossed

 

what transmission is in it, what came in it, did you change the harness & ECM, etc.?

 

it's 5 speed, and i had the truck the motor came out of, i used the harness and computer.