need help on my first LS conversion,04 LQ9 in an 86 K5, no start

[stevebbc]

Just another piece of info, I have pulled off injector connectors and put voltage to 4 or 5 of them and all have the solenoid clicking if I just quickly touch the negative. So I think injectors are good and not sticking. I've built 7 or 8 motors and tuned a bunch more. (old school)This is a classic timing issue. Backfiring thru the intake and starter is struggling to turn it over.

Thanks

[vortecyota]

Just another piece of info, I have pulled off injector connectors and put voltage to 4 or 5 of them and all have the solenoid clicking if I just quickly touch the negative. So I think injectors are good and not sticking. I've built 7 or 8 motors and tuned a bunch more. (old school)This is a classic timing issue. Backfiring thru the intake and starter is struggling to turn it over.

Thanks

Hmmmm. Strange. You can use any noid light. Just make a couple small jumper wires to attach the pins on the light to the pins in the inj connector. If you think its a timing issue, there would have to be coil control wires crossed up. Im really curious now. I had a cmp connector pinned wrong once and it took forever to start the engine, all the while backfiring. That sounds very similar to your troubles. I doubt you have a ckp problem because you have some spark and fuel. Cmp on the other hand is looking more and more suspect. Keep at it. It'll be worth it.

[stevebbc]

Just put in new crank sensor and its very close to firing up. What is a crank sensor learn procedure? Is it necessary for a start? or does it just improve performance?

thanks guys!