I installed a 96 lt1 Z28 into my 97 Z28. The computer and wiring was in the car when I bought it non running. I have everything hooked up and it will not start. New opti, new fuel pump 45 psi at the rails. The noid ights are not lighting. I plugged a scanner into the obd11 port and it's reading error in comm can not link...... Is it a bad ecm?

 

Check the cig lighter fuse to insure you are getting power to the ALDL connector.

 

I'l check that, thanks.

 

cig lighter fuse ok and I plugged a cell phone cord to verify power.

 

you need to check and make sure you have power at the injector connectors, it's the pink wire, the pcm grounds to open injectors, there are two 7.5 amp fuses in the exterior fuse box, also look in the in the interior fuse panel for a pcm fuse, it provides constant voltage to the pcm...

 

I will check the wires. What effect does the crank position sensor have on starting.

 

Nothing. It is only used for misfire detection on an LT1.

 

i had an issue like that, car would run but wouldnt flash, sent it to PCM forless and got it socketed.

What happened was I was tuning and the battery cable was loose and killed it.

Jay