Having a little problem with my lt1 and kinda stuck on what it could be. Ran it the other day to work(20min drive) ran perfect. When i left work tried to start it, would crank but wouldn't turn over so i looked at it today back at my house and noticed no spark and no fuel due to injector failure. The injectors look fine, coils great, everything seems to be in working order at first glance, but before i go checking every little bit someone mention to me earlier that it could be the computer failing? Any ideas or tips of what to look for would be helpful
thanks

 

how do you know its injector failure? could possibly be a pcm gnd.

 

My brothers is doing the same thing. I have done some posting on here and some say it could be a leaky injector causeing the fuel system to lose pressure. It makes since. When your car does start do you notice any blue smoke from the tail pipes?

 

If there is no signal from the opti, you don't get spark or fuel injector operation.

 

clean it, if it doesnt work then its something else. start with the cheapest and simplest and move up.

 

this sounds like what your looking for, the first thing you may want to check is the harness going down to the opti. it starts up next to the intake on the passenger side

 

hmm, ill check the opti, I guess i ruled it out because its almost brand new, less then 1K miles on it, but knowing how sensitive they are i guess it could be.
thanks

 

Before yanking the opti, very the opti cable is making good contact.

 

A simple scan would show up codes if the Opti isn't supplying the high and low res pulse signals. Why guess - scan it.