Hello I’m posting again , I’m having an issue that others on ls1 forum have had but not figured out.
My swap starts right away but dies after 1 second or less it turns over then dies. My code reader is only throwing evap codes.
I am using an Amazon standalone harness. I’ve replaced the crank sensor and the engine coolant sensor. If I hold throttle open and spray starter fluid it will not continue to run. It’s like fuel and spark are cut the second it turns over. The rpm’s in my reader drop straight to zero as soon fuel is cut.
My pcm is hotwired straight to the battery to eliminate it as a variable. It has 12v when cranking and in the run position. I have tried with my maf on and maf off. I have fuel pressure at the rail 58lb steady.
I have tested all injectors, I have pulled plugs and watched them spark. What could this be
YES VATS IS DISABLED
I had it wiped off my pcm and have ran it on a stand with the stock harness just fine.
I have remade all the grounds and can’t think of how to land them any better. Battery to block , block to two parts of frame, my Amazon harness to back of cylinder head and frame.
What wiring issue could this be , is it an issue with something mechanical.
My hunch is cam and crank are t communicating and the pcm is cutting fuel but I don’t know how to test this, :(
Should I buy a new cam sensor and see ?