Startup Issues Blueprint 427 2014

[alastner]

Any help would be greatly appreciated. Engine will not start during cranking I have a feeling the injectors are not firing for some reason. the engine does run it will run if I spray the smallest amount of starter fluid while cranking and will run just perfectly fine after that. No DTC'S I will attach both the log and tune. any input would be great and I can let you know if I have tried it already. Thanks!24-09-09 14-14-21.hpl68 camaro.hpt

[gtstorey]

Do you really think this is "off-topic"?

Post in the appropriate GM, Ford, Dodge.... forum for the ECM/PCM that you are using if you want very much help. And include a lot more details of engine build, fuel system, sensor, etc.

But it is probably a wiring problem or vats on a swap.

[Alvin]

I'll bet this is a swap.

Make sure it's gettin fuel pressure and holding it while starting.

Also another common issue I'll see on swaps is the IGN isn't hot in "START" on the key. Does it sorta pop off when you lift off the key from start.

[alastner]

fuel pressure holds steady increases a few pounds during cranking.

I have verified the voltage at the key. also had a buddy who has done some ls swaps verify I haven't crossed or had a wire in the wrong place. He checked at the key too but I can reverify.

It will rarely sort of pop of after letting off the key. just cranks.

I'll bet this is a swap.

Make sure it's gettin fuel pressure and holding it while starting.

Also another common issue I'll see on swaps is the IGN isn't hot in "START" on the key. Does it sorta pop off when you lift off the key from start.

[gtstorey]

fuel pressure holds steady increases a few pounds during cranking.

I have verified the voltage at the key. also had a buddy who has done some ls swaps verify I haven't crossed or had a wire in the wrong place. He checked at the key too but I can reverify.

It will rarely sort of pop of after letting off the key. just cranks.

Not sure that buddy who has done some ls swaps means a lot since the various ECM require power in different places. Do you have the wiring diagrams from your ECM donor?

[alastner]

ls7 6.2 427 believe its a E67 or E78 ECM returnless holley filter Gm performance harness
1968 Camaro with new body harness

[alastner]

its a Gm performance harness brand new engine no donor vechicle i do have a schematic for the ECM

[alastner]

the log file has the voltage reading under cranking if that helps that i attached.

[gtstorey]

The ecm needs voltage in several different pins on most GM ECMs. I don't know which pin it looks at for voltage reading from.