99 ,CC Short Bed won't start. Looking for tech help.....

[SCOTI]

My new DD won't start.

You can hear the fuel pump run. I have 54-56psi @ the test port. I have spark. If you give it a small shot of starting fluid, it will fire & run.

Without the starting fluid, it won't run. We replaced the fuel pressure regulator thinking maybe something was going on there. Didn't help. No codes when scanned.

Suggestions?

[Gunner41]

454?

[SCOTI]

5.7

[HeavyChevy81]

Ive seen a no start issue with 50-52 static, but really figure you have enough. But, Vortecs seem to be very picky on fuel pressure for starting issues. Im thinking you are looking at a new fuel pump, even though pressures are very close to being in spec. Hard call, I think you are on the right path replacing the regulator, but Im thinking the pump is next. Im curious to the board, why are Vortecs so picky on fuel pressure? And it seems if outside specs, it just wont start, or even try?

[SCOTI]

Ttt....

[Gunner41]

I know the feeling about having to replace the regulator. When I replaced my regulator I installed a new rail as well. Of course along with that I replaced the pump and filter. Figured since I had both the manifold and bed off might as well. I have not had a problem since. I would of replaced the injectors but the stealership was well just that and because I live in California it seems smog just gets in the way again.
Was not anything else left but it does work well.
Good luck

[Cyphercrash]

Originally Posted by HeavyChevy81

Ive seen a no start issue with 50-52 static, but really figure you have enough. But, Vortecs seem to be very picky on fuel pressure for starting issues. Im thinking you are looking at a new fuel pump, even though pressures are very close to being in spec. Hard call, I think you are on the right path replacing the regulator, but Im thinking the pump is next. Im curious to the board, why are Vortecs so picky on fuel pressure? And it seems if outside specs, it just wont start, or even try?

Vortec I own has Plastic upper intake plenum covering a single spider with the fuel injectors as a single unit. The plenum also has vaccum holes that require weird sized o rings. The Spider is generally the no start issue if there is Pressure for the fuel line. Bad design.

P0300 most common, GM answer in the Technical Bulletin states use top tier gas. DO NOT use injector cleaner as the plastic is adversely effected (yes plastic injectors)

[SCOTI]

I finally found the Delphi kit.... But it was $600 w/the new/different retaining bracket.

The weird thing is the Delphi set-ups I found came w/a 1yr warranty. I decided to go w/the BWD upgraded electronic injector module instead. The module assembly, gasket, & bracket was $340 & came w/a limited lifetime warranty.

[Cyphercrash]

That's where I am at after upper motor rebuild. Every now and then she just does auto drive.

[SCOTI]

It was a mechanical issue. There is one wire w/a clip that exits the wrapped bundle going to the injector module. I went back in to fix a leaking/missing O-ring @ the fuel lines (using a flashlight/in the dark). Apparently upon reassembly of the air intake & TB hat, I managed to rake this wire forward. I guess it was sitting there until the throttle plate was opened just enough. Once that happened, it dropped in & when I took my foot off the pedal it wedged itself in place.

I inspected things this AM & noticed right away the throttle plate cracked open & then saw the wire/clip. I pulled it out, secured the wire to the bundle, & everything is back to normal.

[Cyphercrash]

Glad to know you're all locked down and good. Keep on truckin