96 7.3 no start when hot

CHRISTOPHER_SANDERLIN · Jan 29, 2015

7.3 is having a hard time starting after running for around 30 minutes and then shutting off has a new IPR valve new ICP new crankshaft sensor and injectors. Starts up fone when cold. And runs great just wont restart without wait I couple hours. Any ideas

bruce · Jan 29, 2015

Do you have anyway to monitor cranking ICP? Where did the injectors come from?

79jasper · Jan 29, 2015

Most likely: IPR or injector orings.

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CHRISTOPHER_SANDERLIN · Jan 29, 2015

Oriellys shop Installed

79jasper · Jan 29, 2015

Doesn't mean they're good.
Especially the orings.

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pullandpray · Jan 29, 2015

I had a poppet sick on a brand new injector and caused the exact same issue your having. When it's hot oil thine out enough it wouldn't build enough pressure to start.

Justin@DP-Tuner · Jan 30, 2015

As stated, watch cranking ICP. My bet is injector o-rings. There have been a lot of issues with o-rings, which I believe was due to a bad batch of them being released from the manufacturer (some point early to mid last year). A lot of people are still seeing the effects from this.

bruce · Jan 30, 2015

who reman's o'reilly's injectors? there are some things you just don't buy at generic auto parts stores, injectors are 1

Vengeance · Jan 31, 2015

My bet is on a cut or bad IPR o-ring.

UNLIMITED_DIESEL · Jan 31, 2015

bruce said:
who reman's o'reilly's injectors? there are some things you just don't buy at generic auto parts stores, injectors are 1

Delphi is the company that Remans for O'Reilly and Advance. We've seen a lot of them and we don't accept them as cores. They're worse than Pensacola Diesel.

I would start by looking at ICP pressure, I would also say you either have a bad oring or poppet valve sticking open.

lincolnlocker · Jan 31, 2015

UNLIMITED_DIESEL said:
Delphi is the company that Remans for O'Reilly and Advance. We've seen a lot of them and we don't accept them as cores. They're worse than Pensacola Diesel.

I would start by looking at ICP pressure, I would also say you either have a bad oring or poppet valve sticking open.

worse then penacola? holy chit....

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