7.3 no start

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Apr 18, 2015 | 06:11 PM

altonlee

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7.3 no start

I have a 1997 F350 7.3 with standard xmission. Have not messed with it since Oct of last year. Then it would crank but no start. Now when I turn the key there is no wts or nothing the gauges move, and tach moves when crankng, but nothing else.

The cam and crank pos sensors have been changed. The high pressure sensors changed. Now when I hook it to the AE it says cannot connect to truck.

Any one know where I need to start? Have checked all fuses that I know about.

Thanks

Alton

Apr 18, 2015 | 08:41 PM

F350-6

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From: Texas

Check fuse #30 again. Unplug the fuel bowl heater and replace the fuse. See if the WTS light comes back and you can connect AE after that.

May 2, 2015 | 08:52 AM

altonlee

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got the wts back, and ae connected but no codes.

The injection control pressure reads 2561. at crank, no electronic pressure control. .20 electronic pressure control volts. Rpm's 113.00

Still no smoke.

anything else to look for?

Thanks
Alton

May 2, 2015 | 09:22 AM

jhl3

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From: Asheville-where weird is

What is your battery voltage and have you checked to make sure you are getting fuel into the heads?

May 2, 2015 | 09:05 PM

altonlee

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Not sure about fuel to the heads but there is 25 or 35 pounds at the fuel filter.

The batteries are fully charged, there is 12 volts on the red wire at the pcm. I am down to the diode is bad or the pcm on the trouble shoot guide. The pcm was only 2 months old when the truck quit running.

Not sure how to test high pressure oil on this thing. The AE does not have a hpop sensor reader on it.

May 2, 2015 | 09:16 PM

F350-6

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From: Texas

ICP is the HPOP pressure. How long does it take to build up to 2561 psi? What does the ICP duty cycle % (IPR) do while cranking?

25 - 35 psi at the fuel filter is a little low, but the truck should still start up at that point. Is there any chance there is a rebuilt HPOP in the truck?