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Old 11-01-2008, 04:59 PM
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long cranking to start

1996 ford F350 7.3 The truck will start every time but only after cranking it for about 10 seconds.

There are no codes coming up ont he computer.

I have noticed that the injectors are not firing for the first 10 seconds and as soon as they do the truck fires.

Glow plugs, relay, hpop, pcm, fuel pump have all been replaced very recently.

Any ideas?
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Old 11-01-2008, 05:11 PM
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batteries??
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Old 11-01-2008, 09:18 PM
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No batteries are good and cranks fast the injectors are not starting until the 10 seconds of cranking
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Old 11-01-2008, 10:01 PM
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crank position sensor
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Old 11-01-2008, 10:46 PM
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[CPS has been changed as well
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Old 11-01-2008, 11:19 PM
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How many miles? HPOP may be taking time to get the pressure up. Needs 500-550 psi before the computer turns on the fuel.
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Old 11-03-2008, 09:53 AM
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Check your flex lines (rubber or synth) in the fuel route. I know that with old Jeeps, if you have a cracked hose or a rust hole in a hard line, that will allow the fuel to bleed down, keeping the thing from starting up right away (or staying started, with older carbureted units) because the fuel isn't right there and ready to go. Just a thought.
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Old 11-03-2008, 06:12 PM
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Sounds to me like the HPOP is bleeding off.
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Old 11-03-2008, 07:04 PM
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id check the idm,injector driver module.
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Old 11-05-2008, 06:54 PM
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injector o-rings, the top o-ring will go out and let HPO to blow right past. you have to have aleast 500 psi of HPO to start
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