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Old 02-10-2008, 04:31 PM
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Let's see if anyone else has had this problem!

I have an 01' F350 psd with 152k on it. It cranks a little longer than it should to start after it is warmed up. If you turn it off and restart it again real quick. It starts like it should, but if it sits for even 5 mins. it takes a little longer cranking before it starts. Even if you cycle the to build fuel pressure it does not help for a quicker start. Now a new problem has come about. When I'm taking off and giving it all she's got it will usually tach out at about 3200 rpms and shift to 2nd. Now it runs up to 3200 rpms and instead of shifting it falls on its face like it is goverened and drops to 2500 rpms with a light shutter until you let off the gas then it changes to 2nd. Then it is fine unless you run it hard to 3rd then same thing. If you never let it get over 2500 rpms it does not have the problem, except the starting problem. I have changed the fuel filter. I have also replaced 3 injectors in it. I think I know what the problem is, but I don't want to say as not to steer anyone in that direction. I am hoping that someone will come up with the same idea as me to prove me right.
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Old 02-10-2008, 04:34 PM
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sounds like a defueling problem. Does your check engine light come on?
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Old 02-10-2008, 04:39 PM
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No, the check engine light does not come on. The truck is stock no mods.
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Old 02-10-2008, 04:41 PM
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Hows your oil pressure? What about your HPOP?
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Old 02-10-2008, 04:50 PM
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Oil pressure gauge in truck reads normal, no way to check hpop pressure.
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Old 02-10-2008, 05:07 PM
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Any other ideas?
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Old 02-10-2008, 05:11 PM
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any codes??

what kind of data monitering abilities do you have?? (scan tools)
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Old 02-11-2008, 02:56 PM
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I have access to a snapon scan tool and have done a cylinder contribution test no problems found.
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Old 02-11-2008, 04:25 PM
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Anyone else want to give it a guess?
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Old 02-11-2008, 04:33 PM
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moniter ICP and IPR (id have to look at my brick to see....i think they call IPR something else....)

your looking for injection controll pressure and injection pressure regulator....

tell me what the ICP is and what the IPR duty cycle (percentage) is when it is long cranking......

If the IPR duty cycle is 85% but the ICP is below 500.....replace the IPR o rings...
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