Intermittent hot start long crank - Ford Powerstroke Diesel Forum
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Old 08-01-2014, 06:39 AM
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Intermittent hot start long crank

This popped up once this past winter when I was in FL with the truck, and hasnt resurfaced since then till this past week.

After a long run on the highway (only happens after towing) of an hour or so is when it happens. Never happens around town, during the day or night, and never when not towing.

Its obviously an HPO leak. But curious on how to find out exactly where.

Last time it happened, we trailered my friends boat up the line to launch in RI to run offshore.
We left at 130am, ambient temps about 70*.
IAT was around 85*.
EOT and ECT were both hovering around 200*.
Stopped for fuel after about an hour on the road.
Truck was off for about 10-15min.
Try to start, cranked for about 2-3 seconds with no response.
I kept cranking and blipped the throttle- she fired up instantly.
I have done this in the past as well if it starts to crank longer than expected, I hold the throttle down a little, and she always fires immediately.

Happened again on the way back.
We stopped for iced coffee after about 1.5hrs.
Same deal, long crank, blip throttle, fires instantly.

My slightly educated guess is one of the dummy plugs or standpipes.
I replaced these when the motor had about 85k, I am at 113k now.
Injectors were new at 95k.
IPR valve and ICP sensor new at 100k.

Whats the best way to narrow down the drivers side or the passenger side for an oil leak?
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Old 08-02-2014, 04:55 PM
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Anybody???
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  #3  
Old 08-02-2014, 05:42 PM
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You've gotta be able to supply air into the ICP port while energizing the IPR valve. Remove the oil fill cap and listen for air on passenger side, remove CCV hose and listen on drivers side and oil filter cap and listen also.
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