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95 7.3 diesel. Idling rough. Pulled a code saying "injector

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control pressure out of range...
95 7.3 diesel. Idling rough. Pulled a code saying "injector control pressure out of range low". Replaced the IPR already. Bad ICP?
Submitted: 6 years ago.Category: Ford
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Answered in 8 minutes by:
3/25/2011
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 6 years ago
Tim Mohr
Tim Mohr, ASE MASTER TECH
Category: Ford
Satisfied Customers: 16,103
Experience: 30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
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Hi, my name is ***** ***** can be caused by a bad ICP or a weak high pressure oil pump, when did this start and when did you repplace the ICP?

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Customer reply replied 6 years ago
I replaced the IPR. Not the ICP. I just replaced it last week. On idle the RPMs will jump bout 50 RPM. When stoppingand the truck down shifts it'll draw the RPMs down to round 300 for a second before it'll jump back to round 650. Doesn't happen all the time. But has been happening more and more. The truck has new injectors and HPOP lines less then 10,000 miles old
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 6 years ago
then you most likely have a weak high pressure oil pump, the high pressure oil pump controls the injector pressure, you will need to check the pressure with a gauge, it needs to get to 725 psi within 6 to 15 seconds of cranking, if it does, then replace the pump,Tim
Tim Mohr
Tim Mohr, ASE MASTER TECH
Category: Ford
Satisfied Customers: 16,103
Experience: 30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
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