HPOP Question
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Laughing Gas
Joined: Jan 2012
Posts: 1,103
Likes: 1
From: Lakeland, TN
HPOP Question
My '03 will not start when warm, starts fine and runs well after a cold start. Not sure how long ît may have been going on as most starts are cold for me. The HPOP was replaced 4 or so years ago by the dealer. My mechanic mentioned a ball in the HPOP that was not on later models. This apparently causes an obstruction when warm that resolves when it cools. If this proves to be the problem, he plans to remove the ball and replace it with a pipe fitting to eliminate the problem for good. Does this all sound right?
Thread Starter
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Laughing Gas
Joined: Jan 2012
Posts: 1,103
Likes: 1
From: Lakeland, TN
Hmmm...I'd read that HPOPs rarely fail, and now I've killed two? Is that odd? The truck is 12 years old next week and has 238k miles, so I suppose anything is possible...
Cargo Master
Joined: Oct 2003
Posts: 2,833
Likes: 5
From: Jefferson, Iowa
The 05+ hpops rarely fail. The early ones don't fend as well. I would air test, also check and see what your ipr is at hot idle. I am betting on either a pump, branch tube orings or nipple cup of rings.
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Laughing Gas
Joined: Jan 2012
Posts: 1,103
Likes: 1
From: Lakeland, TN
I'm about to hit the road for a 45 min interstate drive. I'll check IPR at the end and report back. What should it be?
Logistics Pro
Joined: Dec 2004
Posts: 4,138
Likes: 7
From: South Weber, Utah
It should be 22-24% at hot idle in park or neutral.
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Laughing Gas
Joined: Jan 2012
Posts: 1,103
Likes: 1
From: Lakeland, TN
Probably worthless info, but it's 26.4 at cold idle. I own a 2006 HPOP still on my parts donor truck. Are they interchangeable? Easy to remove without damaging it?
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Logistics Pro
Joined: Dec 2004
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From: South Weber, Utah
They are not interchangeable.
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Posting Guru
Joined: Nov 2012
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It takes a min. 500psi to start 650 avg. About 1200psi at idle. After that it depends on your speed&engine rpm. 4000 psi is designed maximum
Sorry I read ICP wrong info.
Sorry I read ICP wrong info.
Last edited by dannyboy950; Jan 1, 2015 at 10:42 AM. Reason: missread post
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
Mucho info on high pressure oil pumps.
https://www.ford-trucks.com/forums/1...firmation.html
Also interesting,
Early HPOP failure and possible fix.
https://www.ford-trucks.com/forums/1...and-a-fix.html
Edit: not saying I think your pump is bad (yet).
https://www.ford-trucks.com/forums/1...firmation.html
Also interesting,
Early HPOP failure and possible fix.
https://www.ford-trucks.com/forums/1...and-a-fix.html
Edit: not saying I think your pump is bad (yet).
Last edited by Rusty Axlerod; Jan 1, 2015 at 10:46 AM. Reason: Add
Thread Starter
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Laughing Gas
Joined: Jan 2012
Posts: 1,103
Likes: 1
From: Lakeland, TN
IPR 20.7 initially, then settled at 20.
ICP 712.
Cargo Master
Joined: Oct 2003
Posts: 2,833
Likes: 5
From: Jefferson, Iowa
Check the icp sensor voltage at key on engine off, should be between .18 and .24 volts. 20% ipr duty is low. It would indicate 1 of 4 things, oil thicker than x-40w, icp sensor problems, ipr problems or a tune installed. What was the ect/eot when tested?
Hotshot
Joined: Apr 2010
Posts: 19,072
Likes: 242
From: Saratoga Springs,UT
Yo pump looks ok so far
The 03-04 pumps have been upgraded if you got it from ford parts house
Your icp looks little high
Post all these numbers during a no start episode take the number during long crank like a 10 secon crank
Fordman has you covered
The 03-04 pumps have been upgraded if you got it from ford parts house
Your icp looks little high
Post all these numbers during a no start episode take the number during long crank like a 10 secon crank
Fordman has you covered
Thread Starter
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Laughing Gas
Joined: Jan 2012
Posts: 1,103
Likes: 1
From: Lakeland, TN
Running Matt's STL+
Mobil 1 TDT oil
I have a BPD external oil cooler and have to use a "cold front" to keep the oil warm
Thread Starter
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Laughing Gas
Joined: Jan 2012
Posts: 1,103
Likes: 1
From: Lakeland, TN
Dang thing started hot today, so I can't. HPOP was replaced in 2009, 10, or at latest 11, at the Ford dealer, so I figure I have the new one.