The ford let me down
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Fleet Mechanic
Joined: May 2011
Posts: 1,866
Likes: 84
From: Rainier OR
Yes Dan, that is still my consearn. I am closely watching the lpop side. Remember, this was not a hard start problem, or even a long crank problem. Always started within 3 seconds of cranking. It died while driving and would not restart. I first thought it was a lpop problem. The oil pressure gage would not move while I was trying to start it. The first thing I did when I got it home w as s to pull the lpop relief valve and check it out. Did not find any problems. I posted that the op switch pigtail was bad and that COULD have been why I never saw the op gage move. If it was a lpop problem why do I have pressure now? Lpop system is all mechanical, how can it not work one day as be fine the next? Time will tell. I am not calling it fixed, but it is working fine now.
Posting Guru
Joined: Nov 2012
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The regulator may have stuck. All regulators of that type work by relieve excess pressure to maintain desired pressure. It does not actually increase pressure.
Let me explain a little further. A gear pump unregulated can build pressure untill it comes apart at the weakest spot. What I like to call an infinity pump.
Let me explain a little further. A gear pump unregulated can build pressure untill it comes apart at the weakest spot. What I like to call an infinity pump.
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Fleet Mechanic
Joined: May 2011
Posts: 1,866
Likes: 84
From: Rainier OR
It's is a relefe valve for the reason you stated. It would have been stuck OPEN to keep the system from building pressure. There was no evidence of that when I took it apart. It COULD have been, but I didnt see anything in it and was moving freely in the bore.
I drove the truck to work today, 20+ miles each way, and then hooked up to the dump traler and another 20 mile drive in 90+ deg heat. No problems so far.
I drove the truck to work today, 20+ miles each way, and then hooked up to the dump traler and another 20 mile drive in 90+ deg heat. No problems so far.
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jason poeppel
6.0L Power Stroke Diesel
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Mar 23, 2017 01:23 PM
