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Unit Behind HPOP

1363 Views 8 Replies 5 Participants Last post by  RD97
Hey People, first of all, since this is my first post, I'd like to thank you ALL for the helpful and knowledgeable info you have provided me in the past with multiple issues. I've been a lurker until now. Kinda sounds nasty... Anyway, I have an issue that searching the forum hasn't help solve this time. In fixing a leak with the FRP sender on my 96 250 I realized that whatever is hooked to the back of what I believe is the HPOP is loose. It is located on the driver side of the filter housing down at the bottom in the valley. It appears to slide on a shaft coming out of the back of the HPOP and has a 2 wire connection and looks like it is held in place with a sleeve and a nut. The nut is gone so whatever it is slides back and forth. I recovered a flanged sleeve out of the valley but couldn't find the nut. I just cleaned the valley out with degreaser and hot water to find the fuel leak so it's possible I washed the nut out of the valley. The truck appears to run OK so I'm at a loss to figure out what this thing does. Thanks in advance for any clues.... Auto part Engine Fuel line Automotive engine part Vehicle

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Injector Pressure Regulator for new style pumps without "Edge" filter pictures from cars photos on webshots

here is what you need ipr o-ring kit F6TZ-9C977-AN or1825806C92 pictures from hobbies & interests photos on webshots

here is a pic with nut
if you are running it and nut is missing / someone upstairs is helping you:lol:
If the solenoid slips backwards at all engine will spit/sputter/quit:jester:
you are lucky man.
the nut needs to be there.
one time mine fell off and i found a threaded brass nut that fit ok.
it stayed like that for a few years till i replaced the ipr
I had this exact same issue. It would run fine, except for starting from a standstill or low speeds going uphill. Unfortunately, I misread the symptoms to mean I had a cracked oil pickup tube. I didn't see the missing tinnerman nut until the engine was on the stand.
That had to hurt
If the truck was scanned it would of showed that the ICP and duty cycle were a problem. I chased this problem on my 97 dually that has a stick and every time we took off it sounded like it lost some spark plugs :jester:

It took a few days but sure enough the nut ended up in the vally and solenoid was hanging free by the wires
I see your question has been answered already, but all I can say is this.

Why in the world would you use the front end of a classic vette for any kind of a workbench???? Got any pics of the car without a cover on it?
How did you pick up on that? I was to busy looking at the part :lol: :lol:
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