So, the screen in the tank was ripped, but no dirt, so I thought it would be a crack in the plastic line. WRONG! check the picture out, it's the screen on the inlet of my lift pump. It was totally clogged, but loosly, so when I would shut the truck down, the crap would backwash down the tube a ways, so it would run normally, until all the junk would pack back in the screen and shut the flow down. Since I had all the stuff anyway, I did the 3/8" pickup line bomb as described in the sticky and bent and ran coated 3/8" steel fuel line, mounted a big fuel filter by the tank and a diesel pusher pump. Now I have 20 PSI reading after the main fuel filter.
I will drive it tomorrow.

 

Good find. I have never heard of that happening before. I honestly didn't know there was a screen there.

 

"Specifically Designed with your inconvenience in mind"

Mark.

 

Hey Mark!
I tried the 1200 grit emry cloth on the sending unit after driving out the pin, and bent the the brushes to preload them, but now my gauge only reads 1/4 tank and it's full. Maybe I overdid the sanding....
The thought of pulling the tank again makes my butt pucker, so I am going to live with it for a while...

 

Only 1/4?
Usually this works just fine for me.
"Lightly" is the idea for the sanding, but as I pointed out on the sender I left, they definitely seem to wear a lot in the 1/2-3/4 tank range.

It's probably because "most" people keep them at least 3/4 full and that's the wear point when fuel sloshes around.

I wouldn't be surprised if the sending unit has 10-20 miles of motion in a 500 mile trip.
Lotta' bouncing around going on there, even though the guage itself doesn't move accordingly.

Mark.

 

It runs better now with the big fuel supply and higher pressue for sure. It's idling better with the A/C on when hot. I haven't redlined it yet but I pulled it to 105 MPH and it didn't fall off at all.

 

I got stranded beside the road, log-chained home, and spent days finding that the problem was gook against that screen, hence my oft-given advice to ALWAYS run an easily accessible pre-filter immediately ahead of the lift-pump.

It is much easier to see the problem and swap a cheapo filter, than to be disecting a fuel-pump beside the road.

I route extra fuel-line, such that the pre-filter is up high, under the hood, instead of down in under there where one does not want to be a crawling around with his Sunday-go-to-meetin' clothes on.

 

Good advice. I put in a Fram racing filter like I used on the HEMI car, then a Mr. Gasket 12D pump pushing to my piston LP.
http://www.stockcarproducts.com/images/hpg1.jpg