Schrader valve?

[kbenz]

I have fuel going into filter head but none out of schrader valve? Fuel filter light came on. Started running like crap. Surging. Checked valve while running and nothing. Got it home and died. Won’t start now.

 

[Kizer]

I'd bet on a plugged filter ... though I've never witnessed one plugged that bad.

I think I'd start there anyway.
Don't forget to prime the filter before you install it.
I use ATF for priming.

Good luck.

 

[IDIoit]

lift pump?
this is why i use fuel pressure gauges on my filter head...
for diagnostic purposes

 

[kbenz]

lift pump?
this is why i use fuel pressure gauges on my filter head...
for diagnostic purposes

I have a gage. Put it on schrader valve?

 

[kbenz]

lift pump?
this is why i use fuel pressure gauges on my filter head...
for diagnostic purposes

I have a little over 2lb at schrader with valve stem removed

 

[IDIoit]

many ways to do this. can be T'd into schrader, but easier to find the correct fittings to install it before the filter head.
i put a mechanical one here,
and put an electric one after the filter head to see it from inside.
also tells me when filter is fawked

 

[kbenz]

many ways to do this. can be T'd into schrader, but easier to find the correct fittings to install it before the filter head.
i put a mechanical one here,
and put an electric one after the filter head to see it from inside.
also tells me when filter is fawked

Looks like 2.8 before filter and 2.2 at schrader

 

[gandalf]

What you're measuring at the schrader is the pressure entering the filter. If the problem is indeed the lift pump that's good. However, if the problem might be the fuel filter, you've got to measure after the filter. Here is a picture of the temporary setup I had. This was on my '92 CCLB Dually. I kept this a couple months, until the gauge fogged up. It was a cheap POS gauge.

You must be registered for see images attach

 

[IDIoit]

my 87 7.3 TIDI has 7 psi of fuel at the filter
my 63 TTIDI has 15 psi

below 3 psi seems low to me. even with a mechanical pump

 

[kbenz]

my 87 7.3 TIDI has 7 psi of fuel at the filter
my 63 TTIDI has 15 psi

below 3 psi seems low to me. even with a mechanical pump

it has electric. I just finished changing it out.
8-9 before filter now
Batteries are down. Waiting on them to charge

 

[kbenz]

Got it figured out. Trash in my tank. Put a sock on it for now. Seems to be fine