[hatzie]

Originally Posted by 52napco

Good advice Hatzie...
I'm riding home a while ago from Lowe's racking my brain and it dawned on me I had put the hoses back like they were on the old switching valve I thought well you know maybe they're on the wrong port the left fuel pump might be running but it's Dead Heading against the right side port of that valve... worth a look makes sense as to why I'm not getting any fuel pressure... well low and behold I should have slowed down to speed up.....somebody I guess the previous owner, had the hoses switched from right to left so when the right fuel pump would switch on it was dead heading against the left port on the switching valve so I switched the hoses around and walla it runs like it's supposed to...

So at the end of the day the best advice I can give anybody is take about 30 minutes and really just look at everything to see what's been messed with over the years.. a lot of stuff happens on a 31-year-old truck over the years.

Taking a step back seems to be the best medicine when you're stuck sometimes.

When I mess with the hoses on fuel valves I tape the supply and return tank hoses with blue and green painters tape and write S on the supply and R on the return. I use regular tan masking tape on the engine compartment hoses again marked S & R. All so I don't hook up the Left return hose to the Right hand barb on the valve and-or deadhead the supply hoses or screw it up some other way.
And never trust what the last guy did
I started the 72 F250 with two full tanks and a new valve and lines. Shortly the RH tank was overflowing out the vent cap cause I hooked up the return hoses bass ackwards. That was the last time i wanted to make that mistake.