My truck seems to be starving for fuel. Replaced the inline filter and still have the issue. Before I drop the tank to replace the sending unit I noticed the fuel selector valve. Could this be clogged and restricting fuel? Also why would an all original single tank truck even have a selector valve?
Thanks Rick

 

Are you talking about the "module looking thing" on the frame rail? I think that's called a Single Fuel Reservoir and is used to control fuel flow back from the fuel rail. Excess fuel not needed needs to get back in the system and this reservoir is part of that process.

 

It's a fuel reservoir and holds about a pint of fuel for the HP pump to draw from. This was fords solution to EFI without tank baffles. In 90 they redesigned the system and had an insert that went into the tank to function as a baffle. That's also when they went to a single in tank pump.

From what I understand only the 85-86 versions had a filter in them and yes, that can choke off fuel.

You could have a bad in tank pump and the HP is doing all the work. I had an issue like that where it would cut out over 2500 rpms.

 

Thanks guys. I am guessing I will be pulling the in tank pump next. Any tip or tricks before I begin? I've done thin on other vehicles in the past but not this particular one.
Rick