i need some spec.s to diagnois the aftermarket fds i have it dies for no apparent reason i need to be able to check this out

 

FDS? Do you mean FSD/PMD? (Fuel solenoid driver)

 

yea the one on the pump is unhooked and has a remote one on the intake

 

It's known as a PMD and get it out of the engine compartment what symptoms are you having and what codes are present???

 

it has no codes and will run for 5 minites or for hours nothind i wiggle or move seems to make a dirrerance

 

How old is that PMD??

 

So its still in the engine compartment? If i were you, i would order the extension cable, heatsink, and new pmd relocation kit and move it out of the engine compartment. Such as mounting it on the inside of the front bumper.

 

There is no test for a PMD/FSD;they work all the time or they don't and are bad-period.
Only buy new when diagnosing a PMD problem,the ebay used tested good are a crap shoot since they can not be tested except by using them.
It often takes several returns to get a REAL good used PMD and by the time you pay return shipping and wait you could have had a new 1.
Oriely's is said to offer a lifetime warranty PMD and that warranty is worth something.

 

my pulse widths are 2.2 when it die im thinking its over heating the resister the truck has 250,000 on it. are there any way to wire around resister until i can get another pump. i got this info on the pulse widths from a brand new snapon diagnoistic tool

 

Pulse widths of what?

What is it about PMD's can not be tested other than replacing them and observing the results that you are having trouble understanding?

Resistors almost never fail,but it can happen and even then the worst outcome is no start-not stalling.

The original PMD can be left in place and forgotten about when they fail,the aftermarket PMD relocation kits serve 2 functions.
1: making replacement easier due to the PMD being accessible.
2: allowing the PMD to be moved to a mounting location outside the hot underhood environment and away from large temperature spikes/swings.

A PMD/resistor/heatsink combo mounted under/below the ftr bumper or behind the grill on a rad support is a much better location for the PMD to survive at it's best.
A 6' extension harness is just the ticket for getting this done and can be purchased or you can stretch your original harness with solder and heatshrink.


A situation that mimic's a bad PMD is a failing ignition switch.

If you notice that the blower motor and/or radio keep working but the entire instrument cluster dies at the time of a stall-the ignition switch is a likely culprit.