Alright this one is a little funny I was driving down the road and the truck just stalled out of nowhere so I turned it over for about 10 sec and got no fire or nothing so I towed it home and took the water drain line and opened the valve to see how my lift pump was pumping and it was more than enough so then I took off the line that comes off the IP and and got buddy to turn it over and I had good flow out of there also so I took of the hard line that went to one of my injectors and hand turned it over and she fired right up so i shut if off right away, hooked the line back up then ran for about 2 min then just stalled out like someone shut off the key no shuddering of nothing so I tried starting it again and nothing. So I took off the line to the injector again to see if I had some flow there and it started, so I shut off the truck and hooked the injector line back up and then it ran for another few mins and then died again so ?? What are the 2 little rubber lines that go into your injector anyways ? I have a PDF relocate kit that looks pretty new. I just bought the truck 2 weeks ago from some guy and it only has 189 000 Kms on it and he bought it from an auction so I don't know what has all been done to it? How do I know if my Ip is shot ? Or if my PDF is acting up ?

 

What is a PDF (on the truck)?Do you mean PMD?

Your fuel return line is plugged, blocked, or pinched closed somewhere.

When this happens, pressure builds up in the IP, and something stops working correctly until the pressure returns to normal.

Remove the fuel return line off the top of the IP and from the tank, blow through it with an air hose. Start with that

 

[QUOTE=cviola2005;1025041]What is a PDF (on the truck)?Do you mean PMD?

Your fuel return line is plugged, blocked, or pinched closed somewhere.

When this happens, pressure builds up in the IP, and something stops working correctly until the pressure returns to normal.

Remove the fuel return line off the top of the IP and from the tank, blow through it with an air hose. Start with that[

Yah I mean the pmd what line is that I can't trace it bc there is so many lines coming off the Ip, I changed the lift pump and fuel filter today and took off the driver side injection lines and got the air out of them then it fired up so I let it run for 2 hrs and it ran fine i didnt drive it anywhere bc i dont trust it quite yet. so I don't know what happend ? I think your on to something with that line , where would I find it ?

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I comes directly out of the top of the IP, towards the front of the engine. It basically forms a "U" shape, going to the metal line. The metal line connects injector return lines from both sides, the IP, and the fuel tank return line. The line to the tank, and the IP return line both connect to the metal line between the IP and front cover.

 

Your symptoms scream failing PMD or bad ignition switch.

Where is the relocated PMD fastened?

If intake mounted relocate outside the engine bay with an extension harness when you replace the PMD-also make sure that if the IP/PMD harness ground is connected to the PMD heatsink-move it back to the IP where it belongs.

Picture #2 shows the proper loaction for the ground:
Roy Halvorsen

 

The Pmd is located right in between my fuse box and my battery on the drivers side, where is this ignition switch ? Today I drive the truck for about 20 min stopped at work for an hr then stated it and then it died about 100 yards down the road so I started it again then it died about 5 sec later then I stared it and then it died again and this happend about 6 times so I limped it to the Garadge and played around with some I wire on the top of my engine , as soon as I disconnected it, it would go into high idle then I connected it and it would go to he normal idle, then for some reason I was able to drive it back home about 6 Kms ???? I don't know what I did but I know it's not fixed yet and for the ignition switch would it have something to with me not having the factory keys bc the ones I have now are junk the owner b4 me lost them, they don't go in the ignition with crap and its hard to get it to go forward once you put the key in? If you know what I mean

 

Ignition switch is in the steering column below the ignition tumbler.

When it stalls does the instrument cluster die as well but the radio and blower motor continue to work?
If so that points to the switch.

Still think that the PMD is the likely suspect though-mounting anywhere in the engine bay is a poor location.

In frt of the rad on a core support or under/behind the frt bumper are acceptable mounting locations to keep the PMD at or near ambient temps at all times.

Also be sure that heat transfer paste or a heat transfer pad is used between the PMD and heatsink as well as the mounting screws are torqued to 20-25 inch pounds.

A PMD resistor must also be installed in the PMD's harness cavity.

Sounds like you disconnected the ECT sensor(coolant sensor) for the ECM.

 

Yah when it dies everything still works ...
And what is this heat transfer paste and pad ? All about and this heat sink by I took one of the machine screws off yesterday and put it back in , is there any way to send pics on this web site ? And I don't know what the heck a resistor is ?

 

Between the aluminum heatsink and the PMD there needs to be a layer of computer CPU heat transfer paste or they sometimes are supplied with a heat transfer pad.

There must be something of 1 or the the other of those 2 items to take up the space between the the contact points of the heatsink and PMD so that heat can flow freely between them and eliminate hot spots.

To upload pictures click "go advanced" and then scroll down to manage attachments and then upload the pictures along with your text by clicking the bottom submit message.

Pictyures of your PMD location and mount would go a long way to help us advise you of a better setup or to verify it is now correct.

 

Where is this go advanced button here I am doin all this on my phone . Do I have to get a better acount on this website to do that ? Sorry dude bare with me we will get this figured out