I unwillingly have encountered problems with my PMD. Big surprise I know especially after reading all the complaints from members from here. BUT I have bought another PMD and installed it.( Truck died on me on the interstate and wouldn't start back up) and it still will not start. All signs point to the PMD but I was just wondering if the resistor had anything to do with the one not working.

The PMD does not need the resistor to make the engine run.

some have reported stalling issue with "no resistor" PMD, especially on OBD2.
Did you try to put a resistor in and do a relearn procedure?

What's the "relearn procedure"?

Relearn procedure (ko-ko routine) is usually necessary when :
1. A diagnostic trouble code of P1214 (TDC offset not established) is present.
2. The engine has been replaced.
3. The front engine cover has been replaced.
4. The PCM with or without the injection pump has been replaced.
5. The crankshaft position sensor has been replaced.

In the present case, none of these, but if the truck doesn't start anymore, it would be difficult to perform the ko-ko routine (key on-key off).

Try to put a resistor in, disconnect both batteries for a while, reconnect and try to crank.

Holyoak, the ko-ko- routine is a s follows :

1. Hook up your scan tool.
2. Start the engine and idle engine until coolant temperature is at least 170 degrees F.
3. Clear any diagnostic trouble codes, if any. Then turn the engine off.
4. Turn the ignition switch to the “On” position. Do not start the engine.
5. Prepare the PCM to activate the offset relearn by placing and holding the accelerator pedal in the fully open position for no less than 45 seconds. Then release the pedal.
6. Turn the ignition switch to the “Off” position for 30 seconds. To confirm that the PCM has powered down, you should get a “No communication with vehicle” message on your scan tool.
7. Now start the engine and make sure that the coolant temperature is 170 degrees F or higher.
8. As soon as the engine coolant has reached 170 degrees F. and the engine speed is below 1500 RPM, the PCM will automatically learn the new TDC offset. A slight stumble in engine RPM is indicative that the new TDC has been activated.
(instructions are coming from this forum, just a cut and past ;) )

Cool. Thanks.

Hey Matuva, I was wondering if I could just install the new resistor and then disconnect the batteries and it will "relearn" or reset the system that way.

I recently had two new batteries installed and then this started happening a few days later with the PMD. I read this ad here and wanted to see if " it hold any water", so to speak.

"The #5 calibration resistor is considered the "average", and almost any pump will work with a #5 resistor. The resistor is only used when the control computer forgets what the value is, which occurs after the batteries are disconnected or a hard reset is performed with a tech tool. If you don't use a resistor you will get a p1218 error code when the computer tries to read the value. ."

I have a 99 truck and when I bought it some bone head relocated the PMD and didn't put the PMD on the any kind of heatsink he just left it on the intake plug in. To make a long story short I had to fix some stuff and order a Heath Diesel PMD kit but the one that was plug in sitin on the intake had no resistor and it didn't stall or not start and was like that for at least 5 months.

Hey Matuva, I was wondering if I could just install the new resistor and then disconnect the batteries and it will "relearn" or reset the system that way.

I recently had two new batteries installed and then this started happening a few days later with the PMD. I read this ad here and wanted to see if " it hold any water", so to speak.

"The #5 calibration resistor is considered the "average", and almost any pump will work with a #5 resistor. The resistor is only used when the control computer forgets what the value is, which occurs after the batteries are disconnected or a hard reset is performed with a tech tool. If you don't use a resistor you will get a p1218 error code when the computer tries to read the value. ."
Yes try that way.
BTW, how is your new PMD mounted? stock, remote, side of intake, outside engine bay?
Is it a brand new one or a "used but tested good"?
Is the ground wire from IP harness still on top of IP or relocated to heatsink? (it must stay on IP).
Check carefully grounds too.

some have reported stalling issue with "no resistor" PMD, especially on OBD2.
Did you try to put a resistor in and do a relearn procedure?

The ECM will not know if you take the resistor out, but eventually it will check and find it missing. The TDC learn procedure is a sure way to get it to check. The only other way that I am aware of is that it seems to look after a certain number of run or key cycles. The evidence for this is merely observed behavior: Dealer replaces PMD w/o resistor. Customer drives truck months, even years, then gets the SES light/calibration error out of the blue...

Matuva, I have one of each PMD new and used. I haven't had a chance to mount it yet. I just ordered the resistor online since NO ONE (dealerships) even knew what I was talking about on the resistor. (you were correct Kennedy) So it won't work if the PMD is grounded to something else other than the IP? I've seen a few people mount it between the PMD and the cooler. Also...does it matter if it gets wet? I was thinking about mounting it on the bumper but not if moisture is a problem. I guess somewhere inside the cab would do well then. Also still have to order an extension harness and cooler as well.

Thanks guys for all your useful info.

It will work, but some guru here say don't put it at another place. They explain why by I don't remember precisely why; something related to ECM groundings IIRC.
That said, there's no use to relocate this ground wire anyways as you can find it in the harness connected to the PMD : your PMD keeps grounded as stock via the harness, relocated or not.
About moisture, if it is something with frightened you ( it did for me) mount your PMD on the heatsink using thermal glue (see Item number: 250233855269 on fleabay), put a bead of silicon on the screw heads. The extension cables are set with weatherpack connectors so it is fine on this side.
Mine is mounted behind/under bumper (have a look at my garage). New Caledonia where I live is a tropical island, and believe me, when it rains it rains, and I have no moiture issue yet.

just wondering if anyone has tried mounting the PMD directly onto the radiator, next to the auxilliary oil coolers? It would get direct airflow and be easy to get to if you needed to service the unit.

As long as it is outside the engine with heatsink.

Somebody posted a picture in the past, they mounted in between the grill and the radiator. Again, as long as it is outside the engine compartment.

just wondering if anyone has tried mounting the PMD directly onto the radiator, next to the auxilliary oil coolers? It would get direct airflow and be easy to get to if you needed to service the unit.
Yes, we used the ssdiesel heatsink and mount them between the headlights (passenger side on a Z71, driver side on a Cheyenne). Just enough room and perfect cooling.

As long as it is outside the engine with heatsink.

:exactly:

I have a 99 truck and when I bought it some bone head relocated the PMD and didn't put the PMD on the any kind of heatsink he just left it on the intake plug in. To make a long story short I had to fix some stuff and order a Heath Diesel PMD kit but the one that was plug in sitin on the intake had no resistor and it didn't stall or not start and was like that for at least 5 months.

You and I must have bought a truck from the same bonehead. I'm going through all the B.S. I'm going through now because of the same some stuff that was done to this one. I feel your pain.

You say it hasn't stalled or anything yet without the resistor. Has the batteries been disconnected on it yet? Or system been reset?