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How do you test a PMD on a 6.5 Diesel?

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Asked By: Haize Gilar | Last Updated: 26th April, 2020
The next steps check power and ground at the PMD.
  1. First, connect your test light to a good clean engine ground. Touch the probe of the test light to the pink wire terminal in the PMD connector.
  2. Next, connect the CLIP of your test light to one of the positive battery terminals making sure it has a good connection.


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Also to know is, how do I know if my PMD is bad?

The most common symptom for the pmd failing is a hard starting hot issues. You could be sucking air into the fuel system some how. Do you know how many miles are on that pmd or that injection pump? Those Injection pumps get 90,000 – 130,000 miles out of them.

One may also ask, how do you bleed a 6.5 Chevy Diesel? With the bleed orifice on the fuel filter open, crank the engine over for no more than 10 seconds, then position the key to the “OFF” position and allow the starter to cool for 60 seconds.

Accordingly, what is a PMD on a Chevy Diesel?

PMD stands for Pump Mounted Driver. The same part is also called an FSD or Fuel Solenoid Driver. (One is GM terminology, the other Stanadyne terminology). It is a “black box” about the size of a pack of cards mounted on the driver’s side of the injection pump.

What is a PMD?

Medical Definition of PMD PMD: Pelizaeus-Merzbacher disease.

What does a pump mounted driver do?

A Pump Mounted Driver (PMD) is the black box on the side of the injection pump on 6.5L diesels in GM vehicles. The PMD is a solenoid pack that builds up heat and uses the injection pump, and the fuel running through it, to absorb that heat.

How much oil does a 6.5 turbo diesel take?

6.5L GM/Detroit Diesel Specs
Engine: GM/Detroit 6.5L diesel
Valvetrain: Common overhead valve (OHV), 2 valves per cylinder
Oil Capacity: 7 qts w/ filter for 1992 – 1998 model years, 8 qts w/ filter for 1999+ model years. Always check oil level after filling crankcase.
Engine Weight: ~ 750 lbs
Max Engine Speed: 3,400 rpm

Where is the PMD located on 6.5 diesel?

The PMD is mounted to the driver side of the Stanadyne DS-4 injection pump centered in the valley at the front of the engine. By design, the flow of diesel fuel through the injection pump is intended to cool the PMD, which produces and must dissipate a significant amount of heat.

What does a PMD resistor do?

The Calibration Resistor on your 6.5L Diesel sets the maximum fuel delivery volume of the injection pump. It is analogous to the maximum fuel adjustment screw on an old fully mechanical injection pump.

How do you set the injection pump timing on a 6.5 Diesel?

The timing values will fluctuate, set to an average of 3.5 degrees. Turn the engine off before loosening the pump flange nuts to adjust the timing. If the engine stalls during the procedure rotate the injection pump 1mm towards the driver’s side of the vehicle to advance the timing.

How do you test a 6.5 lift pump?

How do I Check the Lift Pump on a 6.5 Turbo Diesel?
  1. Park the truck on level ground and allow engine to cool before starting.
  2. Open the fuel filter water drain in the engine compartment, with the truck running.
  3. Determine if there is air in the system.
  4. Remove the fuel filter and check the housing to see if it is dry.

How do you change the injection pump on a 6.2 Diesel?

Replacing the Injection Pump on a 6.2L Diesel:
  1. Remove the inner engine cover and remove the intake manifold.
  2. Remove the hard fuel lines.
  3. Remove the oil fill tune on the engine.
  4. Take and mark the injection pump housing to the timing cover.
  5. Remove the 3 bolts on the inside of the hole that the oil fill tube was.

How do you check the fuel pressure on a 6.5 turbo diesel?

Install a fuel pressure gauge to the drain/bleed valve hose. Start the engine, then crack open the drain/bleed valve and read the fuel pressure. Fuel pressure should read between 3 and 7 psi at idle. Anything lower than 3 psi may indicate that the lift pump is not performing properly and should be replaced.

How good is the 6.5 turbo diesel?

A 6.5 can be a good truck, if you do some work and accept it’s limitations. It’s a light duty diesel made for MPG. You can work it (towing) but it’s not intended for full time commercial use. It will do it, but you’re taking life off it every time.

How do you test a diesel lift pump?

To diagnose lift pump performance, click the ignition key to the start function quickly, so the engine doesn’t start, and let go, leaving the key in the run position (the lift pump should run 25 seconds).

How do you get air out of fuel system?

To purge air from the low-pressure side of the fuel system, open fuel-line unions and bleed ports downstream of the pump, one at a time, beginning with those closest to the pump, and continue pumping until fuel, and not air, runs out.