Why does my diesel truck crank but not start?
If the engine cranks but will not start, this may be caused by damaged wiring to the high pressure fuel pump. Wiring to the pump can be chafed, which causes the pump to stop working. The chafed wires will need to be accessed and repaired.
Why won’t my diesel start when its cold?
If your diesel doesn’t start in cold weather and you remembered to plug in the block heater, your battery may be the culprit. Batteries can lose 35 percent of their power at 32°F and as much as 60 percent at 0°F.
Where is the PMD on a 6.5 turbo diesel?
A Pump Mounted Driver (PMD) is the black box on the side of the injection pump on 6.5L diesels in GM vehicles.
What causes a 6 5 diesel not to start?
Where to come when your 6.5L Diesel will not start! If your diesel engine cranks but won’t start, you’ve come to the right place. “The PMD / FSD (Pump mounted driver) is by far the #1 cause of 6.5L no-starts (at least 90%).”
What is the number one cause of no start up?
“The PMD / FSD (Pump mounted driver) is by far the #1 cause of 6.5L no-starts (at least 90%).” If your truck experienced random stalling like someone shut the key off before ultimately refusing to start again, the PMD is very likely the issue. Typically the random stalls caused by the PMD will become more frequent as the failure worsens.
What happens when a diesel engine cranks slowly?
If the engine cranks slowly, insufficient heat will be generated and the engine will not start. If everything else is in good condition, a slow cranking 6.5L diesel will start, but if there are other minor issues, a slow crank may compound to create a no-start.
Why does my Truck start and run when I unplug it?
If the truck starts and runs, this means that the optical sensor is outputting faulty data preventing the truck from starting. By unplugging the sensor, you put the system into backup mode and the computer relies on information from the crankshaft position sensor.