Where is the FSD located on a GM Truck?
Where is the FSD located on a GM Truck?
It has 2 power transistors mounted on the back that generate heat that has to be dissipated. The injector pump is mounted deep in the center valley of the engine in a very hot environment. The FSD is exposed to heat that can cause it to fail over time. The Stanadyne DS-4 pump has been used on GM trucks since 1993.
Where is the FSD / PMD located on the injection pump?
Note: The FSD/ PMD (same thing) is a small black box on the side of your injection pump. It is a signal amplifier that powers the fuel solenoid on your injection pump. It has 2 transistors mounted on it’s backside that generate heat that has to be dissipated.
When do You Know you need a new PMD?
Simply put, if your check engine light is not on and you experience stalling, it is a 95+ percent certainty that you need a new PMD. If your check engine light is on, you need to get your codes checked. Auto Zone and others will do this for free.
What does a failed FSD do to the engine?
A failed FSD will not display an engine light. Pictured above the FSD is a small black box about the size of a deck of cards bolted to the side of your injection pump. It is an amplifier that receives signals from the engine computer to pulse the fuel solenoid which tells the injection pump to send fuel to the engine.
Simply put, if your check engine light is not on and you experience stalling, it is a 95+ percent certainty that you need a new PMD. If your check engine light is on, you need to get your codes checked. Auto Zone and others will do this for free.
When do you need a new PMD for a diesel engine?
Simply put, if your check engine light is not on and you experience stalling, it is a 95+ percent certainty that you need a new PMD. If your check engine light is on, you need to get your codes checked. Auto Zone and others will do this for free. If you ONLY have codes P1216, P1217, 35, 36 or any combination of those, you need just the PMD.
Do you need PMD code for Auto Zone?
Auto Zone and others will do this for free. If you ONLY have codes P1216, P1217, 35, 36 or any combination of those, you need just the PMD. If you have codes P0251 or PO370, 17, 18, or any combination of those, you should consider the injection pump suspect.
What to do if your 6.5L PMD is stalling?
In 99% of cases if you have the classic 6.5L stalling (and no optical sensor codes) the problem is the PMD and the recomended solution is our 6.5 diesel FSD heatsink kit!
