pmd question

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pmd question

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pmd question - 1/2/2008 12:41:47 PM

tavion2378

Posts: 32
Joined: 12/16/2007
Status: offline

Where the harness plugs into the pmd there is a chip inside and mine says 7. I recently had injection pump replaced and when they pulled of the pmd to relocate the tech said it had a chip that read 5 so he swapped out with mine that read 7 is this and aftermarket upgrade with my pmd? In case im confusing everyone he used the new pmd just swapped out the chip.

Post #: 1

RE: pmd question - 1/3/2008 8:14:51 PM

tavion2378

Posts: 32
Joined: 12/16/2007
Status: offline

Wow nobody knows what this is for? The tech suggested that the seven meant more fuel??

(in reply to tavion2378)

Post #: 2

RE: pmd question - 1/3/2008 10:50:26 PM

ronb

Posts: 152
Joined: 11/9/2007
Status: offline

they are calibration resistors that run the injection pump at it's optimum performance. The truck will run without one, #5 works on all injection pumps. I only know this because I just relocated my pmd and have spent a bit of time on the phone with Dave Breggin at BlueHummer Outfitters.

http://breggin-enterprises.stores.yahoo.net/fsdcare.html

here's aexcert from Chuck's site flashoffroad.com:

If you get a new FSD you will need a new calibration resistor pack for $20. The resistor describes the pump to the electronic control system. The resistor must match the pump, not the FSD/PMD. When I purchased the FSD, there was no resistor with it - I had to buy one separately. I believe that if you get a complete pump & FSD, a new resistor (matching the pump) will be included.

The #5 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, like after the batteries are disconnected. If you don't use a resistor you will get a p1218 error code when the computer tries to read the value.

You can get the computer to see the new resistor by initiating a TDC Learn with a tech 2 scan tool. The computer will check the resistor value on it's own every 50 startups.

(in reply to tavion2378)

Post #: 3

RE: pmd question - 1/4/2008 10:52:22 PM

tavion2378

Posts: 32
Joined: 12/16/2007
Status: offline

Thanks I will call dave and ask him about mine I appreciate your input.

(in reply to ronb)

Post #: 4