PMD Failure...First Things Noticed??
#1
PMD Failure...First Things Noticed??
I think I may have a failing PMD, just wondering what other drivers experience when theirs acts up. I am seeing slower acceleration, smoke under hard acceleration, hesitation between shifts under hard acceleration and it doesn't start as good as it used to.
#2
the truck wouldnt start about a month ago, then started up after sitting for an hour, last week it died on the highway while doing 70mph, the next morning started up drove it home and it died in my driveway, replaced PMD, started right up no problems since
99% of pmds will go out if you have the factory one still in there......do it now before you are on the freeway like me and it dies out of nowhere.... I also replaced my fuel filter which was super easy, the old one was black.....
99% of pmds will go out if you have the factory one still in there......do it now before you are on the freeway like me and it dies out of nowhere.... I also replaced my fuel filter which was super easy, the old one was black.....
#3
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#7
Hello guys,
I am doing a lot of research on the PMD. There is still many problems with the current production design. If you have a run away motor or surging motor condition is due to a bad capacitor that is normally supposed to mitigate EMI on the electrically isolated heat sink. This is not due to heat, but heat makes the internal trace resistances go up and this makes this makes the condition come on earlier.
If you sand off the anodizing on the heat sink and ground it, all of the EMI noise on the heat sink will be suppressed allowing the internal IC's to have a better signal (there is so much noise in this condition that the power transistors think they are supposed to be on all of the time).
I have a post about the PMD in another forum if you are interested:
NEW PMD design for 2011 and PMD info - Diesel Place : Chevrolet and GMC Diesel Truck Forums
I am doing a lot of research on the PMD. There is still many problems with the current production design. If you have a run away motor or surging motor condition is due to a bad capacitor that is normally supposed to mitigate EMI on the electrically isolated heat sink. This is not due to heat, but heat makes the internal trace resistances go up and this makes this makes the condition come on earlier.
If you sand off the anodizing on the heat sink and ground it, all of the EMI noise on the heat sink will be suppressed allowing the internal IC's to have a better signal (there is so much noise in this condition that the power transistors think they are supposed to be on all of the time).
I have a post about the PMD in another forum if you are interested:
NEW PMD design for 2011 and PMD info - Diesel Place : Chevrolet and GMC Diesel Truck Forums
#8
I have talked to GM and they are "looking" into our growing problem with the PMD's so sign my petition and lets get this fixed they told me they wouldn't fix mine because they don't approve of modifications, even if it will fix a design flaw abviously BS.. lets get this taken care of.. diesel engines PMD short life span shoudl be fixed at manufacturers cost
here is the link to sign my petition...
here is the link to sign my petition...
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