PMD Fails In Cold Weather
#1
PMD Fails In Cold Weather
My 6.5TD ran fine all summer but when the temperature dropped it would start but while idling/warming up it would quit after running only a minute or two. It started again but again ran for a few minutes then quit. This would go on for 4 to 9 times before I got it to idle without stalling.
Everybody knows PMDs quit due to hot temperatures so I looked for other causes but nothing corrected the problem. Finally on a 20 degree morning I put a 60 watt lightbulb under the PMD for 2 hours and put a cardboard box over the bulb to keep the heat in (my PMD is mounted on a heat sink above the intake manifold). After 2 hours I started the engine and it ran perfectly without ever stalling. I've done this at least 8 times on very cold mornings and it worked every time.
Don't know if anyone has had probs with the PMD in cold weather but that's my solution if it happens. Of course, the PMD will be replaced.
Everybody knows PMDs quit due to hot temperatures so I looked for other causes but nothing corrected the problem. Finally on a 20 degree morning I put a 60 watt lightbulb under the PMD for 2 hours and put a cardboard box over the bulb to keep the heat in (my PMD is mounted on a heat sink above the intake manifold). After 2 hours I started the engine and it ran perfectly without ever stalling. I've done this at least 8 times on very cold mornings and it worked every time.
Don't know if anyone has had probs with the PMD in cold weather but that's my solution if it happens. Of course, the PMD will be replaced.
#3
#5
pure heat actually doesnt really kill them its the large difference in temps that kill pmds. engine is same temp in winter and summer but in the winter the engine gets a lot cooler after you havent ran it for a long time for obvious reasons. in the summer the temp difference isnt as drastic as ambient air temp is a lot higher
#6
I installed a new AC Delco Oil Pressure Switch (OPS) and that cured the problem I was having with the fuel lift pump not running but the engine still quits while idling on a cold morning. Today it quit 3 times before I could get more than 2 blocks from my house and the outside temp was 40*. Any other ideas out there???
#8
#10
My PMD is mounted on the big heat sink made by SS Diesel, on top of the intake manifold. I installed it in March of 2006 and it has 8,748 miles on it. It is a Stanadyne. Remember that when I warmed the PMD with a 60 watt light bulb for a few hours before starting the engine on a cold morning, the engine didn't stall. Cold must be a factor in this problem.