Why won't my truck stay running?
#1
11-03-2016, 01:22 PM
Why won't my truck stay running?
My '99 shuts off while driving and while idling at random. It will then start right back up. I have this question posted to a couple of different forums to try and get some answers, but here's the situation:
The truck ('99 3500 4x4 auto 24v) has been sitting unused at my parents house for a about a year now because of a problem my dad found with it where he claimed it would randomly shutoff and he'd have to wait about 30 minutes before he could start and run it again. I just finished grad school and have some time before I start my new job so I've been over to their house and started troubleshooting the truck. We have owned the truck since about 2007 and have replaced the injection pump and the transfer pump around 162k miles. The truck now has 208k miles on it and has never had any other problems.
I have started the truck, driven the truck, allowed the truck to run continuously for about 4 hours, and I haven't seen it shut off or anything else troublesome. My dad reported that the shutoff problem came once while driving in stop and go traffic, and once while idling after driving for about an hour. Thinking that the problem likely was brief fuel starvation from the transfer pump (because we all know about how great these stock transfer pumps are), I installed a mechanical fuel pressure gauge and BD Power fuel pressure warning light. The truck has great fuel pressure. The bump/start test yields 5-7 lbs, idle yields 14-15 lbs, and wide open never drops below about 10-12 lbs. Now, with a way to monitor the pressure, I began driving the truck. I made a few trips totaling about an hour each and then let the truck sit and idle for a few hours. No issue, and no drops in pressure while having my eyes glued on the gauge the whole time. Thinking that my dad must've invented this problem somehow, I though the days of worry were over.
So a couple weeks ago after Hurricane Matthew barreled through Florida and left use without power, I decided to buy a surplus 45kw generator in VA. I decided to take the ram to go get it because it runs great now! ...or so I thought.
Driving the 11 hour drive was no problem. The truck did fine in stop and go, cruise control, 85+ mph, passing people, and had plenty of power to spare. No hiccups whatsoever. At least until I got to VA where I entered the warehouse property and let the truck idle while the genset was loaded onto the trailer. The truck died. I thought, "oh ****." I went back to the cab and restarted the truck. It started after a few cranks. It ran a bit more and died again. I restarted and it seemed fine so I put it in gear and began to leave the property with my new genset. While turning around on the property, the truck died again. I knew it was hopeless at this point. Luckily, they let me park the truck and trailer on promises that I'll be back to get it in the coming weeks.
I'm baffled. The truck did great for 11 hours of highway driving. Let it idle, it dies. It starts back, but won't stay running. I had it towed to the local dealership to run the codes but wait for it..... they told me my batteries were dead and wanted $2000 for new batteries and cables!!!! WTF?! Not happening. I'm heading up to get the truck with another dually this weekend.
Where should I start to trouble shoot this thing? What do you think is wrong? To me, it seems to defy any kind of logic. My best guesses are:
1) Loose or dirty electrical ground causing the injection pump to shutoff.
2) Air in the fuel system
3) Clogged strainer for the in-tank fuel pickup
More details and thoughts:
*One of the batteries doesn't hold a charge and does need to be replaced
*The crank position sensor on the bottom of the block is covered in oil splatter from use over the years
*CCD is displayed in the overhead console
*The 'wait to start' feature hasn't worked since I've been driving the truck. It's Florida so it still starts right up. However, it did used to work.
*With all the electrical issues, it must be part of the shutoff problem. If it were the injection pump again, it wouldn't start back up at all, right?
*No check engine light and no OBD-II codes (this is why I took it to the dealership so they could check for DRB codes)
*ABS and BRAKE light are on, but I think that's unrelated and a back 4x4 hub sensor.
So...for my sanity...please give me your experiences, suggestions, thoughts, and any other relevant information on the matter. I don't know where to start.
The truck ('99 3500 4x4 auto 24v) has been sitting unused at my parents house for a about a year now because of a problem my dad found with it where he claimed it would randomly shutoff and he'd have to wait about 30 minutes before he could start and run it again. I just finished grad school and have some time before I start my new job so I've been over to their house and started troubleshooting the truck. We have owned the truck since about 2007 and have replaced the injection pump and the transfer pump around 162k miles. The truck now has 208k miles on it and has never had any other problems.
I have started the truck, driven the truck, allowed the truck to run continuously for about 4 hours, and I haven't seen it shut off or anything else troublesome. My dad reported that the shutoff problem came once while driving in stop and go traffic, and once while idling after driving for about an hour. Thinking that the problem likely was brief fuel starvation from the transfer pump (because we all know about how great these stock transfer pumps are), I installed a mechanical fuel pressure gauge and BD Power fuel pressure warning light. The truck has great fuel pressure. The bump/start test yields 5-7 lbs, idle yields 14-15 lbs, and wide open never drops below about 10-12 lbs. Now, with a way to monitor the pressure, I began driving the truck. I made a few trips totaling about an hour each and then let the truck sit and idle for a few hours. No issue, and no drops in pressure while having my eyes glued on the gauge the whole time. Thinking that my dad must've invented this problem somehow, I though the days of worry were over.
So a couple weeks ago after Hurricane Matthew barreled through Florida and left use without power, I decided to buy a surplus 45kw generator in VA. I decided to take the ram to go get it because it runs great now! ...or so I thought.
Driving the 11 hour drive was no problem. The truck did fine in stop and go, cruise control, 85+ mph, passing people, and had plenty of power to spare. No hiccups whatsoever. At least until I got to VA where I entered the warehouse property and let the truck idle while the genset was loaded onto the trailer. The truck died. I thought, "oh ****." I went back to the cab and restarted the truck. It started after a few cranks. It ran a bit more and died again. I restarted and it seemed fine so I put it in gear and began to leave the property with my new genset. While turning around on the property, the truck died again. I knew it was hopeless at this point. Luckily, they let me park the truck and trailer on promises that I'll be back to get it in the coming weeks.
I'm baffled. The truck did great for 11 hours of highway driving. Let it idle, it dies. It starts back, but won't stay running. I had it towed to the local dealership to run the codes but wait for it..... they told me my batteries were dead and wanted $2000 for new batteries and cables!!!! WTF?! Not happening. I'm heading up to get the truck with another dually this weekend.
Where should I start to trouble shoot this thing? What do you think is wrong? To me, it seems to defy any kind of logic. My best guesses are:
1) Loose or dirty electrical ground causing the injection pump to shutoff.
2) Air in the fuel system
3) Clogged strainer for the in-tank fuel pickup
More details and thoughts:
*One of the batteries doesn't hold a charge and does need to be replaced
*The crank position sensor on the bottom of the block is covered in oil splatter from use over the years
*CCD is displayed in the overhead console
*The 'wait to start' feature hasn't worked since I've been driving the truck. It's Florida so it still starts right up. However, it did used to work.
*With all the electrical issues, it must be part of the shutoff problem. If it were the injection pump again, it wouldn't start back up at all, right?
*No check engine light and no OBD-II codes (this is why I took it to the dealership so they could check for DRB codes)
*ABS and BRAKE light are on, but I think that's unrelated and a back 4x4 hub sensor.
So...for my sanity...please give me your experiences, suggestions, thoughts, and any other relevant information on the matter. I don't know where to start.
