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L5P will barely start, then die Please Help
I'm still stuck on what is telling the ECM to command a much higher fuel rail pressure than is needed? I'll look at the reductant system in the morning and report back. The truck is much worse than in limp mode. It struggles to start and will barely run. -
L5P will barely start, then die Please Help
Not sure if this data helps. I did pull the map sensor and it was covered in soot. Cleaned and re-installed, no change. -
L5P will barely start, then die Please Help
The ecm was unharmed in the wreck. I also removed it from the truck and stored it inside while the truck was being repaired. -
L5P will barely start, then die Please Help
I first removed the DPF ( at the rear ) and I had a little change. It would still struggle to start, but would not immediately die. Not any better with the doc removed from the back of the turbo -
L5P will barely start, then die Please Help
I have the DOC off the back of the turbo. It will start, but is pretty much the same as it was, maybe just a tad bit better? Still Won't really gain any rpm. The inside of the doc is all in tacked and does not appear to be clogged up at all. I can shine a light in one end and see it in the other. -
L5P will barely start, then die Please Help
What would tell the ECM to command much higher than needed fuel rail pressure? The attached screen shot is with the engine about 600rpm -
L5P will barely start, then die Please Help
The high fuel pressure is very erratic and well as the maf reading. -
L5P will barely start, then die Please Help
Where are these located? The only plug on the HP4 pump is the regulator. -
L5P will barely start, then die Please Help
Where would I find the fuel temp and fuel pressure regulator plugs? The one on the high pressure fuel pump or the left fuel rail? -
L5P will barely start, then die Please Help
I removed the DOC from the turbo this morning and fired it up. Still struggles to gain rpm. Still high fuel rail pressure. -
L5P will barely start, then die Please Help
James, Thanks for the input. This is my first new diesel diagnostic venture, so I am learning tons. The MAF sensor is original factory. It was undamaged in the wreck. It jumps around a bunch but seems to read between 20-30 g/s I have not found the pressure differential sensor in my new scan... -
L5P will barely start, then die Please Help
This truck is 100% stock. I have scanned all modules and the only code I have is the P0016. I have not pulled the exhaust off the turbo. The truck was running fine after the rebuild for 15 miles or so. This problem came on suddenly and got worse within 3-4 miles to the point of the engine... -
L5P will barely start, then die Please Help
I have. I have also performed the test procedure laid out if you have a P0090. I can watch the test light go from dim to bright as I turn on and off each of the regulators. -
L5P will barely start, then die Please Help
Anyone have any ideas? I'm grasping at straws. Could the ECM be bad? -
In need of some guidance
Don, I'm curious, did you ever figure out what was going on with this thing? -
Electrical issues
I would try disconnecting both batteries. Get a small jumper wire and connect the positive and negative terminals together and let that sit for an hour or overnight. This will discharge all capacitors in the truck. Reconnect and maybe clear all the codes with a scan tool. -
L5P INJECTOR QUESTION
I just did my first injector job on my L5P. I removed the EGR pipe. Out and in probably took 3 hours. Programming another 30 mins. -
L5P will barely start, then die Please Help
The alignment pin for the timing gear on the crank was undamaged. The pin for the balancer/pulleys was sheared off. I replaced it as well as adding one for the oil/water pump gear. -
L5P will barely start, then die Please Help
Hey guys, I have been having issues with a current build. I have been posting over on duramaxforum and I thought I would come on over here to see if you guys have any ideas. I bought this wrecked two years ago and have been slowly building it. It took a frame swap and a lot of work to get it...