I ordered another new LP from Cummins today, it will be in by tomorrow a.m.

I went & tried to start again tonight. Bumped the starter to cycle the LP 3 times first.
First bump FP gauge pegged @ 15psi
2nd bump 5psi
3rd 2psi

Truck didn't start. I left it for a few minutes and tried again. The FP would still only go up to between 1.5 & 3 psi.

The pressure with LP running should stay constant @15+ shouldn't it? Does having primed the lines alreadt & no start affect LP pressure after that?

Does this make any sense?

 

Check for leaks. IF no leaks, I think you will be happy with the new [again] pump.

Scotty

*edit*

IS the truck running with these pressures? Does it start at all?
With starter bumped how long does the lift pump run and what pressure? Does the pressure drop?

 

There was a leak at the Fuel Filter Housing inlet. I tightened it up and tried again.

It has still never started.

The LP runs for about 30 seconds, the pressure does drop while running

 

How full is the fuel tank? It may be sucking air in there if there is a leak in the pickup line. Maybe throw in a couple gallons.

 

It is @3/8's. I do have a half full slip tank in the box so I can try filling it up.

 

Update:
I got the truck started. Picked up the new LP @ the bus depot this a.m. but decided to try to start it again before I changed the LP. Had the block heater plugged in for a few hours first try it didn't start.
I pumped in another half tank of fuel and tried again. 3rd attempt it fired just as I was about to give up. Fuel Pressure @ 14.5lbs.

I let it run for a half hour or so, shut it down for a few minutes and it fired right up. I do however have a check engine light and get codes P 0500 & P 1693 again.
I had been having problems with the remote starter flashing codes and occasionally not starting for a while as well. It seems to be a problem at the hood pin connection.

Could the remote starter be setting off codes in the ECM? I have removed the neg. battery cables now to try and reset the codes. I'll see what happens when I go back out to try again.

 

Truck fired up right away.

I drove down to Calgary today, left truck sitting for 3 +1/2 hours. It took about 10 seconds of cranking to start again. Once running it is great. Fuel pressure goe sright up to gauge limit at 15psi and pretty much stays there except for WOT down to 11.5 psi at the lowest. (Thanks I'd say to the Max Flo system) No stumble at any point.

Got home shut down and restarted 3 times - no problem.

Could it be a fuel pick up problem? Problem with initial combustion/Ignition?

I need to get this figured out. Monday I drive to Fort MacMurray and I definitely don't want to be stranded along the way!

 

It acts like there is a small leak somewhere along the way.. I would check maybe the fuel filter can gasket and the lines from the tank again.. If you can get underneath and see if you can see a wet spot on top of the tank.. I am wondering as other have said if the tank connections have got a leak too.

Command start... Uh boy.. I really am not a fan of those things as I had nothing but trouble with them.. Just hacked into the harness (usually) and can cause some problems as the Dodge harness and PCM are pretty sensitive to wayward voltages. If you can, find the fuses for the Command start and pull em. Reset the codes and see if they come back.

Glad to hear you got it off the lawn anyway..

J-eh

 

Thanks Jason. I was going to take it back to where the command start was installed and have them check it out.

Also I think I am going to take it to Doc Mechanical in Blind Man industrial park tomorrow with info I printed off regarding tank issues. I was referred to him by a buddy.

There is also supposed to be a really good diesel guy in Blackfalds according to Dave at Cruisin' Auto in Red Deer, do you know who it might be?

 

Sorry no I don't know that gentleman in Blackfalds...


I took another run at your codes on the OBDII website. The P1693 code is something to do with the Tachometer..

I am wondering if maybe the Crank sensor is acting up or there is a loose wire around there. I am not sure if the Command Starts sense the tach speed or not so we may be on the right track here.

Keep us updated..

 

Ok here's todays update.

Took it to Doc's Heavy Duty Mechanical. Don is a great guy and spent alot of time going over my problems, what I had done, etc..

Truck was still hard to start after it cooled down (20 min+) but it would start then run great. FP good, nostumble @ any RPM. All fuel lines appear good, no leaks.

Don figured it had to be either fuel return or Injection Pump. We also took the TST off completely (previously had just been swithched off). He did not have a code reader and sent me to the dealer to have them scanned.

Codes: P 0500, P 1693 & (gulp) P 0216

Reset the codes then went and spoke with the diesel tech. He does not think it is the injection pump, that I am getting air in someplace and losing prime. Possibly even bad injector O-ring. He told me to drive it and when I park it to park it facing downhill and see if it starts easier.

I tried that tonight (not a steep grade) and it was still a hard start. I have now filled the tank (it was around 1/4) and will wait a while to try it again. If it still is a hard start I am going to park it on a steeper grade and see if there is any difference.

Ran the codes by key method again and just came up with P 0500 - Speed Sensor - again. I will take it in for a code scan again tomorrow and see if the P 0216 pops up on theirs again. still

 

This morning with a full tank & still parked slightly nose down it fired up almost immediately after sitting all night. It was not plugged in.

Moved it toa slightly nose up position and will let it sit for 30 min or so to try again.

What would it mean if starting was dependent on tank fuel level? The Pick up in the tank?

Again, once running it is fine.

 

Most likely have a crack in the pickup that is letting air in.

Or, the fuel sender isn't working right, and instead of 1/4 tank you were actually empty.

Either way, replacing the pickup/fuel sender (all in one unit) should fix it.


phox

 

Thanks, Phox! I may have to try that today. Is replacing that unit hard to do?

The sender seems OK. Pretty much right on for what I pumped for it to go from 1/4 to full.

I'll start calling around for prices.

 

Be prepared for sticker shock.

Pretty sure it is only available from Dodge.

Tank full, lift the bed to get to it.

Tank empty, drop the tank to get to it.

Actually, lifting the bed is probably the easiest.

Do a search for fuel sender, many have replaced their's recently and told the tale.


phox