CRD Random Stalling-Self Starts When Moving

mk38tech · **Joined:** Thu Dec 08, 2011 7:25 pm **Posts:** 72

i still think the vacuum would be able to pull air in, depending on the lift pump pressure

NorthwoodsMike · **Joined:** Sat Jan 23, 2016 11:00 pm **Posts:** 39

Lots of cars have had fuel pumps close to the engine. Over the history of automobiles, probably more have had it than not. If you fix the fuel line fitting leak, I see no reason why an external pump would be any less reliable. It certainly would be more serviceable. I will concede that an in tank pump will last longer, as fuel keeps it cooler via thermal mass, but they are expensive. I picked up an airtex diesel fuel pump that produced the same output as the airtex tank model. Cost? $30. I doubt I will ever go through enough pumps to exceed the $200 cost of an in-tank.

But then again, my diesel is randomly stalling.

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rankom · **Posted:** Sat Feb 27, 2016 5:15 pm

well i don't know , but when i was a kid i remember i seen people driving cars with fuel tanks on roof racks i didn't know why but i guess they didn't have a lift pump ( this was a citroen 2 cyl and renault 4 cylinder and fiat cars ,,, but that was cool that they limp home all the time . i miss them

WWDiesel · **Posted:** Sat Feb 27, 2016 9:49 pm

Any fuel pump mounted anywhere other than inside the fuel tank can suck air on the suction side if there is any leakage at a fitting or hose clamp and induce air into the fuel system. That is why an in-tank fuel pump is such a great addition; any leak anywhere between the fuel tank and the CP3 injection pump will be self evident very quickly (visual fuel leak) since the entire fuel system is under a positive pressure of ~14 psig...

Well worth some additional money for a solid reliable fuel system.... :wink:

NorthwoodsMike · **Joined:** Sat Jan 23, 2016 11:00 pm **Posts:** 39

I'm finally back on this project. I got the torque pro app, and I think it may have discovered the issue. I have 3 codes. B2TAE which I'm having trouble finding info on. The two other codes are P1614 and P0513-which seem to be related to the sentry key system. If the key or module is going, that would explain the shutoff. I'm hopeful.

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NorthwoodsMike · **Joined:** Sat Jan 23, 2016 11:00 pm **Posts:** 39

My hope was short lived. The jeep only came with 1 key, so I had to go to the dealer to get additional keys(from amazon) programmed. I mentioned the issue to the tech, who said that the sentry key system is only active upon initial startup, so that wouldn't cause stalling when driving.

The more it happens, the more I'm thinking there must be a short somewhere, as whenever it stalls, it does a full system reset, in that cruise control resets if it is active. I'll probably start by cleaning the computer connections, and tracing wires after that.

ebbnflow · **Posted:** Fri Mar 18, 2016 3:32 pm

When I had a key die on me, the jeep would start and run for 3 seconds and then it would die. Red light on dash would blink continuously.

Having 2 or more programmed keys is a good thing. You can program your own new keys if you do. I keep 3 programmed keys always in case another ones dies I can program my own without needing a locksmith or the stealership.

CRD Random Stalling-Self Starts When Moving

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