2006 Dodge 5.9 Diesel wont start !!!HELP!!!! - Dodge Cummins Diesel Forum

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Old 01-24-2013, 11:23 PM   #1 (permalink)
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2006 Dodge 5.9 Diesel wont start !!!HELP!!!!

I just purchased a 2006 Dodge ram 2500 5.9 Diesel with 123k Miles. I drove the truck home 525 miles. i stopped twice for fuel and motor started no problem. while i was driving(1 hour away from home) i noticed a slight miss for about 3 seconds. it was so slight I starting second guessing myself then it was fine the rest of the trip home. The next morning i went to start it to do a few things and the motor just turns over(normal speed) but wont start. when i turn the key on i can hear the lift pump turn on in the fuel tank. I also cracked the fuel line before the injectors and fuel is coming out. i checked the codes p0336 and p0541. p0336 is the first code which is the crank sensor. i Just bought a new cranks sensor thinking it would be fixed and it still wont start. I live in sunny San Diego and the temp is 70 deg outside so i dont think the intake heater A circuit low would affect it. After further research im guessing there might be an open circuit going to the computer.

The truck would fire right up after fueling up. crank maybe 2-3 times and it was running perfect.
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Old 01-25-2013, 12:34 AM   #2 (permalink)
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I had an intermittent no start on my 2005.. Chased it down for a year as this did not happen very often..

Ended up being a bad Fuel Rail Pressure Sensor. It never did set any codes...

You could pull the connector off and check for any corrosion.

Just a stab in the dark for you!
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Old 01-25-2013, 01:19 AM   #3 (permalink)
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Try disconnecting the fan clutch and see if it starts. I've heard a bad clutch can cause a similar problem.
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Old 01-25-2013, 01:54 AM   #4 (permalink)
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thanks for the help ill try that tomorrow
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Old 01-25-2013, 05:52 AM   #5 (permalink)
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Get the cold cranking rail pressure measured.
these will not start if RP is below the cutoff start RP, ECM will not turn on the injector pulses, no pulses no diesel squirty.

common problem in these high mileage Dodge Cummins that have not had the loving care of a meticulous owner who ONLY feeds it absolutely clean and NO water fuel plus runs the best filtration and water separator.

best choice to take it:
1. several specialized disel pickup shops in SD that do R Cummins.

2. last resort Dodge dealer shop, have them ONLY measure the cold crank start RP and if they get it started, the cylinder contribution test.

Post results here of tests.

You're at the mileage of worn out tit nipple leaker injector nozzles, hard starts and a quick engine killer
and of leaking injector return valves, hard starts and poor performance.

Crank sensor wiring is often damaged by a broken flying fan belt. can't easily be seen. same as smashing the new sensor, no worky.
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Last edited by steelhead01; 01-25-2013 at 06:40 AM.
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Old 01-25-2013, 06:18 PM   #6 (permalink)
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steelhead you were right. I took it to a dodge mechanic in san diego and the rail pressure is 700lbs suppose to be 4000. waiting for them to dig in deeper to the situation. will keep you all posted
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