Engine Stalling

hanson114 · #1 01-25-2013, 02:21 PM

I have a 2006 cummins 2500, smarty, volant cai, and no muffler other than that its stock. It will start just fine plugged in or not but after idling for 5 to 7 minutes it will just shut off like you shut the key off and it would throw the code p 2509 but yet start right back up. first thing i did was cleaned grounds and battery conections, it still did it, i went and bought brand new batterys, it still did it. then i updated my smarty to the newest software and now it still dies but doesnt throw any codes. when it first started getting cold out this fall is when i started having this problem. the truck runs just fine over 25F and dies more and more the colder it is outside. ive been running straight #2 so i thought it was maybe the fca but i havnt done it yet. If anyone can help thank you before hand.

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forgot to mention it also the electronics all shut off while driving down the road but they kick back on after a second

dupster33 · #2 01-26-2013, 12:25 PM

When my FCA went truck wouldn't die. It would almost die and then throttle back up to normal RPMs.

hanson114 · #3 01-26-2013, 02:52 PM

did it throw p 2509 when it did it?

dupster33 · #4 01-26-2013, 04:11 PM

I've been reading about the 2509 code. Could be alt, bad ground, or bad connection to ECU? Most people say it has to do with bad batteries. Let me know what you find.

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P2509

found this thread. Just help you figure it out.

hanson114 · #5 01-26-2013, 05:56 PM

thanks for helping me out i have done both batterys and all the grounds i can find. i dont really know how to check connections to the ecu, i ohm tested the power supplies to the battery and the grounds to the block and everything was good. another thing that confuses me is why does it only do it when its cold? if it was a connection problem y would it only do it when its cold?

Bigg Redd · #6 01-26-2013, 08:06 PM

Try removing the smarty and see if anything changes. Just tossing it out there bro.

hanson114 · #7 01-27-2013, 02:15 AM

i have ran it on stock settings and it still does it

dupster33 · #8 01-27-2013, 09:59 AM

When its cold the connection may be contracting and when the engine warms up the connection could be expanding. I had a simular issue on a motorcycle before.
I would suggest pulling the wire harness off the ECM and see everything looks okay.

Based on the code description I would have to think your problem has to do with the power to the ECM.

hanson114 · #9 01-27-2013, 10:07 AM

i unplugged it once n checked it over n it was fine but i didnt add and di electric grease i didnt know if i should with the ecm being so touchy.

dupster33 · #10 01-27-2013, 10:57 AM

Found some more info. Check out the TSB
Re: P2509
« Reply #8 on: September 23, 2008, 05:01:13 am » possible causes

POOR CONNECTIONS AT THE BATTERIES
LOW BATTERY VOLTAGE
OPEN FUSED B+ TO ECM
OPEN GROUND CIRCUIT
BATTERY + SHORTED TO OTHER CIRCUITS
RETURN CIRCUIT SHORTED
BATTERY + SHORTED TO GROUND

There is a TSB on this 18-001-07

hanson114 · #11 01-27-2013, 11:32 PM

ive also seenthat on cummins forum but none of that fixed it

Bigg Redd · #12 01-28-2013, 11:33 AM

Originally Posted by hanson114

i have ran it on stock settings and it still does it

I mean completely disconnecting it bro, not just switching to stock settings.

hanson114 · #13 01-28-2013, 09:45 PM

yeah sorry ive had the smarty totally off my bad it still does it though i put electric grease on the ecm plugins yesterday now i just have to wait for it to get cold but i heard it could be anything from the lift pump to the ecm so far and i wish someone could narrow it down a little more but we will have to wait and see

Bigg Redd · #14 01-28-2013, 11:34 PM

how about the Air Temp Sensor crapping out. That tells the ECM how cold it is, and the ecm controls other functions based on air temp. Just tossing out another one......

hanson114 · #15 02-25-2013, 10:57 PM

so sick of this issue i brought it in and they couldnt figure it out either so thats always nice

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