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02 gmc 2500 start shut off


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lumberjack_43
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Jan 7, 2012, 1:36 PM

Post #1 of 20 (2845 views)
  post locked   02 gmc 2500 start shut off  

I have a 02 gmc 2500HD 6 liter gas engine 280,000 km on it if i leave it in the shop for the night it will start if i leave it out in the cold for the night it starts and shuts off after running for about 5 seconds I took the truck to gm had the module changed and reprogrammed changed the spark plugs before the problem started but thats not the problem as i put the old ones back in and it made no difference


Hammer Time
Ultimate Carjunky / Moderator
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Jan 7, 2012, 1:40 PM

Post #2 of 20 (2838 views)
  post locked   Re: 02 gmc 2500 start shut off  

Put a fuel pressure gauge on it the night before and observe the pressure while trying to start it in the AM.



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lumberjack_43
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Jan 7, 2012, 1:44 PM

Post #3 of 20 (2831 views)
  post locked   Re: 02 gmc 2500 start shut off  

You wouldnt think that would be it if it will start in a warm shop though right? Maybe il grab it from work monday and try it out


Hammer Time
Ultimate Carjunky / Moderator
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Jan 7, 2012, 2:08 PM

Post #4 of 20 (2821 views)
  post locked   Re: 02 gmc 2500 start shut off  

OK, if you don't think that would be it, don't do it. I can help someone else instead.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



lumberjack_43
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Jan 7, 2012, 2:33 PM

Post #5 of 20 (2815 views)
  post locked   Re: 02 gmc 2500 start shut off  

lol like i said i will try it


Hammer Time
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Jan 7, 2012, 3:25 PM

Post #6 of 20 (2808 views)
  post locked   Re: 02 gmc 2500 start shut off  

This is a high pressure system that is extremely sensitive to fuel pressure, especially in colder weather when it needs a richer mixture. The pressure must remain above 55PSI at all times.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



lumberjack_43
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Jan 7, 2012, 3:32 PM

Post #7 of 20 (2804 views)
  post locked   Re: 02 gmc 2500 start shut off  

I hope that is all I got this truck for 600 bucks because the guy couldnt fix it lol


Hammer Time
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Jan 7, 2012, 3:37 PM

Post #8 of 20 (2802 views)
  post locked   Re: 02 gmc 2500 start shut off  

Just make sure you are checking the pressure at the moment you are having the problem.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



lumberjack_43
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Jan 7, 2012, 4:23 PM

Post #9 of 20 (2793 views)
  post locked   Re: 02 gmc 2500 start shut off  

the fuel pressure was at 55 psi when it shut off


Hammer Time
Ultimate Carjunky / Moderator
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Jan 7, 2012, 4:25 PM

Post #10 of 20 (2789 views)
  post locked   Re: 02 gmc 2500 start shut off  

You said you had a problem when it sat overnight. I don't know what time zone you're in but I seriously doubt it's morning there.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



lumberjack_43
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Jan 7, 2012, 4:28 PM

Post #11 of 20 (2784 views)
  post locked   Re: 02 gmc 2500 start shut off  

ok sorry it will start if left inside for the night but if you let it get cold it wont stay running


lumberjack_43
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Jan 7, 2012, 4:30 PM

Post #12 of 20 (2780 views)
  post locked   Re: 02 gmc 2500 start shut off  

If its in a heated shop it will start and stay running drive it what ever but if you shut it off and it cools down it will not stay running run for about 5 seconds and shut off and when i tested it when it shut off it was at 55


Hammer Time
Ultimate Carjunky / Moderator
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Jan 7, 2012, 4:30 PM

Post #13 of 20 (2779 views)
  post locked   Re: 02 gmc 2500 start shut off  

Leave it out and see what the pressure does in the morning as it is being started.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



lumberjack_43
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Jan 7, 2012, 4:36 PM

Post #14 of 20 (2774 views)
  post locked   Re: 02 gmc 2500 start shut off  

Excuse my ignorance just a question but why would it make a difference if i tested it right now or in the morning as it will do the same thing in the morning as right now?


lumberjack_43
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Jan 7, 2012, 4:41 PM

Post #15 of 20 (2772 views)
  post locked   Re: 02 gmc 2500 start shut off  

Sorry there was a mistake there this truck as about 20 mins away from me and im doing this over the phone while talking to my father he said when it first started it was at 55 then it went up to 64 then it shut off


Hammer Time
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Jan 7, 2012, 4:52 PM

Post #16 of 20 (2765 views)
  post locked   Re: 02 gmc 2500 start shut off  

This is going to be impossible if you aren't where the truck is. There is no magic answer. I could guide you through some testing but if you aren't with the truck, that isn't going to work.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



lumberjack_43
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Jan 7, 2012, 4:54 PM

Post #17 of 20 (2761 views)
  post locked   Re: 02 gmc 2500 start shut off  

Ok I will try and contact you monday I'm going to try the old module again as it was changed because of a draw somewhere by the previous onwer if that dont work im going to tow it home monday after work and go from there


lumberjack_43
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Jan 10, 2012, 12:31 AM

Post #18 of 20 (2724 views)
  post locked   Re: 02 gmc 2500 start shut off  

So it was the i forget the first letters under the dash module new one had faults i guess? put the old one back in and she runs great!


braxxtonn
New User

Nov 10, 2012, 8:08 PM

Post #19 of 20 (2395 views)
  post locked   Re: 02 gmc 2500 start shut off  

hey guys i was surfing the web looking for solutions, AND MY TRUCK has the same problem as the one listed in this thread, it's a 94 gmc 2500 gas, newer fuel pump fuel filter, did wires, coil, cap, plug, rotor, and that lil chip under the cap 2 years ago when it was missing on spark, and with in th last 2 months It has started to act up and miss on the spark, It all started a lil while after i got a rebuilt tranny put in, 1st my speedo started to glitch out , it will work some times and other times it's bouncing around or buried at 140K,, then my truck started to sputter like it was missing on spark I discovered that if i flip the cruize control on and then off it will run fine, and then this morning the weather has got cold and it's like minus 20 I started my truck and it was idoling like Sh!t like i was missing on spark alot, so I flipped the cruize control on and off a few times and pumped the gas a bit and it started to idol good, drove it a few block to my friends house and left it running to let it warm up and then it died on its own, and now when I try to start it it will start run for 5 sec and then die, and if I start it and keep pumping the gas it will kinda stay running but is sputtering all to Sh!t,

I am very stumped here and don't really know where to start, I was thinking of going with a new rotor, cap and that lil modualor chip thing that is under the cap, and also the speed sensor, SOMEONE PLEASE HELP ME OUT HERE!!!!
thanks
Randy
Oh and hey what was the problem of your truck listed in this thread ????????????
THANX


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 10, 2012, 8:40 PM

Post #20 of 20 (2390 views)
  post locked   Re: 02 gmc 2500 start shut off  

This question is nearly a year old. If you need help with something, then please start a new question of your own.

Read this before posting.


http://autoforums.carjunky.com/...ORE_POSTING_P122997/



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







 
 
 






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