96 5.7 vortec stalling?

greme · 08-19-2007, 09:15 PM

i have a 96 3500, 350/auto. the truck just shuts off periodically while driving.
sometimes it starts right back up, but other times it takes a while.
it has dual tanks, but i abandoned the rear tank b/c the filler pipe was rotted out . the fuel gauage only read 1/2 when i fill up the front tank, but the needle flutters, back and forth real fast. i have a feeling it has something to do with the fuel pump/gauge. any thoughts?

mrjohnwayne · 08-20-2007, 08:37 AM

could be the pump. but I'd check the relay first.

greme · 08-20-2007, 02:39 PM

well the truck ran good today. if the pump went, wouldnt it just die and not run? it seems like a loose wire or connection of some sort. just the thing to make it hard to trouble shoot.

mrjohnwayne · 08-20-2007, 02:42 PM

they can act wierd. It might be overheating causing it to stop working, then once cooled down works again. Since your gas gauge is inaccurate if you are running the tank below 1/4 you do not have enought fuel in the tank to keep the pump cool. The gas in the tank is what keeps the pump cool.

But It could just be the relay overheating as well. I would change the relay (pretty cheap) and see what happens.

you know it could also be the wire harness/connection for the pump at the tank as well. There have been problems with them shorting out at the connection. If you do end up replacing the fuel pump get a new harness too.

greme · 08-31-2007, 03:24 PM

in case anyone was curious, the ignition switch had to be replaced

mudseeker · 08-31-2007, 09:38 PM

thanks for posting the solution to your problem. not to many people do once they got it figured out. glad you got it figured out.

mrjohnwayne · 09-04-2007, 08:09 AM

Good deal. Glad you got it running right again!

08-19-2007, 09:15 PM	#1
greme Junior Member Join Date: Feb 2005 Location: CT Posts: 7	96 5.7 vortec stalling? i have a 96 3500, 350/auto. the truck just shuts off periodically while driving. sometimes it starts right back up, but other times it takes a while. it has dual tanks, but i abandoned the rear tank b/c the filler pipe was rotted out . the fuel gauage only read 1/2 when i fill up the front tank, but the needle flutters, back and forth real fast. i have a feeling it has something to do with the fuel pump/gauge. any thoughts?

08-20-2007, 08:37 AM	#2
mrjohnwayne Senior Moderator Join Date: Apr 2005 Location: Texas Posts: 3,722	could be the pump. but I'd check the relay first. __________________ John Wayne 2000 F-350 7.3L Powerstroke 4x4

08-20-2007, 02:42 PM	#4
mrjohnwayne Senior Moderator Join Date: Apr 2005 Location: Texas Posts: 3,722	they can act wierd. It might be overheating causing it to stop working, then once cooled down works again. Since your gas gauge is inaccurate if you are running the tank below 1/4 you do not have enought fuel in the tank to keep the pump cool. The gas in the tank is what keeps the pump cool. But It could just be the relay overheating as well. I would change the relay (pretty cheap) and see what happens. you know it could also be the wire harness/connection for the pump at the tank as well. There have been problems with them shorting out at the connection. If you do end up replacing the fuel pump get a new harness too. __________________ John Wayne 2000 F-350 7.3L Powerstroke 4x4

08-31-2007, 09:38 PM	#6
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,374	thanks for posting the solution to your problem. not to many people do once they got it figured out. glad you got it figured out. __________________ i'd rather be hunting

09-04-2007, 08:09 AM	#7
mrjohnwayne Senior Moderator Join Date: Apr 2005 Location: Texas Posts: 3,722	Good deal. Glad you got it running right again! __________________ John Wayne 2000 F-350 7.3L Powerstroke 4x4

08-20-2007, 02:39 PM	#3
greme Junior Member Join Date: Feb 2005 Location: CT Posts: 7	well the truck ran good today. if the pump went, wouldnt it just die and not run? it seems like a loose wire or connection of some sort. just the thing to make it hard to trouble shoot.

08-31-2007, 03:24 PM	#5
greme Junior Member Join Date: Feb 2005 Location: CT Posts: 7	in case anyone was curious, the ignition switch had to be replaced

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