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Shuts off while driving

Tiny
PAININTHE10
  • MEMBER
  • 1995 GMC SIERRA
V8 four wheel drive automatic 89,090 miles.

My truck is a extended cab with a 350 engine. Just recently it has started shutting off while driving for no apparent reason. I replaced the module for the distributor thinking it may be electrical in nature. No success. I then felt it may be the fuel pump, so I had it replaced with the inline filter as well. Same persistent trouble. When just after initially leaving my house the truck shut off again. When the truck shuts off all gauges go to the left but there are no codes retained in the computer. I am lost! Any help would be greatly appreciated before I purchase a $300.00 ignition. I tried a different map sensor and the truck seemed to work better. It did not shut off when cold. When it had warmed up though it shut off and this morning it seemed like it was going to shut down but only for a moment and then sprung to life and continued on. Help with any suggestions please!
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Wednesday, February 25th, 2009 AT 1:34 PM

16 Replies

Tiny
PAININTHE10
  • MEMBER
  • 2 POSTS
It was a bad ground to the fuel pump.
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+7
Saturday, February 28th, 2009 AT 3:34 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,702 POSTS
Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.
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-1
Saturday, February 9th, 2019 AT 7:45 PM
Tiny
STACYBURGESS
  • MEMBER
  • 1 POST
  • 1995 GMC SIERRA
  • V8
  • 2WD
  • AUTOMATIC
  • 185,000 MILES
Several weeks ago I started experiencing a problem, when I would try to start my truck, it wouldnt do anything. The lights on the dash would come on, but the starter wouldnt engage or make any noise. After multiple attempts, it would finally start right up. Checked the battery cables, ground locations, and other wiring (note: has new battery, alternator, starter plugs, plug wires, distributor cap, rotor button, fuel filter, and pcv valve all less than a year old).
I asked around as this was happening every other day. I came to the conclusion that the ignition switch may have gone bad. Have yet to replace it because now it tries to start and either wont or will not stay running for more than 3 seconds. Occasionally, it will start and run, until I touch the gas pedal and it immediately dies with no sputtering. Sometimes it will start and I can get out and walk away, a minute later it will die. Whats goin on?
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Saturday, February 9th, 2019 AT 7:45 PM (Merged)
Tiny
JAMES W.
  • MECHANIC
  • 2,394 POSTS
Ignition switch could cause your starting problem. To change it could be a cheap fix. On the stalling, I would check the fuel pressure. A bad fuel pressure regulator could cause the problem you described. You didn't mention a check engine light, so I'm assuming you don't have one. If you do, let us know and what the codes are.
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-1
Saturday, February 9th, 2019 AT 7:45 PM (Merged)
Tiny
BOB DAVIDSON
  • MEMBER
  • 6 POSTS
  • 1995 GMC SIERRA
  • 6 CYL
  • 4WD
  • AUTOMATIC
1995 gmc 4.3 motor, starts up fine when cold after you drive it when it gets to a certain spot when its hot it stalls out, let it set for a few mins and it will restart, I added ground cable from battery to block and block to firewall could there be another ground missing somewhere causing this shutdown?
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Saturday, February 9th, 2019 AT 7:45 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
How long since a tune-up? Any applicable codes? When the problem occurs, if it cranks good, but won't start, have a helper crank while you visually check for spark at the plugs. You can carry a known good spark plug or spark tester in the glove-box, it won't get hot, don't pull a plug from the engine. Pull a spark plug wire loose from spark plug. If the spark plug wire is hot, use a glove. Place spark tester in boot, ground metal part of tester to metal part of engine, engine cranking, watch for spark.
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Saturday, February 9th, 2019 AT 7:45 PM (Merged)
Tiny
BABEBOY_06
  • MEMBER
  • 2 POSTS
  • 1995 GMC SIERRA
  • 250,000 MILES
My truck acts like it wants too cut out every time it rains or when I go trough water
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Saturday, February 9th, 2019 AT 7:45 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Change plug wires, cap, rotor and coil. That should solve it

Roy
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Saturday, February 9th, 2019 AT 7:45 PM (Merged)
Tiny
BABEBOY_06
  • MEMBER
  • 2 POSTS
It has all of that brand new a different shop told me too buy some new splash shields because the older ones wasn't on the truck
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Saturday, February 9th, 2019 AT 7:45 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
I do not agree. You have electrical leakage from somewhere. Get a spray bottle with water and spray down the cap and coil while running and look for arcing

Roy
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Saturday, February 9th, 2019 AT 7:45 PM (Merged)
Tiny
GUSALLIS
  • MEMBER
  • 1 POST
  • 1995 GMC SIERRA
  • V8
  • 2WD
  • AUTOMATIC
  • 135,590 MILES
1995 GMC 1500 5.7 FI. When it starts in the morning it immediately dies. Start it again and it stumbles for a bit but picks up and runs. It has Occasional stumblings throughout the day. I changed the fuel filter, put a new tank of gas in it and it cleared up for a week but then started the same thing again yesterday. Fuel Pump or what? Suggestions Please
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+1
Saturday, February 9th, 2019 AT 7:45 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure and comeback with the readings this is where we start
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Saturday, February 9th, 2019 AT 7:45 PM (Merged)
Tiny
BLOMMERSKYLE
  • MEMBER
  • 1 POST
  • 1995 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
My engine acts like it wants to die when I let off the gass, I hasnt died on me yet but I dont want it to. What is my problem and how can I fix it
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Saturday, February 9th, 2019 AT 7:45 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the IACV, TPS and MAP sensors-also check the fuel pressure
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Saturday, February 9th, 2019 AT 7:45 PM (Merged)
Tiny
BGANDBOYS
  • MEMBER
  • 1 POST
  • 1995 GMC SIERRA
Engine Performance problem
1995 GMC Sierra V8 Four Wheel Drive Automatic

I have a 1995 GMC 4x4 pickup. It keeps flooding out and won't stay running. Have replaced all sensors and computer parts. HELP!
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Saturday, February 9th, 2019 AT 7:46 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure to rule out a leaking pressure regulator and clogged return line/sticking injector/s.
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Saturday, February 9th, 2019 AT 7:46 PM (Merged)

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