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1997 Chevy S-10 '97 S-10 4.3ltr engine shuts off while drivi

Tiny
FLORIDATIDE
  • MEMBER
  • 1997 CHEVROLET S-10
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 174,000 MILES
My '97 s10 p/u with 4.3 ltr starts fine and runs fine most of the time. While driving, the engine will shut off with no warning (no vibrations, misfire, hesitation, etc.). It will restart while coasting after about 30 seconds of trying. It will continue to run fine for no determined time period, then 'die' again. Can repeat the procedure over and over. I have replaced the camshaft position sensor, rotor, dist. Cap, spark plugs, and ignition module. There are no fault codes being recorded by the engines computer. Help is greatly appreciated!
Thanks
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Tuesday, May 12th, 2009 AT 2:56 PM

7 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
Fault maybe the fuel pump does it shut off like you turned the key or just slow to a stop? Have you checked fuel pressure?
Let me know
Thanks for donate
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Wednesday, May 13th, 2009 AT 10:01 AM
Tiny
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Wednesday, May 13th, 2009 AT 10:36 AM
Tiny
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The engine stops like you turned the key off. I have not checked the fuel pressure. I can not hear the fuel pump energizing after I turn on the switch before cranking. In my Astro, I hear the fuel pump with no problem. I just got this vehicle from my dad, so I don't know if the fuel pump in it was ever loud enough to hear. Thanks
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Wednesday, May 13th, 2009 AT 11:43 AM
Tiny
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The engine stops as if you had cut it off with the key. I have not checked the fuel pressure. Does the fuel pump on this truck make an audible sound when it is energized? I do not hear any sounds from it before I start the engine. Thanks
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Thursday, May 14th, 2009 AT 6:42 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Truck not staying down long enough to see if it is spark or fuel that goes away is a bit of a crap shoot.
Seems like you've been through ignition well so maybe pump? Some pumps are quiet and you almost need ear to tank to hear. When it dies don't try and restart till stoped but you will need an accomplies crank see if spark
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Thursday, May 14th, 2009 AT 8:15 AM
Tiny
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The S10 finally stopped running at all. It does have a spark while trying to crank. I got a fuel pressure gauge. When I hook up the gauge and turn key all the way before engaging engine, the gauge reads 50 psi. When I press the flow thru switch on the gauge, the pressure drops to zero. I can turn off the key and go back to on without cranking position, and the gauge again reads 50 psi until I open the flow thru switch. Am I correct in thinking that the pump should be pressurized at this point? Do I need to replace the pump? Thanks!
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Monday, May 18th, 2009 AT 2:51 PM
Tiny
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Check out puessure regulator it maybe returning fuel to tank.
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Tuesday, May 19th, 2009 AT 9:24 AM

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