1994 Chevy S-10 stalls

Tiny
SYNERGYTECH
  • MEMBER
  • 1994 CHEVROLET S-10
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 93,000 MILES
My 94 s10 runs good at highway speeds, fast acceleration between 70 and 80, but when coming to a stop, when it reaches a certain low rpm it dies and at that point it takes starting fluid to restart unless it sets for awhile.I installed a new fuel pump, filter and regulator, no codes are showing but 12, it never malfunctions at running speeds.I don't think any parts I installed were really needed.
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Tuesday, August 17th, 2010 AT 7:05 AM

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Tiny
WRENCHTECH
  • EXPERT
Is this a Vortec engine?

You can tell by the 8th digit of the VIN#
It will be a "W" or a "Z"
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Tuesday, August 17th, 2010 AT 7:42 AM
Tiny
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The eighth number is a Z
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Tuesday, August 17th, 2010 AT 4:58 PM
Tiny
WRENCHTECH
  • EXPERT
That means you have a low pressure TBI fuel injection system. The only thing I could suggest is to check the EGR valve for any carbon holding it open. If it was just stalling I would say clean the throttle body and replace the IAC but that won't do anything for the hard starting problem. Double check your fuel pressure. It should be 9 to 13 PSI.
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Tuesday, August 17th, 2010 AT 5:19 PM
Tiny
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It has very snappy acceleration at highway speeds, this system has no schrader valve for checking the fuel pressure, I forget to mention it also has a new IAC valve that made no difference.I will however take a look at the egr valve.I checked the injectors with a light and they do not pulse at all while cranking after the engine has died unless it has cooled down for a while.
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Tuesday, August 17th, 2010 AT 8:41 PM
Tiny
WRENCHTECH
  • EXPERT
That tells us a lot. If your getting no pulse, then your likely looking at an ECM problem or a shorted fuel injector that's overloading the quad drivers in the ECM.
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Tuesday, August 17th, 2010 AT 8:45 PM
Tiny
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I stopped and talked to a mechanic today on the way home and he said to check the coolant sensor. He said it could be telling the pcm the engine is too hot. So I'm going to check that today.
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Wednesday, August 18th, 2010 AT 3:19 PM
Tiny
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The coolant sensor checked ok so I guess it wasn't that.
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Wednesday, August 18th, 2010 AT 8:27 PM

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