car stall out seems hot

1992 PONTIAC SUNBIRD
940,000 MILES
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PHILLIO
  • MEMBER
  • 1 POST
Car runs finefor about 40 miles then go to stop loses power and stalls but starts back up hard to stay running. Replaced water pump and thermostat timing beltany suggestions
Apr 28, 2013 at 9:20 AM
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FREEMBA
  • ✓Experienced Mechanic
  • 1,152 POSTS
check the fuel pressure when the engine is running, driving and after it stalls. It should be the same or a little higher during those times.

Also, Is the "check engine light" on?
Apr 28, 2013 at 9:48 AM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,407 POSTS
You might want to consider a collapsing pickup screen in the fuel tank or a plugged fuel filter. Those will cause stalling when the pump needs to move the highest volume of fuel, which during coasting. When sufficient volume can't be achieved, the pressure drops to the point it causes stalling. The clue is the engine will restart but probably is little hard, and it will act up the next time in less time and miles than the first time. It will also run okay when a lower fuel volume is needed which is at highway speed.
Apr 28, 2013 at 10:15 AM
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