wont stay running once started

98,000 MILES • 4WD • AUTOMATIC
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S MAN
  • MEMBER
  • 2 POSTS
2000 chevey suburban starts then stalls. did pump lastnight,drove it home .next day didnt start again.
Dec 25, 2010 at 8:16 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Do below to determine if its fuel or spark problem-

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if so, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
Dec 25, 2010 at 11:44 PM
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S MAN
  • MEMBER
  • 2 POSTS
thank you so much!!! ill get started on my journey...
Dec 26, 2010 at 10:51 AM
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