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2000 Chevy Silverado running rough

Tiny
MONTE327
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 231,000 MILES
Truck wouldnt start, did tune up. Plugs wires cap rotor. Still wouldnt start, it was fuel pump, replaced it. 3 days later runs really rough when cold, fine when warm. A month into this thought maybe pump was faulty so I took it back got a new one, no change. Replaced throttle position sensor, prior to that removed the wiring harness and it ran fine, plugged in back in ran poorly, so I replaced tps, no change. Also when it rains it wont start 80% of the time please help!
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Saturday, October 30th, 2010 AT 10:01 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
Are you getting a good hot blue snapping spark to the plugs?
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Monday, November 1st, 2010 AT 11:24 AM
Tiny
GPLOH
  • MEMBER
  • 2 POSTS
I havent checked for that. I know have determined it runs rough only when wet and or rainy outside. 3 in the afternoon it doesnt do it. Crack in cap? Crank sensor bad?
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Wednesday, November 17th, 2010 AT 7:32 PM
Tiny
BILLMORGAN
  • MEMBER
  • 1 POST
I am having the same problem with my 2000 silerado. Runs rough when wet, and if it sits over a 24hr period without starting it, it won't start. New fuel pump, fuel injector, plugs. Any ideas? Wiring shorting out from wetness?
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Friday, March 11th, 2011 AT 6:59 PM

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