2001 Chevy Silverado misfire or what?

Tiny
AVIEUX
  • MEMBER
  • 2001 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 124,000 MILES
When u start up the vehicle it may start fine or it may sputter and start or die. And if it does start it has a high idle of 1000 rpm it used to idle at 600 rpm.
sometimes it does idle at 600 but then after u drive it, it idles at 1000 I have changed the plugs, wires, fuel pump, fuel pressure regulator, and put a new fuel filter on. Please help me if u have any questions let me know
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Sunday, June 20th, 2010 AT 6:08 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Clean out the idle air control valve and see what happens
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Sunday, June 20th, 2010 AT 7:10 PM
Tiny
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  • 15 POSTS
There was alot of gunk but it didn't fix it
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Sunday, June 20th, 2010 AT 7:57 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the IACV itself, also test the TPS and MAP sensor
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Sunday, June 20th, 2010 AT 8:00 PM
Tiny
AVIEUX
  • MEMBER
  • 15 POSTS
Ok it started idling correctly but then it didn't it was idling again at 1000 rpm so I reved it and it went back to 600 rpm for the start up it still sputtered but was better, but now there's another problem my throttle started to stick, i'v replaced the map sensor
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Sunday, June 20th, 2010 AT 9:00 PM

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