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94 Chevy idle sticking

Tiny
SLAMMED94
  • MEMBER
  • 1994 CHEVROLET SILVERADO
  • V8
  • 2WD
  • MANUAL
  • 164,000 MILES
I have a 94 Chevy I just bought. The truck has 164000 is a 5.7 5 speed. I have just replaced iac, thermostat, temp sensor, sending unit, tps, checked tps voltage, cap rotor, and refined engine. The problem I can not figure out is sometimes it idles 1100 sometimes 1500 and when I get off the freeway or have a lil heavy foot it sticks at 3000 rpm. I can shut off truck restart and it goes back to normal for awhile. Any input on where else to go with this?
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Monday, March 14th, 2011 AT 4:49 AM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Do you think the throttle cable is sticking? Maybe you need to clean the throttle body and throttle shaft? Any applicable mil codes? Test the maf/map sensor where applicable. Sometimes with a cold engine, it will idle a little higher. I don't like anything hanging up at 3K rpms!
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Saturday, May 21st, 2011 AT 3:43 PM

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