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Why do the RPM's race?

Tiny
MAZDA2000PROTEGE
  • MEMBER
  • 2000 MAZDA PROTEGE
  • 110,000 MILES
2000 mazda protege with 1.6L 5speed, when cold it runs great but once warm the RPMs rev up and fall almost cutting the car off. I checked for vaccum leaks, and found nothing. But when I pull off the vacuum line coming off the intake manifold going to the solenoid between the manifold and the canister. It runs great but with a loss of power. So I replaced the solenoid between that line and the canester. And still the same thing. Plz help
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Wednesday, September 14th, 2011 AT 9:43 AM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Have the throttle body and IAC cleaned and retest.
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Wednesday, September 14th, 2011 AT 4:26 PM
Tiny
MAZDA2000PROTEGE
  • MEMBER
  • 2 POSTS
Ok, I want to start by saying thank you for helping. I cleaned the throttle body and IAC. But still having the same problem. Do you know of any thing else to check?
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Thursday, September 15th, 2011 AT 4:12 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Have the valve clearances checked to see if they are within specs.
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Thursday, September 15th, 2011 AT 1:12 PM

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