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1996 Mazda 626 Reving of the engine

Tiny
SDJAQUET
  • MEMBER
  • 1996 MAZDA 626
  • 6 CYL
  • 2WD
  • MANUAL
  • 135,000 MILES
When my car has been driven for a while and is sufficently warm, the car will rev up and down between 1000 and 2500 RPM's. It does this when I am stopped and the car is in first with the clutch all the way in or when the car is not in gear and I am stopped. Once I release the clutch and begin to move, the problem stops? It seems that as I drive it more, it is revving up and down less but now is consitantly around 2000 RPM's when stopped. This seems hight to me. A friend of mine thought I might have a cracked vaccum hose. Any thoughts?
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Wednesday, February 20th, 2008 AT 4:15 AM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Could be a vacuum leak, spray around the vacuum lines carefully with carb spray, if the idle changes, you found a leak. Also clean the inside of the throttle bore (around butterfly) with carb cleaner and a rag, this will help stabilize idle, as well as cleaning the Idle speed control motor with carb spray
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Wednesday, February 20th, 2008 AT 7:59 AM

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