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?
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
Was this
answer
helpful?
Yes
No
Wednesday, February 20th, 2008 AT 7:59 AM

Please login or register to post a reply.

Related Engine Revs Up Content

Idle Air Control Motor Replacement
GUIDE
Idle Air Control Motor Replacement
The idle air control motor or idle speed control motor is designed to adjust the air flow into the intake manifold at engine idle. Engine idle speed is monitored by the PCM...
VIEW MORE