Start to drive it bucks

Tiny
MARCOUSG
  • MEMBER
  • 1993 MITSUBISHI ECLIPSE
When I start my car in the morning and start to drive it bucks, but when I sit there and let it warm up it its okay it takes sometime.
Friday, December 2nd, 2011 AT 8:23 PM

1 Reply

Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
The Idle Air Control Valve is probably in need of cleaning or replacement. It is on the intake manifold near the throttle body. It will have a large vacuum tube or an electrical connector that gives it a signal that keeps the idle steady. If it has a vacuum line, check it for leaks and if it has an electrical connector, wiggle it around when the car is running.

If you take it off to clean it always spray the ports from the outside in towards the intake direction to avoid creating a clog.
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Saturday, December 3rd, 2011 AT 12:03 AM

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