2004 Mercury Sable Problem when braking

2004 MERCURY SABLE
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SHIRLEY ZIELINSKI
  • MEMBER
  • 1 POST
Transmission problem
2004 Mercury Sable 6 cyl Two Wheel Drive Automatic

While at a complete stop, the car feels like it's shifting gear and lurches. It does it regardless if the car is in reverse, neutral or drive.
Oct 2, 2008 at 10:35 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
You may have a vacuum leak, get a can of spray gumout, spray the vac lines and maniflod area, when the idle changes, youve found the leak! You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs! If that doesnt do it, you may need a new idle air control valve, it's bolted to the throttlebody. Is the check engine light on?
Oct 2, 2008 at 10:54 AM
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