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2000 Ford Escort idle rough

Tiny
PERSINGER89
  • MEMBER
  • 2000 FORD ESCORT
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 121,000 MILES
When stopping and depressing the brake fully the car idles really rough. It gets worse when I turn on the headlights are on. If I put it in neutral it does better. The air conditioner clutch engaging also makes it idle the worst. What could be causing this?

I've replaced the throttle position sensor and I've had the alternator and battery checked. I've also replaced the air filter. The plug wires and plugs have all been changed. After replacing all the above it still continues to idle rough. Any suggestions?
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Sunday, March 21st, 2010 AT 5:51 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Let's do this clean out the idle air control valve and the EGR and PCV valves, test the MAF sensor, and look for vacuum leaks start at the vacuum hose to the power brake booster and booster itself if its leaking
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Monday, March 22nd, 2010 AT 6:08 AM

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