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2001 FORD ESCORT 57000 MILES - WHEN STOPPED AT STOPLIGHT (WARM ENGINE), ENGINE LOPES ... +/- FEW RPMS FROM NORMAL IDLE...
IS THIS IN IGNITION SYSTEM ie PLUGS AND WIRES, OR IN EMMISSION SYSTEM - i DO HAVE A BAD OXYGEN SENSOR!

Optional Information:
2001 Ford FOCUS 2.0SPI

Already Tried:
DID VISIBLE CHECK OF PLUG WIRES AND CONNECTIONS TO PLUGS.

Customer (name blocked for privacy)

Status: Closed Value: $10

One condition that a bad o2 sensor causes is erroneous idle. If you have a bad one I would start there first. IT could help with fuel economy also. The second thing is a vacuum leak may be present. I doubt it is ignition related. Most likely emissions. Hope this helps. Please click accept for me. ThanksImages available only to Customers.

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