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firstly check that your airflow meter is working properly that's tends to give an uneven idle,next check your ISCV (idle speed control valve) that can cause problems too & by clean it out it is just a short term solution need to buy a new one later on.also check your leds to your spark plugs for cracks & residue build up.this is all process of elimination.

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Q: 2001 Ford Mondeo 1.8 LX has start up problems and erratic idling which leads to stalling?
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