Question about 2001 Ford Focus

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2003 ford focus shakes bad when cold. Exhaust smells like sulpher.

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  • Anonymous Mar 26, 2014

    smell from exhaust

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The shaking can be dependent on the engine size and configuration. The sulpher smell is from the catalytic converter starting to work as it is supposed to. Your problem could be as simple as a cold start sensor not working correctly. Your vehicle may or may not have one, but it should have something like it to tell the ECM (engine control module) how to run the engine when it is cold. Newer vehicles also use a sensor in the air-cleaner to measure the temp of the air going into the engine and then adjusts the engines fuel, timimg and other functions to make it run correctly. Your best bet would be to have a shop put it on a diagnostic machine and check the engine systems operations. Most all newer vehicles are computerized for better engine and emission operations, so it requires a machine to check them out. Good Luck, RAC

Posted on Apr 19, 2009

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