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Why does my 2000 Ford Courier billow black smoke when it starts?

Asked by Mike

My 2000 Ford Courier when started sounds like a choke is on and billows black smoke from exhaust. It is an injected motor, could an ECU sensor be faulty. How do you test the sensors?

Answered by CarsGuide

17 Sep 2020 David Morley

The best way to test the operation of a fuel-injected car’s sensors is to have the vehicle scanned at a workshop with the necessary computer gear. The error codes that are revealed will tell you exactly what’s going on and save you the time and money of replacing bits and pieces until you find the actual culprit.

As for your symptoms, black smoke from the exhaust usually indicates a too-rich air:fuel mixture which could be the result of worn injectors, incorrect fuel pressure or a faulty temperature sensor. There are other causes, but those are the ones I’d investigate first. After a scan, of course.

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