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350matt
350matt, Engineer
Category: Mazda
Satisfied Customers: 21630
Experience:  Mechanical Engineer BEng Hons22 years experience
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Mazda Neo Sports: I have done 6000 km in my mazda 2014 bought

Customer Question

I have done 6000 km in my mazda 2014 bought new. It has just started to smell like burning plastic I have checked no bags caught on exhaust
Submitted: 1 year ago.
Category: Mazda
Expert:  350matt replied 1 year ago.
Hello Also check under the bonnet for anything that is rubbing on the hot exhaust manifold, wiring can come loose from its mounts or vacuum tubes touching anywhereif this is OK then check for exhaust leaks before the O2 sensor as if this has been experiencing an exhaust leak then it will have been running very rich as the sensor will see the extra air pulled in as fresh / lean fuelling and be adding fuel to compensate. this can lead to catalyst failure as the extra fuel can re-light inside and melt the catalyst The best way to find an exhaust leak is to run the engine from cold and feel around the exhaust joints with your bare hands - you'll have about 30 seconds before it all gets too hot and you should feel any escaping gas blowing over your fingers
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Expert:  350matt replied 1 year ago.
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