How can you tell what is causing your car to die every now and then and smell like exhaust fumes?

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Answer

Sounds like the catalatic converter is either pluging up or starting to fail. Either way if this is the problem it will either start having worse performance or just stop runing entirly.

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I had this same problem and it was a faulty fuel injector. Check to see if it is wet around any of your fuel injectors.

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I have a 1992 q45 I had the same problem i changed my back cats and it still did the same thing coul it be my front ones to

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I have a 1995 Mazda 626, I have a similar problem. It dies right at 15 seconds after I hit the gas and remain at 3500 RPM, and I can hardly get up a hill. I have already changed the fuel pump, the injectors were fine, the O2 sensors were fine, changed the air filter, no clogs in the fuel delivery system (yes changed the fuel filter too), changed the plugs and wires, changed the fuel regulator... the only thing left is the catalytic converter is plugged... it's as if my car has asthma, so I'm looking at the Throttle position sensor. Will keep you updated.

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First answer by Beth VanRavenswaay. Last edit by Frostye. Contributor trust: 35 [recommend contributor]. Question popularity: 96 [recommend question]

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Can exhaust leaks cause a car to die out?  How long do you have to smell wight out to die?