I have a 99 Dodge Ram 1500 V6. It's been running rough the past few weeks, I'm suspecting the catalytic converter. How can I be sure?

It feels like it has a misfire but I replaced the plugs and wires about 2 months ago. I plan on checking out the plugs, wires, cap and rotor 1st but I'm pretty sure it's the converter as it runs nice and smooth when it's cool but runs rougher the hot it gets and the longer you run it. How can I rule out all other problems or the converter itself? I don't fancy replacing it for no reason.

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  • 4 years ago

    If you had mis fires or any other problem you would have a check engine light on. That's where you start is to fix the problems that caused the light to come on.

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