2000 Chevy Blazer catalytic converter

[quote:feb822081a="darrell123456"]Engine Performance problem
2000 Chevy Blazer 6 cyl Four Wheel Drive Automatic 120000 miles
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How can I test if the cat is pluged. Would like to know the upstrem and downsterm presure and how to check this. Don't know much about how to test this. My truck seems to have no get up and go, code reads multiple misfires, idles rough at times but nothing is consistant. Already checked the fuel pressure and replaced the fuel pump. Any suggestions?[/quote:feb822081a]

If your getting a code that indicates Multi Cylinder Misfire try changing the Spark Plugs. Also when was the last time you changed the Plugs? I would also change the Plug Wires if they have never been changed.

I don't think your cat has anything to do with the lack of get up and go. Since you are getting a code for missfire.

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