Question about 2004 Nissan Sentra 1.8

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We replaced catalytic converter. Car will not go over 15 miles per hour what trouble shooting can you give us

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  • Deb Firkel
    Deb Firkel Apr 17, 2015

    Car has two catalytic converters the back one was clogged up too. Thanks for all the help

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It's possible if your cat was clogged,it caused back pressure and blew the head gasket,could be between 2 cylinders,you can pressure check the cylinders.Won't get hot or leak if gasket is blown between cylinders.This happened to me and I didn't put another cat on,a piece inside the cat came loose and blocked the pipe.The gasket was blown between cylinder 3 and 4 on my nissan truck.Check your spark plugs and see if any are real worn,then if they are then that's where to gasket is blown,my plugs were burnt a little,pressure backed up.

Posted on Apr 17, 2015

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Did you replace the cat under the car or the one in the exhaust manifold? Is the check engine light on or flashing. Does the car run the same with the new converter?

Posted on Apr 15, 2015

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