Question about 2003 Nissan Sentra

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2003 nissan sentra gxe no power after 40mph and rpms go high

My Nissan sentra  wont speed up after about 40 to 50 miles an hour. my rpms go high and then back down  won't go up hills. what could be the problem  some told me it could be a fuel filter but i can't find it. also some said mabey a cadilitic converter but i had a new put in three years ago? HELP

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  • jjrivas Oct 24, 2008

    well it is an automatic trans. I had the catalytic converter changed by the dealer it was a recall of some sort.  Thanks I try some of the suggestions and let you know.
    Thanks Again 


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It sounds like your catalytic converter could be plugged or the pipes that goes from the exhaust to the converters. You said that you replaced them 3 years ago but what kind did you replaced it with, OEM or universal? How about your transmission does all the gears work?
I hope this could give you some ideas to work on.
Good luck.

Posted on Oct 24, 2008

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If this car has an automatic transmission, i would verify the fluid is full and clean. if manual trans, clutch? the fuel filter in this car may be in the fuel tank and is not serviceable. otherwise could be located near air filter housing or firewall. is the service engine lite on?? if so, that should indicate a direction to go.

Posted on Oct 24, 2008

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