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[bigfooto61985]

I drive a 2000 nissan maxima with 150,000 miles on it. I've had to change 3 ignition coils (those were the only ones not working) when i got a misfire code. After that it still ran pretty sluggish and hesitant however it has gotten to the point were its undealable now. If i try adn let it run from a cold start it will die on me in about 30 secounds or so. When accelerating i almost have to have the throttle in an exact position to get anything yetr if i push down on the throttle all the way when driving my RPM's don't change at all. It feels as if the car is already maxed out and it can't/won't go any faster speed wise or acceleration. When i let go it'll surge up briefly then try and die on me again. Often times i have the acceleration of a semi!! My SES light is one and the codes that are showing are P0135 and p0153 ( i belive those are it) saying bank 1 and 2 rear and front O2 sensor slow response? i can understand them not working but slow response. is the solution the same for a broken O2 sensor, that of buying and installing a new one? Every once in a while it'll throw in a cat monitor problem also. Looking around and researching tho im getting a lil confused. Seems theres multiple things that can cause this problem from the MAF sensor, to the TBS to the Catalytic converter, to the O2 sensors. I'd rather have a better idea of what to replace and focus on before i got around buying parts and spending any more time in the 100 degree weather under the hood of a car. I hope this wasn't overly detailed or confusing. ANY help is appreciated.

[gregz]

disconnect the catalytic covnverter and give it a short test drive. If the power is back you may have found your problem