Question about 1997 Nissan Pathfinder

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97 Pathfinder It suges when you are driving down the road, changed the fuel filter, tune up, checked the fuel pressure and flow, changed the gas and put a injector cleaner in, it gets worse as you drive it

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  • steven hegarty Mar 26, 2011

    Fuel pressure is 30lb at idle and 38lb at higher rpm, It ides fine

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I would pull the codes to see what the computer says is going on but with limited information i would guess throttle position sensor.

Posted on Mar 26, 2011

  • steven hegarty Mar 26, 2011

    no code

  • superponty Mar 26, 2011

    Ok now you need to see if you have the proper fuel pressure. Also if it runs poorly while idoling unplug the mass air flow sensor and see if it changes. You can also put your hand by the exhaust pipe and see if it seems restricted. If the catalytic convertor is starting to clog up it will restrict exhaust movement from the engine. Which makes it harder for the engine to intake the proper amount of fuel and air. As it gets hotter it will restrict more and more making the engine run progressively worse as it gets hotter.

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