Power loss

[Qxx4]

I have a 2003 qx4 and on 60kmh i floor it it stays on second gear but u dont feel like it pulling properly although launching from stop it goes properly does it have to do anything with the swirl valve control not working ?

[AlanAZ]

I would consider replacing the fuel filter if it hasn't been replaced in a while and/or the quality of the fuel is questionable in your location.

"Officially, Nissan recommends changing the fuel filter when the Pathfinder doesn't respond well when you press the gas pedal. As a preventative measure, however, you should change your fuel filter on a regular basis. I recommend changing it every two years, as a preventative measure.

A clogged fuel filter can cause poor acceleration, rob power, and reduce fuel economy. Using a clogged fuel filter also puts a strain on the fuel pump and can cause it to fail prematurely."

how-to-change-the-fuel-filter-r50-t459800.html

[Qxx4]

Well i live in dubai and here the fuel comes 95 and 98 octane only and usually i fill with 95 but i am not sure if the swirl valves are opening and their is no check engine light how can i check that and the fuel filter i will change that tommorw it has been 2.5 years i havent changed it