does knock sensor will make the engine run rough hesitates to take off
Yes, when the knock sensor fail there is an hesitation when coming from a stop. Also make sure you check the spark plugs.
If you don't want to remove the intake to replaced the knock sensor, there is a tutorial to relocate the sensor. Tutorial here; http://x.nissanhelp.com/forums/diy-projects/24251-3-3l-knock-sensor-relocation.html
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