i have a 02 skyline it had couple sensors changed after the timing chaing went so i have to change that but wen i try to start it p0340 code and the knock sensor showed up everytme i would try to reset the ecu it wout rev to 3000 2000 and the idle drops and stall i change coils and throttle . some please help

 

Are you sure the cams were properly aligned when the new chain was installed? If so then just replace the bank1 cam position sensor and see if the P0340 code goes away.

 

If you replace the cam sensor make sure it's an authentic Nissan piece. Our cars often don't play well with aftermarket ones.

 

i aint change the timing yet . after i had them couple sensors change only them two showed up but i change the fuel pump . but it still starts , idle rough and sometime if i catch it right it would idle up but if i let go it'll cut off .