2001 Nissan Pathfinder hesitation

[wileythenord]

Hello all! I've tried to search the forum but I don't feel like i've found the remedy to my problem.

My pathfinder drives fine in the morning when its cold, but when the engine warms up it hesistates so hard while you are driving that you can't stand it. It was only doing it between 2000 and 2500 rpms but not it seems to do it any time. I've changed the MAF sensor, changed spark plugs any further suggestions?

[4xq]

So you are saying when you get on the gas pedal, it falls on its face for a brief moment before it takes off? If that is the case, I guess I would think throttle position sensor. It is supposed to tell the ECU what the gas pedal is doing so it can compensate when you hit the gas.

There is some data in the service manual in the EC section about testing the TPS. The FSM is here:
http://www.nicoclub.com/FSM/Pathfinder/