Engine hesitation

I just got my new ka24de in my 240 tonight. Well it runs but i got some hesitation when i press on the gas but when i let go of the gas it starts to go and when i press it again it start to hesitate again. Does anyone know what the problem is?

Timing is off, coil is going bad, plug wires are faulty, plugs are bad, plugs are fouled, vacuum leak, fuel filter is dirty, fuel pump is going out, bad ground, o2 sensor is faulty, PCV valve is faulty, distributor cap and/or rotor is faulty, bad gas, carbon deposits, inproperly gapped spark plugs, dirty MAFS, faulty MAFS, EGR malfuntion, the list goes on. Be more specific and maybe we could help you a little better.

My first guess from what you said would be either plugs or MAFS being dirty.

fuel pump/injectors possibly..

I think it could possibly alot of the fuel componets because this car has been sitting with old gas and fuel pump for awhile. I got new ignition system so i'll put them on tomorrow after i do the tune up. I'll keep u guys posted and here in a coupe of days there will be another 240 on the streets.

hahah nissanfanatic.. i think we replied at the exact same time