01 Pathfinder idling and misfire problems...HELP!

[catchin_zzz]

01 Pathfinder 3.5L V6 Manual TransmissionMilage 87,000 miles

Having some major problems with my truck.Initially I had code P0153. Before I had time to fix the P0153 (O2 Sensor), another code showed up, P0505(Idling). Along with the P0505 came problems with acceleration and idling. I would stall when starting up the car cold and the car would not go over 3500 - 4000 RPM. It would go up and then back down and then up and down repeatedly if I kept on the gas. The code P0300 shows up (engine mis-fire).

I took it to the dealer who advised that I replace the ignition coils and spark plugs. I did this and the idling and RPM problem is still there. As far as I can tell. the coil replacement did nothing to solve it. The codes were cleared by the dealer and have not returned.

HELP!!!

[SayNoToPistons]

MAF?

[catchin_zzz]

GOOD CALL!! Went to another dealership and he said the same thing.

Funny thing is that I drove my truck this afternoon and it seemed to be driving fine. I was driving cautiously, trying not to take it over 3000 rpm. I was in stop and go traffic and decided to drop the truck in neutral and just rev the engine to see if the problem was still there and it wasn't. I took it to 7000 rpm with no problem at all. Weird! The other weird thing is that I got a P0171 code now! Fuel System Lean? That's got me confused even more! I'm guessing that it's caused by the MAF sensor.

Anyways, I bought a reconditioned MAF sensor and will do the install myself on Thursday. I'll clear the codes and see what happens. I'll let you all know how it turns out!