Hello all! I just picked up an R31 Skyline Wagon from my buddy. It's a great car, super clean, but it's got some problems. It does have the RB20ET engine, not the RB30. It takes a while to start up, sputters but doesnt want to fire. Eventually it does fire up and idles perfectly fine(around 700-800rpm). Around 5-10 min of idling, it will begin to sputter again and die down unless you really lightly tap the gas to keep her alive. When driving, it doesnt like a lot of fuel and will start sputtering and dying if you give it more than 1/8 throttle, almost nothing. I was thinking it would either be the MAF or Fuel Pump. It has a new fuel filter. What do you guys think it could be? Also, is the MAF interchangeable from the RB20DET because I see a ton of the MAF units for R32 and R33 Skylines but none for the R31.