I'm fixing up an old 2002 Subaru Impreza (2.5L), and the only problem left is that on heavy acceleration, such as up hills, the vehicle chugs and stutters a lot, even comes close to the engine dying. Once the accelerator eases off, or after the car is started up again if it dies, things are generally fine again until heavy acceleration occurs once more.
Could this be the fuel injectors? I have isolated and confirmed that it is none of the following:
- Fuel pump
- Fuel filter
- Ignition coil
- O2 sensor
Besides the fuel injectors, the only other thing I can think of is the MAF sensor, but I don't have the means to test this just yet. I'll do the injectors first (unless I'm way off base) and go from there. My next question is -- where are the injectors on this engine?! I can't even find the fuel rail: