Last week I got my Forester back after having the block rebuilt(133K).It runs great, plenty of power, etc,.However, I still notice as before, a little shake in the front end as I'm sitting at a stop. No dash lights come on, and the tach is steady. Last time I looked at the intake (Plastic box in back of it) it was sticky with a gum like residue.
Recently I replaced : Fuel filter (ran a cleaner through the tank), wires, coil,
and the much talked about front O2 sensor.
My question is this, which one of these listed would likely help the most:
Replace- the fuel injectors
the sensors to the intake manifold
Spray the intake (internal) with Seafoam.
Thanks in advance for any pointers!