Metalaid ha scritto:

well also my Eclipse 1G has the same trouble, but it's also because it's
LPG fueled. when I turn back to gasoline, the idle is definitely better
(but not 100% right as well).

Simpleton told that a significant improvement is achieved by cleaning
regularly the air intake from carbon deposits: it's true. he used a
spray cleaner to be injected between air filter and throttle, in order
to clean throttle, valves and engine head. you can do it yourself.
moreover, sometimes a worn throttle can allow air leaking from its
gasket or from its bearing. this simple check may be carried out by your
workshop in a while.

since 2.0 mitsubishi engine has the ignition coil very close to the
engine block, an overheating can damage the case and cause loss of
efficiency and poor insulation: check it out and, if necessary, improve
insulation with a self-adhesive sealing wrap (it is on sale at
specialized retailers).

hope to be helpful.

andrea

If the vehicle was recently tuned and the air filter is in good shape, then
thoroughly clean the air intake throttle body with throttle body cleaner, an
old toothbrush, and a soft rag.

A bottle of good fuel injector cleaner (I like Dupont Techron) in the tank
wouldn't hurt either in my opinion.

Good luck.

 Bob