1993 Mitsubishi Other

Engine Performance problem
1993 Other Mitsubishi Models 4 cyl Two Wheel Drive Manual 200000 miles

dear friends,

I have mitsubishi eterna 1993 4 cyl 2000 cc dohc, mpi.
whenever I started to turned on air conditioned, engine idle not stabil betwen 600 to 1000 rpm, but after a while the engine runing, engine idle stabil.
but sometimes engine idle back to unstabil.
if I turned off AC, engine idle in good condition.
thank u for ur response.

ps : I am sorry if my english not well, my name is arie, I'm from indonesia
May 4, 2010.

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