91 non turbo with a funky idle [Archive] - Toyota MR2 Message Board

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Hello all I was just given a 91 non turbo manual transmission. It has a few issues but all in all good condition for free. The car has sat for about a year but I just jump started it got in and drove away. The problem is after it warms up (or has just been idling for a few minutes) the idle begins to fluctuate between about 1000 rpm and 1900 rpm. It is a constant up and down. It only does this after it has been idling for a few minutes. I am also wondering if there are any funky mr2