I had almost the same problem. I had left the car sitting for almost 6 months :shock: Then i got it regestered. Its only acted like that on turns (not every turn) the sheck light didnt come on. It reved its self when ideling. So I took it to mitsubishi (I Thought I was getting a full tune up for $290 but when there he told me $500) I got the 15k service and a coolent flush. The car worked fine after that and it worked fine today. I turns out that it was reving itself b/c the a$$hole mechanice @ a local shop left air in the coolant system.
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