My car RPM goes from o to 3000 rpms without me touching the gas then its starts on 1995 Honda Accord

to over heat so much that I cant drive it . What causes this type of problemk I already replaced the thermostat and I dont have any vislble leaks . Thanks for your help

by in Columbus, OH on November 17, 2012
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2 answers
ANSWER by , November 17, 2012
possibly head gasket
ANSWER by , November 17, 2012
Find the cause of the fast idle first. Check for vacuum leaks and throttle cable binding/off track.