Engine rpm's goes up and down ,and the overdrive lamp flashes prereodicly. car won't continue to drive when this happens then rpm's goes down car goes agan.
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1995 Ford Probe
Question: Engine idle rpms goes up and down
probe22 May 05, 2009, 11:03Enthusiast
sounds like your idle air control valve is bad,
Answer #2ProbeSeattle July 12, 2012, 02:18Rookie
same problem. Make real sure your radiator fluid is totally full. I found that the intake manifold gasget had got so hot it curled up at the top corner tip. allowing air to get in unregulated. also check to see if your air intake tubing has NO leaks or cracks between your mass airflow unit and throttle body.