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What causes engine to rev up and down on a 1995 ford windstar when car is in drive or reverse but not in park or neutral?
Wiki User
∙ 18y ago
sounds like a vacuum leak,, check vacuum lines from both valve covers for leaks or dry rot I just had this problem. My fix was simple. Remove the MAF sensor, get some electrical contact cleaner and clean the two wires/sensors. DO NOT TOUCH the wires or they may break. You may also have to purchase a anti-tamper star/hex set from advance auto parts (aprox $10) to remove the MAF sensor. This really works like a champ. Also, replacing the Idle Control Valve would not hurt as junk builds up in it.
Wiki User
∙ 18y ago
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