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On my Chevy truck it idles high when its low on antifreeze but if its not that more than likely its usually a vacuum line loose or cracked. good luck.
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1998 Mazda 626 engine light on and idles too high?
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Why the engine's idle goes high and low?
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FORDS ARE A poc
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Why does my 86 Chevy caprice shift too early the transmission fluid is fine and it idles too high in the mornings?
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