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1993 Mercury Cougar Question: when starting 5.0 1993 cougar xr7,engine light flashes 5 times,engine idle 1800

 

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COUGAR 1993 5.0, Picayune, MS, July 15, 2014, 13:59
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when starting 5.0 ,engine light flashes 5 times in about 7-8 seconds,idle at 1800 rpm,about 1 min,engine rpm drops to 750-800.1 code i recored said 121?

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