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Question
i HAVE FORD EXPLORER 2007 XLT 4.0 MY CAR HAVE BLACK SMOKE AND THE ENGINE NOT STABLE WHEN I MADE OBD TEST ITS GIVE CODS P0191 & P0452 AND FROM FRIZZ FRAME SHOW short trim bank 1 = - 28.9% and short trim bank 2 = -28.9% when i tack my car to inspector he side the PCM NEED TO REPLACE I DONT BELIEVE THAT so i need help
By Abdulgawad 10 October 2016
Answer:

Not only P.C.M your engine also needs to be overhauled first

Answer by Venkat 10 October 2016
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