1986 Chevy Beretta over fueling

1986 CHEVROLET BERETTA
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TRENT155
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Engine Performance problem
1986 Chevy Beretta 4 cyl Two Wheel Drive Manual

i'm geting no error codes on the diagnostic.my brand new spark plugs are carboned up i have put in a new map sensor.and the coil pakes wher replaced not long ago. but the engin is still runing rich. what do i need to look at next to solve the prob.
Nov 3, 2008 at 3:01 PM
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DOCFIXIT
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O2 sensor and temp sender for ECM
Nov 6, 2008 at 9:48 AM