2005 mercury 3.0 200hp loading up with fuel

hybridbuster

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Mar 10, 2008
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This engine is loading up on fuel on all six cylinders. Replaced fuel pump kit, high pressure box has been completely cleaned, new engine wiring harness that goes to ECM, all coils have been checked, injectors sent off and cleaned. The ECM will not code anything. The Mercury Rep has worked on it and can't find anything wrong. Could it be the ECM gone bad. How can you tell if it has. Parts changing is getting expensive. To much money for the ECM, just to see if that is the problem. Need help bad.
 
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