[V8] Causes of Bad MPG?

[Jason Wilkerson]

My new v8q is getting really bad MPG - I replaced the o2 and that worked
on my last v8 - didn't here.  I'm thinking bad wire to the ECU? Bad
ground? Runs like a champ - just about 5 MPG less than my former v8q? 
Same years so the running gear is the same.  ANY Ideas will be
entertained.

       Thanks,
            Jason

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