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#1
03-07-2004, 06:18 PM
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Poor milage and a miss at full throttle after head/intake gaskets job.
My 1997 5.7 suburban got 17-18 MPG before I had head gaskets and intake gaskets put on it. Now it gets 13 MPG around town or down the interstate. I have check 4 tanks and the milage has not improved. Is it possible that the garage did not get the distrubutor on correctly and it is causing a problem? It has plenty of power but has a miss under full throttle.
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#2
03-07-2004, 07:15 PM
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I'd take it back to the shop and have them recheck the timing,plug wire routing,and mack sure they didn't tear a plug wire.Try pulling you sub.in the garage,with the garage door cracked just a bit(fumes)turn out all the lights and see if you see any spark under the hood.hope this helps and hope you get the problem resolved.
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