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Q: muffler gets white hot and the motor makes apopping noice on 1998 Chevrolet Blazer

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i just put a new motor in my 98 blazer and now it is making a popping noice and the muffler and cadalice converter get white hot i changed the wires plugs and cap
(4) Answers
(1) Comments
Recheck ignition timing and plug wire placement to be sure #1 is where it is supposed to be! Running rough, lack of power?
Was the new motor a 'long block' , 'short block' or complete used motor from a salvage yard? Popping through intake? Valve or timing(or both) issue.
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