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

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

by in Jackson, MI on June 05, 2013
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4 answers 1 comment
ANSWER by , June 06, 2013
check to see if your converter is plugged
COMMENT by , June 06, 2013
did and its not
ANSWER by , June 06, 2013
poss running very lean
ANSWER by , June 06, 2013
Recheck ignition timing and plug wire placement to be sure #1 is where it is supposed to be! Running rough, lack of power?
ANSWER by , June 06, 2013
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.