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
4 answers 1 comment
ANSWER by on June 06, 2013
check to see if your converter is plugged
COMMENT by on June 06, 2013
did and its not
ANSWER by on June 06, 2013
poss running very lean
ANSWER by on 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 on 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.