If the engine misses or sorges will it throw a code on 2008 Pontiac Grand Prix

My car had 117.000 miles on it,so i replaced the plugs and plug wires now car jumping in rpms(200-300 rpms) took to a shop says transmission is the problem,did not start untill did the tune up

by in Arnaudville, LA on February 12, 2013
2 answers 1 comment
ANSWER by on February 12, 2013
GO TO A GOOD MECH THAT CAN SCAN MISFIRE CODES
COMMENT by on February 12, 2013
The engine light is not on indicating a missfire
ANSWER by on February 12, 2013
Agree with #1