My 1999 rodeo check engine light is on sometime it flash's an it idle rough. on 1999 Isuzu Rodeo

I just replace the engine a few month's ago an it was runing fine until a yesterday now it's runing like it has a leak somewere an it's runimg rough in all gears.

by in Jacksonville, FL on September 11, 2013
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2 answers 1 comment
ANSWER by , September 12, 2013
have it scan tested for codes
COMMENT by , September 12, 2013
I had my rodeo scan tested an it was the number three coil pack misfire replaced the coil pack now it run great the scan code was po303cylinder no three misfire detected....
ANSWER by , September 12, 2013
scan codes and post so we can adv