Running a bit rough. Doesn't stall, but when stepping on the gas it will sputter on 2001 Mazda B3000

Check engine light comes on. Got that checked. Code meant a problem with #3 cylinder. Replaced that spark plug and got a new set of wires put in. Yet the sputtering remains. Not sure what to try next. Even check the air in-flow and it looks clean. What do you think?

by in Stillwater, MN on December 08, 2012
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2 answers 1 comment
ANSWER by , December 09, 2012
What did the spark plug that you replaced look like? That info would help point a direction , if indeed it was a problem (presume DTC P0303).
COMMENT by , December 11, 2012
The spark plug looked used\ slightly blacken.
ANSWER by , December 09, 2012
possible injector?