check engine light came on,code reader says misfire on #3 cylinder on 2002 Dodge Ram 1500

I had my plugs changed about two months ago because I noticed a slight miss.NOW MY CHECK ENGINE LIGHT IS ON AND CODE READER SAYS MISFIRE ON #3 CYLINDER STILL HAS SLIGHT MISS ESPECIALLY WHEN YOU FIRST START THE ENGINE.ANY IDEAS WHAT COULD BE THE PROBLEM??

by in West Monroe, LA on April 19, 2011
1 answer 4 comments
ANSWER by , April 19, 2011
i would look at the wires, cap and rotor. all these are bascis of a complete tune up. this is a good start before talking about injectors or something else. thanks for using repairpal Roy
COMMENT by , April 25, 2011
2002 dodge does not have distributor cap,rotor, or plug wires. I have changed plugs and replaced the coil pack on #3 cylinder to no avail.
COMMENT by , April 25, 2011
which motor?? 3.7, 4.7 or 5.2 Roy
COMMENT by , April 26, 2011
the 4.7 litre engine. I have 90,000 miles on the motor but it does'nt use any oil or run hot also there are no ticks or knocks in engine.
COMMENT by , April 26, 2011
the codes that are displayed are a best guess estimate of the missfire. it may be another coil that is missfiring.. i suggest a shop to test all coils for failure to be sure of the problem. Roy