Changed spark plugs, pcv valve, air cleaner filter and cleaned the throttle body .So I just did changed the plugs on my Charger R/T last week and found one plug loose. Well I'm not sure what the deal is but the rear plug on the passenger side on the FX was loose too. The FX has 138k on it and this was the first plug change. One spark plug well on each side had lots of oil from the valve cover seals. The old plugs had some serious wear the electrode tips were completely gone but all looked the same.
The FX had developed a small engine noise after my round trip to Portland about 6 months ago, aperantly it was the loose plug because the noise is gone now.
Got everything buttoned up but now I have a "Service Engine Soon" lit up. I have tried the pedal dance several times, I disconnected the negative battery terminal for 30 minutes and went for a drive. I still have the light? Any thoughts on what to try next?
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