1995 Chrysler LHS

Heater problem
1995 Chrysler LHS 6 cyl Two Wheel Drive Automatic 181000 miles

Dear Technician;
Engine runs a little rough and the engine light comes on indicating " Oxygen Sensors". I have replaced the Oxygen Sensors, run cleaner through the lines, run 89 octane fuel and have put a can of " Sea Foam" in the fuel tank. All Cylinders have good compression. However -- odd cylinders, 1, 3, 5, (left bank) are producing too much carbon and the carbon is fouling the spark plugs. (I assume too much fuel on that side.) I have checked everything that I know to check and have about given up. Can you suggest anything. If someone comes up with the answer I will make a donation. I have spent lots of money to get this far.
Thank you for your time.
Howard Smith
September 21, 2010.

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