Sue,
This is not you you want to hear, but when I burned a valve in my winnie, those where the two codes that I was getting. To rich & too lean. I found my issue with a compression test. 2 cylinders were really low...like 30psi.
I just had an inexpensive screw in compression tester. If you have a friend that is even a little mechanically inclined, its not hard to take out a spark plug, screw in the compression tester and crank the engine. Check the reading on the tester. Unscrew it, replace the spark plug and move to the next plug and repeat the process for all 6. This may not be the "proper" way to get the "true" reading, but you want consistency. For example if the 1st three cylinders come in close to each other, say 110, 120, 115....then the 4th one comes in at 30, then you have a problem. If they are all similar than you have some other issue. Make sense??
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JohnJab01
