I have an 1997 escort and its misfiring checked spark plugs 3 of them are fine the other one has oil in the well of it whats wrong with it.

Why are you looking for an oil solenoid. A misfire is only caused by two things

A fuel injection issue
or
An ignition/firing/spark issue

It appears to be a well documented issue on the Avalon. Take a look at the videos.

Also clean the Throttle body and MAF

https://www.google.com/search?q=1997+toyota+avalon+3.0+v6.+The+scanner+shows+I+have+a+cylinder+3+misfire

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Check the timing belt, open the oil cap and see if valves move.
Check if there is a misfire.
Open the fuel line and see if got pressure.
Last but no least check the inyectors.

head gasket blown or warped heador cracked head on engine

Check your timing chain.

check the spark plug, the spark plug wire and the coil. those are the 3 things that can cause an ignition misfire.also check your oil and anti-freeze levels, make sure they are not mixing together.

if you have oil leaking that severe, chances are that one of your spark plug holes have oil in them causing your misfire..in that case it would sound that you need to replace your valve cover gasket
to check pull one by one you ignition wire up from valve cover and check for oil in hole and on boot

hope this helps

Jay

Switch spark plugs, ignition coils and fuel injectors from cyl 1 to 3.
See if misfire goes to cyl. 3. If that happens replace the damaged part.
If is still on cyl. 1 check the compression of the cyl. 1.
If that's ok see if the air mass sensor is working fine.
Also check if there is oil in the plug of the lambda sensor.

If it wasn't misfiring before. Make sure you have the proper gap on the spark plugs. Make sure you have the wires connected in the correct order. If you have the old wires, you may want to end up trying those one at a time to make sure you don't have a defect wire either.
Thank you,
Lee

fuel pump....if its got a spark, and the valves are timed... check the obvious...air and fuel.

sound like your vavle cover gasket are bad