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1) Yes. By disconnecting the EGR in/out lines + the vac line to the diaphragm, the EGR valve can be removed.
2) Spray into the port/tube going TO the intake manifold (will have vacuum on it at idle)
3) By doing #2, you are cleaning the full length of this line, including what is internal to the intake manifold.
*Like I said- I have not done this to a windstar (yet), however all EGR systems have the same basic components. You may want to invest in a ford service manual for specifics.
G/luck
Joel
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