1999 Ford Windstar realy big problem with fuel injector

You must depressurize the system, use a rag and on the fuel rail you will see a schreader valve, it looks like a bicycle valve stem, wrap the rag around it, then press the stem. Now locate the blots that hold the fuel rail down, and take them out, remove the connector and wiggle the rail off, some injectors will come out with the rail, others will stay on the manifold, get enough O rings to replace them all, use a small amount of motor oil on the rings, NO silicone grease! Reassemble the injectors on the rail and push back into place...