I have a 1990 LX 5.0 and I'm throwing a code 33. Tonight I took off the EGR valve and cleaned it. When I blow into the vac connection on the side I can see the orange piece go up and down. When I connected the vavle and took off the white vac line I can feel the vac from that line and when I put it back on the EGR valve that orange foam gets sucked up alittle. My idle did not changed when I removed this white vac line. How do I know if the Valve is bad or the sensor. What does this all mean. I;m also throwing codes 94 and 44