ok, i have an important trip planned for tommorow and now i'm hearing a knocking noise. i believe it's from the smog pump. i tightened the belt to it as it appeared slightly loose and it got much worse. engine idle actually surges a little when it's happening. i put a long screw driver against the smog pump and it definately feels like it's coming from there. question...is it a bad idea to drive it on this trip about 120 miles? do they go out slowly? does something really bad happen when they do? also should i replace it or could it be a fixable problem? i also noticed some reddish oily residue pasted all over the front of the power stearing pump and pulley. what a bummer! any help would be greatly appreciated.