Anybody have any problems with their smog pump? Any down and dirty trouble shooting? Mine is just starting to make some noise. Belts are fine, hoses are fine, no other indications. A bit of rough idle and a little sluggish acceleration but I am due for new plugs, TB cleaning and fuel system cleaning. Just wanting to find out if there is anything I can do to prolong it. New one is about $400 (IIRC), rebuilt?(MAF? $200-300), used about $75-100. Any insight above and beyond the FSM is appreciated. TIA