Low Oil Pressure Warning Light

[Kevin.FILLIP@domain.elided]

     Fellow Digesters;
     
     Changed the oil in my '91 Spider this weekend in preparation for my 
     anual vehicle inspection/emmissions here in Texas. While I was in 
     there, I decided to replace the oil pressure sending unit, because the 
     one that was in there had seemed to read consistently low. After I was 
     done and fired her up, the low oil pressure warning light on the dash 
     came on and stayed on. I removed the new sensor, clean everything and 
     put it back on again, but still the warning light stayed on. I even 
     put the old sensor back on but the warning light won't go out. The oil 
     pressure guage is reading at the first bar after 0. Car runs like a 
     champ and doesn't miss a beat. I even drove the car down to the 
     inspection station and passed with flying colors. What gives ? Oil 
     level is perfect in the sump according to the dipstick. I checked the 
     shop manual and it mentions the possibility of an oil pressure 
     regulating valve becoming clogged (as a potential source of low oil 
     pressure) but of course, doesn't show you where this gizmo is located 
     on the car. Could the oil pump be on the way out ? Car only has 45K 
     miles and had the head redone/seals replaced at 42K. I'd appreciate 
     any thoughts. I also seem to recall someone posting the same problem a 
     couple of months ago.
     
     Kevin Fillip
     Dallas, TX
     
     '91 164
     '91 Spider Veloce
     '91 Spider

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