alan taylor

Hi, i have an Audi 80 2.3 1993 cabriolet, the oil pressure light comes on intermittently, i have replaced both oil pressure switches, flushed the engine through changed filter and oil but the oil light still comes on for a few seconds and then goes off the most likely time this happens is after pulling away from a roundabout the light sometimes comes on, the engine is running perfectly, the oil pressure guage operates fine, any ideas thanks Alan