On another forum an owner of a 328 is experiencing low oil pressure at idle with the A/C on. His RPMs drop to about 850 and his oil gauge reads almost zero. As the engine picks up revs the oil pressure returns. Here are my questions:
1. What should his idle be?
2. Is 850 too low or is this normally high enough?
3. Most cars have an “A/C idle switch” that ads more fuel to bring RPMs up when the A/C is turned on. Does the 328 (or 308- injection series) have such a switch?
4. If it does, where is it and how do you adjust it?