Oil pressure is fine. It's supposed to peg at 3 bars when you accellerate and will go down to 1.5 when you're sitting at idle. The only probelm is if it doesn't go up to 3 when you accellerate. Oil pressure is a direct feed from the engine up the cable to the switch in the dash so it shouldnt be fluctuating at all while driving.

Voltage regulator is on the back of the alternator. Easy to replace. There's just two or three screws if I remember correctly.

- Peter.

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2021 Chevrolet Spark
Formerly...
2000 GMC Sonoma
1981 240D 4spd stick. 347000 miles. Deceased Feb 14 2021
2002 Kia Rio. Worst crap on four wheels
1981 240D 4spd stick. 389000 miles.
1984 123 200
1979 116 280S
1972 Cadillac Sedan DeVille
1971 108 280S