On Wednesday, January 23, 2013 8:06:33 PM UTC-8, wrote:
> any chance you could get him to share his wiring mod?

We had a similar symptom with an '85 Golf 1.8L gas. After replacing the oil pressure switch to no avail I tried heavier weight oil. I was running 10W-30 and switched to 10W-40. The higher viscosity at high temps did the trick.. No more buzzing. I'd try more viscous oil before a wiring mod.