Dear Ferraristi, I have an odd buzzing fuel pump problem. I have had this problem come on and off very rarely for the last couple of years....did it yesterday. I had buzzing pumps about 2 years ago and replaced the original pumps (since 91) with OEM Bosch units. Yesterday, they both started buzzing and the power dropped slightly. You could hear the exhaust note change and the idle was slightly lumpy. I pulled one pump relay at a time....bank dropped to six, but other pump still buzzing. I put back that relay....engine up to 12....pull the other relay, drop 6....other pump buzzing. I again put back the relay and back on 12. This morning, I start the car...all fine and all day....all fine. I find it strange that BOTH pumps would start buzzing and then today...none. The pumps are relatively new and the coincidence of both pumps buzzing then nothing make me think something else is at play here. Could it be something fuse box related? If power dropped to the pumps, the fuel flow would drop and the engine symptoms I experienced would be correct. But....if you drop power to the pumps....do they buzz? Any checks I can perform if it does this again....very rare occurrence. Shamile Freeze....Miami Vice !