Wine in AM radio after tune up??
After changing the plugs and boots along with ig. coil springs I have a wine, that gets faster and slower with engine speed, on AM radio channels. I didn't have the wine before. I finally fixed my chk. eng. lite problem with an egr valve, solonoid, and plugs and wires in my '01 Grand Marquis. The car runs great but the wine really bothers me. On of the boots had two slits in the rubber but I changed them all. I cleaned corosion off some of the coil contacts and used dialetctric grease on the contacts and plugs.Is there any way to check where the wine is coming from? I used OEM plugs but the boots and springs were from Carquest.