intalled an aftermarket (kenwood) stereo with wiring harness adapter in my 96 fj80 and am getting engine (distributor) noise through the radio. I have had experience with this in older radios and vehicles but never with the newer set ups. also note that I have the exact same stereo in all 4 of my vehicles and only getting noise in the landcruiser. . i know I can add a noise supressor, but I am wondering if something else would help like an additional ground. any input? thanks guys.