This may have been asked before but I can’t find anything previously posted about it so if it has I apologise, my question is related to Citizens band radio, and I’ve just fitted a new one into my disco 2003 td5, it is SS6900 I’m not new to cb just in this car, aerial base is bolted through the rear wheel hanger and the coax is run through the door then up to the roof along the passenger side to the front above the passenger sun visor which I have removed and bolted the radio in that place so all controls and face points at the driver, power line goes down the windscreen pillar back and along the front of the glove box and I’ve soldered a fag lighter plug onto it and pick up the power from the faglighter port just in front of the H/Low gear stick, but when I start the engine I am getting engine interference of around 5lb on the radio meter the interference will drop if I lift my foot off the accelerator and rise again when I put my foot down, however it will also rise once static with engine running so it’s not just linked to driving along, I have tried connecting the power from the radio directly to the battery but no difference at all, can anyone throw any light on this problem, earth straps are ok.