Alright. So I got a CB radio recently and installed it in my 86 4runner. Cobra 19 plus, 3' Firestik II and Firestik medium duty spring. Mounted through the space of the hood on the driver side. I have 9' of coax running under the cowel and through the grommet on the passenger side along with the wiring for my offroad lights and stereo amp.
I am yet to tune the antenna, but I am getting lots of engine interference. As the RPM's get higher so does the pitch coming through the CB. I can adjust my squelch to get rid of the interference but it will still pick up the high RPM's and the incorrect squelch makes it so that I can't talk or hear over the radio. Please anyone that can help let me know what I can do!

 

You can try running the power and ground directly to the battery, if that doesn't work you can buy a inline noise filter.

 

Roght now my power is through the cigarette lighter plug so I can try that. Do you know how much those filters run? I thought it might be the amp wire run with the coax but I'll look into those

 

It is from the ignition system

You can try new spark plug wires . The noise gets worse as the wires age and start to break down.

But you gonna end up adding a noise filter