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Fighting Noise In A 2018 Honda CR-V

This forum is dedicated to helping people with questions about installing radio equipment in vehicles. This can include antenna installs, electrical wiring questions/problems, and mounting systems. Pictures of installs are welcome.

Note: Discussions regarding lighting, sirens, and other equipment now has its own forum in the 'off-topic' section below.

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Fighting Noise In A 2018 Honda CR-V

Postby nickwilson159 » Tue Aug 07, 2018 10:58 am

Long time lurker, first time poster. I've usually been able to find the answer to my question by searching through forum threads, but I'm stumped this time. This is a copy of a post on RadioReference, but I'm posting it here since the advice I've read on these forums seems far more reliable.

The noise in question:

I had the radio professionally installed by NYCOMCO, including an NMO mounted Comtelco 1/4 wave (drilled a hole in the roof) and Comtelco Micro Loss 900 coax. Removing the antenna eliminated the noise, but just to be safe, I ran a second ground to the seat bolt - no changes. I then installed 4 ground straps along the exhaust, tailgate-to-body, hood-to-body, engine block-to-body, and radio body to seat bolt just to be safe - again, no changes.

The next course of action were ferrite beads, which were applied to the coax and various wires around the engine bay. The beads on the leads to the coil packs were the ONLY thing that made a dent in the noise of everything I've tried. Unfortunately, as the leads to the coil packs were so short, they aren't exactly mounted as they should be - and most of the wiring is still encased in plastic.


Any ideas on where to proceed from here? Some Googling made mention to using 3M copper tape to wrap around the offending parts, but I'm not sure if that'd actually work or not.

Thanks in advance...

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Re: Fighting Noise In A 2018 Honda CR-V

Postby MotoFAN » Sun Aug 12, 2018 3:46 am

Do you have inline DC power filter installed? If no, it might help. If no, you have to find a problem with faulty spark or spark plug wires.
I am biggest fan of XTS2500 and ASTRO Digital Saber.

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Re: Fighting Noise In A 2018 Honda CR-V

Postby abbylind » Tue Aug 14, 2018 12:15 pm

Thats definitely ignition noise. Spark plugs (must be resistor) ignition wires, yours has the coil over Replace them. Look for loose or corroded connections. Dont disregard the connections for the tach. It takes impulses from the ignition. I had a poor connection on the tach caused lots of emitted RF.

Good luck

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