Engine noise on Cobra 75wxst in Jeep Wrangler

[imustbenuts]

Hi all,
I'm new here and to CBs. I installed my radio and can't seem to get rid of the engine noise. I've tried different ground location, noise filters, and nothing seems to help. Anyone have any ideas on how to fix this. I installed + to battery and - to body. The antenna is Firestik II and useing firestik cable with firering. My antenna mount shows .000 resistance and .006 at the other end of cable. Really getting frustrated with this.

 

[Beetle]

Is the noise coming in via the antenna, or via the power leads? Search the forum for the problem - there are LOTS of posts addressing this with various vehicles.

 

[CM-4441]

Beetle was right. Before you can fix the problem you have to figure out where it is coming from.

Does the noise increase and decrease with engine RPM? What about the fan setting for heat/cooling? Another problem area can be the electric fuel pump. You might be picking up noise from the electrical system through the air and electric hookup at the same time too! Isn't this getting fun!:headbang

Terry

 

[imustbenuts]

Hi all,
I'm new here and to CBs. I installed my radio and can't seem to get rid of the engine noise. I've tried different ground location, noise filters, and nothing seems to help. Anyone have any ideas on how to fix this. I installed + to battery and - to body. The antenna is Firestik II and useing firestik cable with firering. My antenna mount shows .000 resistance and .006 at the other end of cable. Really getting frustrated with this. :headbang:headbang:headbang

 

[imustbenuts]

Sorry for the double post!!!!

 

[imustbenuts]

Beetle was right. Before you can fix the problem you have to figure out where it is coming from.

Does the noise increase and decrease with engine RPM? What about the fan setting for heat/cooling? Another problem area can be the electric fuel pump. You might be picking up noise from the electrical system through the air and electric hookup at the same time too! Isn't this getting fun!:headbang

Terry

Yes, it increases and decreases with the RPMs. I have no idea what or how to check where it is coming from. Most of my searching leads me to believe it is a ground loop. But it could be anything. The antenna is mounted on the rear passenger side. What is the best way to start the diagnosis?

 

[psycho]

Yes, it increases and decreases with the RPMs. I have no idea what or how to check where it is coming from. Most of my searching leads me to believe it is a ground loop. But it could be anything. The antenna is mounted on the rear passenger side. What is the best way to start the diagnosis?

Take the antenna off and see if the noise is still there. That will tell you whether the noise is in the power line or received by the antenna.

 

[GnG8d]

Take the antenna off and see if the noise is still there.

Unhook it at the radio?

 

[CamoRedneck]

Unhook it at the radio?

Yes, if the noise stays your power leads are picking it up.

 

[GnG8d]

Yes, if the noise stays your power leads are picking it up.

I understand, I'm just not so sure that removing the antenna is necessary.

 

[mackmobile43]

I understand, I'm just not so sure that removing the antenna is necessary.

Makes as much sense as this does.
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