Question about Cobra 18 WX ST II 40-Channels Base CB Radio

1 Answer

'91 Mazda Protege

During cold starts, there's a squealing noise from under the hood. It only lasts until the car warms up. I'm thinking it's the fan belt, but I'm not really sure. Can't fix what I don't know.

Posted by on

  • scott LeBars Jan 22, 2009

    That totally made sense. I will replace the serpentine belt and hopefully that fixes the problem.

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 328 Answers

It sounds like the serpentine (fan belt) is slipping and causing your squeal. If you haven't replaced it for a while you could be in need of a new one. When they get old the rubber gets hard and stretches.When you hear the squeal the belt is slipping and the friction from this causes heat and warms the belt and makes it stickier and it will then stop slipping. If your battery is being drained while the car is off or if you need to crank it for an extended period of time the extra strain from the alternator bringing the system back to proper voltage can also cause this as well.But replacing the belt is the first place to start.
hope this helps!

Posted on Jan 16, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Connex 4300-300 squeals in talk back mode


turn rf gain up and the mic gain down until it stops squealing.

Jul 14, 2012 | Connex Cb Faceplate Sticker-fits 4300-300

1 Answer

TX oscillation


Make sure your boots are switched off and run the radio off a good car battery before you start looking for problems inside the radio. This problem may clear or change characteristics when the supply is changed.

Nov 28, 2011 | Cobra 148 GTL 120-Channels Base CB Radio

1 Answer

I transmit fine but unless im close to someone when they talk the static over rides them and i can not understand them and i am also picking up alternater noise


Interference / noise elimination can be a test for how much money you want to spend and how deep you're willing to look. CB radios are AM and prone to noise. Here are some things you can try to eliminate or determine the source of the noise. Understand that there are only 2 ways for noise to enter the radio: power leads or antenna lead.

Connect the power leads directly to the battery - not the accessory terminal of the fuse block - nor "tap" into an existing 12 V power line you happen to find. Turn the radio on to an unused channel - it should be fairly static free. Turn the ignition key to the RUN position. It should still be clear - but if you hear a sudden spike of noise that lasts a few seconds before stopping, the static is likely to be coming from your fuel pump in your gas tank. The pump runs to pressurize the fuel lines to the fuel injectors when the key is turned to START. The Ford Explorer is notorious for this - but cab be reduced by following this link. It may work for your car, too.

Turn the ignition key to start the engine and let the engine run at idle speed. Listen to the radio as you vary the RPM from idle to 1000 - 1500 and let settle to idle again. Popping sounds that keep time with the speed of the engine is likely yo be ignition noise. This is caused by the high voltage (10,000 + volts) ignition system that provides spark for combustion in the cylinders. You vehicle may have more than one location where spark occurs. The spark plugs, distributor cap, rotor and coil are the primary sources of ignition noise. Replace broken, cracked, or otherwise damaged components and change the wires and spark plugs to "radio resistor" types. If a rising and falling whine is heard, the source is likely the alternator.

If there was no change - disconnect the antenna from the connector at the back of the radio. If the sound magically goes away - the vehicle and radio power are filtered very well - the noise in entering via the antenna lead.

Install a "filter" on the radio power leads - as close to the radio as possible. The power leads act like an "antenna" for all kinds of under-hood noise sources and carry it right into the radio.

Install a "filter" on the radio power leads - as close to the radio as possible. Since the power leads act like an "antenna" for all kinds of under-hood noise sources and carry it right into the radio, they should be stopped before they enter the radio. A coil (called a "choke") inserted between the power source and the radio along with a capacitor between the 12V + lead and ground is an effective filter. These filters are commercially available everywhere and also on eBay.

If the noise is getting in the coax cable, make sure your antenna is well grounded. Resist the temptation to use a "mag mount" as the ground is poor if not non-existent. Some have had some luck using snap choke cores but I haven't used them myself.

Lastly, don't expect to remove ALL the noise. You'd be the first to do so. Some methods work better than others. You can find a wealth of info by googling "CB Noise Filter" or "12V filter" (no quotes)

Please rate this if it was helpful - good luck!

Aug 23, 2010 | CB Radios

1 Answer

RCI 2970 squeels until you unplug the external speaker and plug i


Strange! I used to run almost the same kinda setup but with a super scanner omnibeam, i modded mine myself. At 1 time i had a squeal problem it was in the mic if i remember correctlly i ran a external wire from the screw on the spring inside the mic where the cord comes out to the radio chassis and it stopped it give it a try. I used a simple speaker wire, also you might want to try grounding the radio to the power supply. Sounds like a ground problem! I have a awsome mod for that radio that would enable you to run a regular amp with it and also would enable you to talk local without engaging the amp in the radio using only 4 watts! Let me know how it works out for you with the squeal? if intrested in that mod contact via email at (noteethontop@yahoo.com). put 2970 in the subject line. Take care.

Jan 17, 2009 | CB Radios

1 Answer

CB Squeal When Transmitting


I believe the coiled coax may indeed be the problem. To check, try a temporary rerouting of the cable which eliminates the coils. Dave g.

Dec 20, 2008 | Galaxy Radios DX-44V 40-Channels Base CB...

1 Answer

Squealing Noise


Hi,

Some radios use the push to talk switch in the microphone to ground the receiver section when transmitting instead of a relay in the radio. There may be a problem with that switch, or the switching circuit in the radio itself.

If you have a PA switch make sure it is in the off position, if on it will squeal like a pig!

Oct 17, 2008 | Connex 4600 Base CB Radio

4 Answers

CB Squeal When Transmitting


Grounding the antenna bracket is extremely important, if it's bolted into the metal frame or fender it should be OK. The coiled coax cable could be the culprit but that's only a remote possibility.Try running a separate groung wire from the radio mounting bracket (or one of the radio's cover screws if not using a bracket) to the CLOSEST vehicle ground...keep this a short as possible. Your problem is definitely caused by insufficient ground at either end of the coax, with the antenna side being more suspect.

Mar 15, 2008 | Midland 1001Z 40-Channels Base CB Radio

2 Answers

Ford transit alternater


I am assuming your Transit is an older model. To get rid humming noises out of Car radios in the old days from generators and alternators there was a device they used to put on the alternator. I think it was like a capacitor. I am pretty sure you can still buy these at places like Jaycar and Dick Smith. They also used to put a device in the spark plug leads to stop interference from the motor/alternator. I don't know if this will help or not but is worth a try. Of course it could be a squealing fan belt and will do it until the belt warms up. That being the case a bit of soap or crayon on the belt will/should stop it. Hope I have helped.

Soleman13au

Nov 28, 2007 | CB Radios

Not finding what you are looking for?
Cobra 18 WX ST II 40-Channels Base CB Radio Logo

56 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cobra CB Radios Experts

AnyMHz.com
AnyMHz.com

Level 2 Expert

489 Answers

Iron
Iron

Level 3 Expert

3018 Answers

Brad Brown

Level 3 Expert

13577 Answers

Are you a Cobra CB Radio Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...