| Author |
Message |
    
flash
| | Posted on Tuesday, October 23, 2001 - 6:33 am: | 
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307 do you have any idea how to reduce fuel pump noise from a electric fuel pump. its a ford ranger thanks flash |
307
| | Posted on Tuesday, October 23, 2001 - 6:59 am: |
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The best way to get rid of the problem is to install a Hot Line Filter in line with the power wires on the CB. You can get them at Radio Shack. |
Hamcber
| | Posted on Tuesday, October 23, 2001 - 11:17 am: |
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Problem is, the fuel pump radiates noise all through the entire electrical system. My HF rig picks up the noise even when running off of it's own internal battery. The noise comes in from the antenna!!
My next plan of action is to put a filter inline with the fuel pump itself and perhaps try shielding it. That noise is murder on 20-40 meters with the 'screwdriver' antenna mounted on the rear bumper even. I have to shut off the motor to DX a weak signal on HF. |
flash
| | Posted on Wednesday, October 24, 2001 - 5:39 am: |
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Some of my buddys are sheriff patrols and they run cbs in their cars and have called the ford place they said you could put another gound on the fuel pump itself and that would help it. Who knows. |
Timex
| | Posted on Tuesday, November 20, 2001 - 10:43 pm: |
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Hey Guys, I took this from Wilson's web page, I too, had a very bad fuel pump whine in my truck, (2000 F-150) I used the filters they recomended, and lost almost all the noise. You can't buy direct from MTI. You might be able to get them to sell to you direct, or do what I did and sweettalk your local car audio shop into ordering them for you..They are cheap, too, costing about 12 bucks apiece...
Although this is not aimed at any specific auto, primarily it is noticed with the Ford and Toyota autos, with the electric fuel pump located inside the gasoline tank. The symptoms are: a noise (generally a whine or whistle) is very noticeable on the radio when the ignition is first turned on, stopping after a few seconds. It returns when the auto is started and continues as long as the engine is running. The cure: install a pair of RF filters, one on each of the leads (positive and negative) coming out of the fuel pump. CAUTION: Be sure to check the vehicle maintenance manual to get the correct wires, and not the fuel level indicator wires. We have found the best available filter for this is the LM-20RF, from MTI, in Signal Hill, California, (800) 772-0796. They manufacture a wide array of filters to solve radio interference problems.
Good luck....
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Matt
| | Posted on Wednesday, November 21, 2001 - 9:10 am: |
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I put a inline filter on the power cord for the CB and still have the noise. |
Chainsaw
| | Posted on Thursday, November 29, 2001 - 1:17 am: |
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I dont have a ford product but Ive heard this from a cb shop its kind of a home brew idea go to a auto parts store a get a condenser like the ones that come with a points set for old cars and install one on the hot side of the cb hookup wire and one on the feul pump |
Hamcber
| | Posted on Thursday, November 29, 2001 - 12:51 pm: |
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It's called a 'choke'. A condenser coil inline acts like a choke.
There's no voodoo involved, just a simple choke. BTW: It doesn't take care of the problem in every case. |
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