| Home |
| Search |
| Today's Posts |
|
#11
December 6th 04, 11:52 PM
|
|||
|
|||
Ford. Check the tie rod ends!!!!!
"Jay in the Mojave" wrote in message ... Hello Dr Bob Parker: This sounds like a really bad case of RFI (Radio Frequency Interference) over and beyond the normal noise (HEARD) in these trucks. Ignition noises are RF Energy from the ignition system that are induced into the wiring and radiated into the air. The factory supplied bypass capacitors work really well to suppress these noises and interference. The Ignition noises will sound like a poPping type noise and will increase with the engine RPM's. Alternator noises come from the diodes in the alternator turning off and generating RF Energy. The alternator noise makes a whin(/)ing type of noise, that will increase in pitch when the engine RPM's increase. A Capacitor (.1 uF at 50 VDC) connected to the alternators output terminal will help reduce the alternator noises. The Fuel Pump in Fords is NOTORIOUS for making RF Noises. And there are fixes for it from Ford. The inside the gas tank fuel pumps can be made to have a significantly reduced noise. Wrapping stranded wire around a plastic gas tank, and ground the turns of wire to the tracks chassie and frame will help. Adding in a bypass capacitor between the positive and negative wires to the pump (as close to the pump as possible will also help. Adding a choke in the positive wire (wiring wrapped around a ferrit snap closed core (available at Radio Shack) will also help. RFI needs 3 things to exist. 1- A Generator, something to generate the RF Noise, the RF Noise can be induced into the wiring or radiated into the air (or both) where the antenna receives it. 2- A path needs to exist so that the RF Energy can be transferred from the generator to the receiver. 3- A receiver needs to hear the RF Noises that are interference. Its is best to remove or attenuate the RF Noise or energy at the source. But this is much easier said than done. But in many cases if you can remove the path or add a filter to the receiver the RF Noises can be attunated to a acceptable level. From your discription this RFI or RF Noise is way more than experIenced by others. It maybe possible that the factory did not install the noise suppresSion capacitors in the ingition system. Maybe a local Automotive Electrial Shop may help you out there. But to me it sound slike a really bad case of noises. You didn't tell us any thing of your installation, what radio, how it is wired, antenna type, how is it installed what the SWR? This was taken from one of the sites he "Anyone using a ham radio or C.B. in their Explorer has most likely heard the effects of RFI. The interference sounds like a high ambient noise level and the receiver possibly shows many S-units of signal strength even when there is no one transmitting. The in-tank mounted electric fuel pump is the source of this problem. Fortunately Ford has a fix for this problem which is covered under the original warranty. If the truck is out of warranty you can get the parts and do the job yourself or have it performed at a shop. The Service Bulletin that covers this problem is # 9117-5. The part you need is a Filter Kit, Ford Part # E7PZ9B357A. Although the addition of the filter did cure about 90% of the problem some interference is still noticeable on a few of the Ham Radio bands. Even so, it sure sounds much better then before the fix. Additional info from Pat Freeman: I was having fuel pump noise and saw the TSB and part number listed in the tech tips section. I gave these to my dealer and he let me know that these were for vehicles up to 1999. There is some updated information that we all might benefit from I have a 2001 Sport Trac and TSB # 01-07-03 is for installation of a noise suppressor in the fuel tank, Part # F1PZ 18B925 A. " Heres a few web sites that might help. http://www.arrl.org/tis/info/rficar.html http://popularmechanics.com/automoti...e/index3.phtml http://www.sacskyranch.com/altnoise.htm http://www.tessco.com/products/displ...&subgroupId=65 Jay in the Mojave Dr Bob Parker wrote: I have a 3 month old 2004 Ford-25 p/u and if I turn my radio to AM or my CB on, I can hear the ignition noise in my engine and turn signals cause a clicking, and when I put on brakes or turn on headlights is causes a clicking noise. Teh ignition noise just about drwons out reception completely. Ford says it is in all of their trucks and put a new radio in for me but it is the same. Local service dept says they have no way of knowing how to remedy the problem, and will have to wait till enough people complain and a fix is found. Can anyone tell me what the problem is? I have heard it may be either the fuel pump or the alternator, but ford service says they don't know how to fix. Dearborn will not answer my queries now. I am about to file a Lemon law complaint with the attorney general of FL which will require them to fix or replace the truck. I love the truck as I have all my ford trucks but this is flabergasting me. bob |
| Reply |
|
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Forum | |||
| Sneaking tiny radios into North Korea | Broadcasting | |||
| Comparison of six portable radios | Broadcasting | |||
| export cb radios | Policy | |||
| FS MOTOROLA RADIO'S | Equipment | |||
| MOTOROLA RADIOS for Sale! | Equipment | |||
Linear Mode
