[Mobile-Portable] 96 Ford Bronco fuel pump

Gary Fiber gfiber at comcast.net
Wed Oct 7 08:20:59 EDT 2009 

Randy,

Great on the steel tank. I was amazed when I 
discovered my then 1996 Ford Ranger had a plastic tank.
Yes I worked for Icom America from 1989 until 
2001 in Tech support. I did most of the emails 
including Compuserve's HamNet forum for several years.
I work for the state now days. Been helping man 
the booth at the Dayton Hamvention for them too.
N1KHB was correct that the Ford filter will stop 
radiation down the power leads.
Gary Fiber K8IZ


At 08:04 PM 10/6/2009, you wrote:
>Gary & Group ,,,,  The 96 Bronco has a steel 
>30gal tank so it should insulate the pump "If it 
>is noisy when its back on line. After the Bronco 
>Im tackling a 05 Ford Excursion 6.0 
>diesel.  Your name sounds familiar ?  Did you 
>work at Icom repair ?  Or maybe I know you from 
>the Icom hf net ?    Thanks for the help.  
>   Randy   N5WV ----- Original Message ----- 
>From: "Gary P. Fiber" <gfiber at comcast.net> To: 
>"Mobile-Portable Reflector" 
><mobile-portable at mailman.qth.net> Sent: Monday, 
>October 5, 2009 10:14:33 AM GMT -06:00 US/Canada 
>Central Subject: Re: [Mobile-Portable] 96 Ford 
>Bronco fuel pump Joe, Generally you would be 
>correct with a metal fuel tank. But in my case 
>1996 Ford Ranger XLT 2WD has a plastic fuel tank 
>so it did nothing to shield electrical noise 
>emitting from the fuel pump. I suspect the 1996 
>Bronco fuel tank is also plastic. Ford did have 
>a factory RFI filter they installed when they 
>received complaints, they had to drop the tank 
>to install it. When they did mine they did not 
>locate up the gasket from the tank outlet lines 
>and pump acess hole properly so on a fill-up I 
>would get a strong smell of gasoline. Seems my 
>2009 Toyota Tacoma has a plastic tank too. I 
>have not tried the 706MKII to see if its fuel 
>pump emits noise like the Ranger did. The noise 
>from the Ford's fuel pump was over S9 made HF 
>operation darned near impossible. I had the 
>entire truck bonded, the antenna was on the left 
>rear corner, power direct from the battery. Just 
>turning on the key would raise a lot of noise in 
>the transceiver. Gary Fiber K8IZ n1khb at aol.com 
>wrote: > Just some theoretical thoughts here - > 
>If the fuel pump motor is noisy, then the noise 
>would be considered as > coming from the supply 
>wire leading to it. The pump itself is located > 
>within the tank which would act as a shield, 
>therefore the only > radiator left is the wire 
>even though the pump is generating the noise > 
>in the first place. The best location for any 
>filters for the pump > would be at the tank in 
>order to minimize the exposed length of > 
>unfiltered wire. This would hold true for an OEM 
>filter or with a > homebrew one. If I were to 
>build a filter for this purpose, I would use > a 
>pi configuration. I wonder what the OEM one 
>consists of. > In my experience with Ford 
>(actually a Grand Marquis) the engine > computer 
>was the proven major noise contributor, with the 
>fuel pump > contributing nearly nothing to the 
>noise floor. Everyone (other hams) > told me to 
>suppress the fuel pump, but it just wasn't the 
>case in my > particular situation. I'm not 
>saying that every vehicle works out the > same 
>way, just my experience. BTW, my Ford dealer 
>bent over backwards > to help me with my noise 
>problems even to the extent of replacing the > 
>engine computer with a new less noisy version 
>for FREE! Yay Ford! I'll > remember that as a 
>future potential customer. > > Best, > Joe 
>N1KHB > > > > > -----Original Message----- > 
>From: Jerry Flanders <jeflanders at comcast.net> > 
>To: Mobile-Portable Reflector 
><mobile-portable at mailman.qth.net> > Sent: Mon, 
>Oct=2 > 05, 2009 9:46 am > Subject: Re: 
>[Mobile-Portable] 96 Ford Bronco fuel 
>pump > > > > Some auto companies provide a RFI 
>suppression kit > for the fuel pump, IIRC - 
>ask. > > FYI - The fuel pumps that I have had 
>always came > on for several seconds to 
>pressurize the fuel > line as soon as I turned 
>the key on. I didn't > have to engage the 
>starter or start the car - > just turn the key. 
>They made a slight vibration, > and I could 
>actually hear them running. Would > have made it 
>easy to see if they were causing > electrical 
>noise by themselves. Don't know if you > can use 
>this technique now with the tank out. > > Jerry 
>W4UK > > At 02:19 AM 10/5/2009, you wrote: > 
>Â  >> Group , I have never operated hf mobile 
>with my >> 96 Bronco and have no idea if its 
>fuel pump is >> noisy ? Â It is now at my 
>mechanic with the >> fuel tank dropped awaiting 
>a new oem fuel pump. >> With me picking up a new 
>fuel pump this week and >> with now being the 
>time to add any noise >> suppresion components 
>to it , can anyone tell me >> what I need to add 
>besides toroids to the power >> connections to 
>the fuel pump. I have read in >> past articles 
>where some have added resistors , >> capacitors 
>, etc.  It may not be noisy but If >> it is 
>, now would be the time for remedy being >> an 
>internal fuel pump requiring the tank being >> 
>dropped.   Any tips would be great !  
> >>  73 ,  de  Ra >>    > ndy 
>N5WV > Â  >> 
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Gary Fiber K8IZ
GROL PG-19-6691
Washington State Resident

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