Fuel-pump noise is a known Ford problem. Ford disucsses this in a Technical
Service Bulletin, TSB-93-15-6. They offer a fuel-pump filter that installs
in the tank, right next to the in-tank fuel pump. The part number for the
filter is F1PZ-18B925-A. Some small trucks have TWO fuel pumps -- one in
each tank.
The filter works MOST of the time. I suspect in cases where it didn't, it
may not have been installed correctly.
Refer also to several Hints and Kinks type articles that appeared in QST:
QST Nov 91, p 52
QST Aug 91, p 40
QST Sep 94 featured an article that discussed various manufacturer's
policies about automotive RFI problems. A followup QST "Lab Notes" column
in Mar 95 discussed automotive RFI in general. ARRL's book, Radio Frequency
Interfernce: How to Find It and FIx it has a chapter on auto RFI, written by
an engineer in the auto industry.
73 from ARRL HQ,
Ed Hare, W1RFI
ARRL Lab
----------
>From: NEDROG
>To: rfi
>Subject: [RFI] fuel pump noise in a 1994 FORD EXPLORER
To: <rfi@contesting.com>
>Date: Wednesday, January 21, 1998 11:29PM
>
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>From: NEDROG <NEDROG@aol.com>
>Message-ID: <745ed7fd.34c6cb2f@aol.com>
To: <rfi@contesting.com>
>Date: Wed, 21 Jan 1998 23:29:33 EST
>To: rfi@contesting.com
>Subject: [RFI] fuel pump noise in a 1994 FORD EXPLORER
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>Hello,
>
>Does anybody know of a solution to get rid of the FUEL-PUMP noise in a FORD
>EXPLORER?
>
>I am running an Icom 706 and get the noise as soon as I turn the key on. I
>get it on 80m thru 2m in SSB only. 2m FM is OK!
>
>Thanks,
>
>Howard W3CQH
>
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