[RFI] AM radio RFI from 2010 Ford Escape

[David Jordan]

A couple of those Ford engineers are hams. I've spoken to them about the
Ford 2001 Explorer.  Basically, 99% of all their work is to ensure the
vehicles are in compliance for radiation emitted from the vehicle. They have
few if any official solutions for our on board ham radio RFI issues.  At
least that was the case when I spoke with them several years ago.  I doubt
much has changed since then...hams don't drive the auto industry response to
RFI and the FCC requirements are much like building codes... no one would
buy a home that was built to just meet the building codes.

YMMV,
Dave
Wa3gin

-----Original Message-----
From: rfi-bounces at contesting.com [mailto:rfi-bounces at contesting.com] On
Behalf Of dgsvetan at rockwellcollins.com
Sent: Thursday, October 28, 2010 12:32 PM
To: Roger (K8RI)
Cc: rfi at contesting.com
Subject: Re: [RFI] AM radio RFI from 2010 Ford Escape

Roger,

Believe it or not, Ford actually has a comprehensive EMC group within the 
corporation (as do GM and Chrysler).  I worked with a few of their 
engineers when I was in the RF shielding business in the 1990's.  I even 
had to drive to Dearborn once to help perform a trouble analysis on a very 
large test chamber that had an RF leak.  Although I have been out of the 
shielding biz for a decade now, I spoke with a couple of Ford's engineers 
just two years ago at an IEEE EMC event.  So, they do have people to work 
the issues.  I suspect that the main problem is finding someone with the 
right info to tap into their knowledge data base on specific vehicular 
problems. 

Keep at it.  Sooner or later, you'll probably get through to someone who 
has the answer or who knows where to go find the answer. 

73, Dale
WA9ENA

 



"Roger (K8RI)" <k8ri at rogerhalstead.com> 
Sent by: rfi-bounces at contesting.com
10/27/2010 05:44 PM

To
rfi at contesting.com
cc

Subject
Re: [RFI] AM radio RFI from 2010 Ford Escape








On 10/27/2010 6:29 PM, John Brosnahan -- W0UN wrote:
> We recently purchased a 2010 Ford Escape with the 3.0L V6 engine and
> automatic transmission.  I entertained the idea of adding a mobile
> rig to the vehicle but the noise level in the stock AM radio has
> discouraged me unless I can sort out and fix the source of the RFI.
I ran into computer noise some years back when looking for a new car. 
This was when Chrysler came out with the so called "cab forward" design. 
The V-6 in those generated a computer "carrier" on 147.00 and it was 
rock steady. If the can had set long enough it was quiet, but all you 
needed to do was unlock, or open an unlocked door and it was there.  It 
was also strong enough to drown out the local repeater from just over 2 
miles when it was nearly a block away from me.

Several dealers worked with me, but the corporation was pretty much non 
communicative.

Perhaps the Ford dealer  or even corporation might be willing to work 
with you.

OT OH I have heard of a number of fuel injector noise incidents over 
recent years. They were not specific to any particular car IIRC.

73 and good luck,

Roger (K8RI)
> The RFI is frying noise that pretty much disappears when you let up
> on the accelerator but immediately returns once you hit the gas
> again.  So I think it is probably fuel injector related.
>
> I have done some google searching for info on this noise on the Ford
> Escape to no avail.  Can anyone suggest a source of info for curing
> (or at least greatly reducing) the AM noise when the gas pedal is 
depressed?
>
> Thanks  --  John  W0UN
>
>
>
> _______________________________________________
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