Radio Interference

Submitted: Thursday, Sep 22, 2011 at 11:34
ThreadID: 89170 Views:1291 Replies:3 FollowUps:1
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I have a 100 series LC and noticed on my last trip to Qld that after leaving Sydney and reaching the expressway I started to get interference on my radio. It only happened on AM channels and only when the engine was under load. As soon as I took my foot off the accelerator the interference disappeared. Any ideas would be welcome.

Cheers Tom
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Reply By: Battery Value Pty Ltd - Thursday, Sep 22, 2011 at 12:51

Thursday, Sep 22, 2011 at 12:51
Hi Tom,

this is not my area of expertise.
But electrically noisy fuel injectors spring to mind.

cheers, Peter
AnswerID: 465732

Follow Up By: Battery Value Pty Ltd - Thursday, Sep 22, 2011 at 13:00

Thursday, Sep 22, 2011 at 13:00
Anything like in this sound file?

cheers, Peter
FollowupID: 739754

Reply By: MEMBER - Darian, SA - Thursday, Sep 22, 2011 at 13:47

Thursday, Sep 22, 2011 at 13:47
My 100 series doesn't do that, but a previous common rail TD did (as you say .... on am, not fm). In my view, as suggested above, it's the electronic injector circuit - it cuts out when you take your foot off the gun (fuel not required). If you take your foot off while mobile, and slip into neutral you'll hear the noise die, but then come on again once the revs get down to idle. There should be a chair in radio inteference at one of the Uni's - bugger of a problem in modern cars.
AnswerID: 465733

Reply By: Bob Y. - Qld - Thursday, Sep 22, 2011 at 20:21

Thursday, Sep 22, 2011 at 20:21

You didn't indicate whether the problem with AM reception was for all your trip to Qld, or only on the expressway?

The radios in Landcruisers have been Fujitsu for many years, and from my experience the AM section is as sensitive, or better than any other brand on the market. Upgrade with a Mobile One or Axis AM/FM whip improves reception markedly, especially in fringe areas.

There's parts of the Pacific H'way, either side of Grafton, where AM reception is worse than western Qld!!!

Looks like both Peter & Darian might have picked your problem, but has it only just started? Some road surfaces will influence AM reception in fringe areas, like bulldust, but wouldn't think bitumen would do it.

There's a couple of things you can do with co-ax & power leads that might help, if the problem won't stop.

Tell us how you get on,

Seen it all, Done it all.
Can't remember most of it.

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