100 Series T/D HF radio interference
Submitted: Tuesday, Dec 03, 2002 at 01:00
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Phil
i have recently installed a
HF radio in my 100 Series Turbo Diesel Landcruiser (Barrett 950 with auto tune aerial) and find that the 100 Series TD fuel injector creates an apparently insolvable level of interference with the
HF radio,which makes the radio totally impossible to to use whilst the engine is operating.
Whilst I know interference is a common problem, this extreme level is apparently unique to the 100 T/D and the installers advise that it is experienced regardless of the model of
HF radio.
Apparently European standards preclude such radio emissions from injectors etc but we do not enjoy such protection in Australia, and with this particular model Toyota they have not seen the need to comply with superfluous foreign standards with their Australian product.( ??)
Earthing the bonnet with braid, and the exhaust, and and aluminium shield over the injectorall I am told will not work.
Does anyone have the same problem, or better still a solution ? ( other than trading in on a Nissan or not driving out of mobile phone range).
Reply By: ken d - Wednesday, Dec 04, 2002 at 01:00
Wednesday, Dec 04, 2002 at 01:00
Hi all
Has anyone actually confirmed that it is radio frequency emissions that are causing the problem and not noise on the power feed to the radio?
Or a combination of both?
If you park next to another
HF radio operator with your engine running do they hear the noise on their sets?
If so how far away do they have to go before the noise can no longer be heard?
Do you have noisey or poor reception on your normal AM radio reciever?
Can you hear it on 27Mhz CB radio or any other reciever?
If we can locate exactly where the noise is coming from and how it's getting into the radio we are a long way to fixing the problem.,
Further to this if it is radio frequency emmisions are causing a problem it may be a case for the Australian Communication Authority however it's a bit early to tell.
Cheers
Ken
AnswerID:
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Reply By: ken d - Thursday, Dec 05, 2002 at 01:00
Thursday, Dec 05, 2002 at 01:00
Hi all.
I've had a bit of a poke around.
If you have a look here -
http://www.denso.com.au/dw/fuel/fuel_prod.htm
I think you'll find a picture of the ECD-V4 pump which I believe is what the 100 series TDs are using.
You can see things like the pulser and engine speed sensor. They work together and are most probably electromagnetic.
This is just one possible source of the radio interference but again we have to do some elemination and find how the problem is getting to the radio..
It won't be impossible to overcome.
Barret and Codan might not have a solution, however without intending any ill will, ( they are probably both quality companies) their priorities may lie with other issues and haven't got around to making an indepth investigation into this particular compatability problem. I may be wrong.
Ken
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9360