UHF radios and fuel injection systems

Submitted: Thursday, Jul 22, 2004 at 17:07
ThreadID: 14913 Views:2055 Replies:7 FollowUps:0
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Hi everyone,

Am pricing up a Landcruiser 4.2l turbo diesel and one salesman's claim rather interested me. He maintains that UHF radios sometimes affect the Landcruiser's fuel injection system. His comment came after I asked whether they would transfer my UHF (and caravan electric brake controller) from my Falcon to the new Landcruiser.

He said they would not fit the radio but would happily refer me to an auto electrician because of possible problems.

Has anyone else had problems with UHF affecting their fuel injection systems, or was he trying to spin me a fast one?!

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Reply By: MikeV - Thursday, Jul 22, 2004 at 18:06

Thursday, Jul 22, 2004 at 18:06

I run a UHF CB, 27Mhz CB, VKS737 radio and various HF and VHF amateur radios - all while mobile - none interfere with my '93 cruiser TD.


AnswerID: 69068

Reply By: Wazza (Vic) - Thursday, Jul 22, 2004 at 18:17

Thursday, Jul 22, 2004 at 18:17
Hi Dennis,

Maybe he meant the other way around where the fuel injection interferes with the UHF. But, this only usually happens with an electric fuel pump on a petrol car, so he has me baffled.

AnswerID: 69071

Reply By: allblack55 - Thursday, Jul 22, 2004 at 18:19

Thursday, Jul 22, 2004 at 18:19
The salesman is only quoting from the current Landcruiser owner manuals which warn of potential EMI/RFI problems to a vehicles electronic systems. (What they don`t warn you about is that these same vehicle electronics can cause interference to your radio equipment) Having said that it should also be pointed out as a somewhat rare event. Generally speaking a mobile radio installation has the possibility to cause problems, for every installation that can be proven to cause a problem to the vehicle operating system there are tens of thousands that don`t. If you are concerned then have it fitted by a comms. technician. As a general rule pay attention to earthing, aerial placement and cable/s positioning.

If you want some more details regarding RFI symptoms/detection/fixes in vehicles contact me

AnswerID: 69072

Reply By: Lone Wolf - Thursday, Jul 22, 2004 at 21:11

Thursday, Jul 22, 2004 at 21:11
He might be thinking of the Disco, this does happen, as was reported in one of the 4 x 4 mags not long ago, but I am not sure if it was UHF or HF........... I think it was HF.


AnswerID: 69121

Reply By: Brew69(SA) - Thursday, Jul 22, 2004 at 21:17

Thursday, Jul 22, 2004 at 21:17
Did he have both hands in his pockets when he suggested it? lol
AnswerID: 69125

Reply By: Mad Dog (Victoria) - Thursday, Jul 22, 2004 at 21:57

Thursday, Jul 22, 2004 at 21:57
I agree with the others. The potential is there but it's uncommon for it to occur. At one stage my wipers did a wipe when operating on HF but that was cured by re-routing some wires.. My ute is at times an RF jungle but it all runs sweet.
AnswerID: 69141

Reply By: Wizzy - Tuesday, Jul 27, 2004 at 18:07

Tuesday, Jul 27, 2004 at 18:07
Thanks for all your comments everyone ... much appreciated.

I have had UHF in my last two new Falcons without any problems and I just wondered whether this salesman was being serious or not!

I will be fitting UHF to the new LC ... couldn't travel without one!

AnswerID: 69924

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