New shape focus estate.. 2005 1.6 TDCI

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

Robin - 28 Apr 2006 20:10 GMT

Where is the ECU that emits the pulses for the injectors?

I am suffering a lot of noise on my Amateur radio set, it seems to be in
time with the injectors, so if I can find the bugger, I may be able to
suppress the interference..

Reply to this Message

Acedrew - 28 Apr 2006 20:46 GMT

"it seems to be in time with the injectors"

You must have bloody good hearing (or an oscilloscope)....

> Where is the ECU that emits the pulses for the injectors?
>
> I am suffering a lot of noise on my Amateur radio set, it seems to be in
> time with the injectors, so if I can find the bugger, I may be able to
> suppress the interference..

Reply to this Message

Robin - 29 Apr 2006 21:28 GMT

> "it seems to be in time with the injectors"
>
[quoted text clipped - 5 lines]
>> time with the injectors, so if I can find the bugger, I may be able to
>> suppress the interference..

Yes I do have an Oscilloscope.. and when I used a small loop antenna, the RF
interference was higher around the injector cables. Also the interference
clicks increase inline with engine speed, ie more revs = more noise spikes
per second.
Next idea?

Reply to this Message

Stanjo - 30 Apr 2006 04:43 GMT

It's not the injectors or the ECU - it's the ignition coil. And the coil,
effectively being a transformer, will emit electromagnetic waves.
You may have better luck working on the radio.

You don't say how the interference is picked up - is it parasitic noise on
the power lines to the radio or it comes via RF.

Regards,
Stan

Reply to this Message

Robin - 03 May 2006 22:30 GMT

> It's not the injectors or the ECU - it's the ignition coil. And the coil,
> effectively being a transformer, will emit electromagnetic waves.
[quoted text clipped - 5 lines]
> Regards,
> Stan

No ignition coil on a Diesel?. It is Peizo Injectors. I just want to find
the ECU that drives the pulses. it is a UK 1.6 TDCI.
and it is RF bourne, same noise levels when the radio is powered by a 12V
lead acid batery.
Something similar to
http://groups.google.co.uk/group/rec.radio.cb/browse_thread/thread/c3bc4c3d665b8
7db/ee247b4e657083eb?lnk=st&q=ford++injector+noise&rnum=19&hl=en#ee247b4e657083e
b

This is why I want to find the ECU, so I can see if there is anything I can
do.

Robin

Reply to this Message

ford_technical_ - 30 Apr 2006 08:44 GMT

are you from the UK?
is this not a 1.8TDCI?
the PCM/ECU is in the drivers footwell however i dont think there is
anything wrong with it inside the injectors there are 'peizo crystals'
which vibrabe under VHF this is normal

Reply to this Message

Robin - 03 May 2006 22:22 GMT

> are you from the UK?
> is this not a 1.8TDCI?
> the PCM/ECU is in the drivers footwell however i dont think there is
> anything wrong with it inside the injectors there are 'peizo crystals'
> which vibrabe under VHF this is normal

No it is definitely a 1.6 Diesel engine Ford Focus
http://www.autoexpress.co.uk/long_term_test/55980/ford_focus_16_tdci_zetec.html

And it may be normal, it certainly is NOT acceptable under CE regulations..

Reply to this Message