ECU whine

[Codshead]

Does everybody get the electronic whine from the ECU? Sounds like the cockpit of a747 when I'm stationary.

[nicktowe]

Codshead said:

Does everybody get the electronic whine from the ECU? Sounds like the cockpit of a747 when I'm stationary.

Not at all, are you sure its the ecu?

[Codshead]

Not easy to trace as it's only there when the engine is running. I've just had another listen and it could be coming from the speakers (without the radio on).Maybe the ICE is picking up and amplifying something else.

[GreenV8S]

Codshead said:

Does everybody get the electronic whine from the ECU? Sounds like the cockpit of a747 when I'm stationary.

No, the ECU should be completely silent.

[spend]

He might have a Tornado chip fitted?

Dave

[Codshead]

Ha bloody ha!!!!

[mdotrutherford]

Codshead said:

Sounds like the cockpit of a747 when I'm stationary.

Doubt that, stick your head out the window at around 70 - thats nearly there........

[thenick]

Sounds like altenator whine... Its caused by interference when power wires are run too close to speaker wire or possibly a bad earth. Does the pitch change with revs?

[That Daddy]

thenick said:

Sounds like altenator whine... Its caused by interference when power wires are run too close to speaker wire or possibly a bad earth. Does the pitch change with revs?

Or a crap Headunitmaybe.

[thenick]

True, but if he said it does it when the radio is off then its more likely to be a wiring or earth problem... you can buy sound supressors to fix this from Halfords but it can be solved by moving or insuating the speaker wire or re-earthing the headunit with a better connection.

[spend]

thenick said:

..it does it when the radio is off ..

That would be a really really CRAP head unit in that case

Dave

I'm determined to cure my cold by getting pissed until it it submits :-))))

[Codshead]

thenick said:

Sounds like altenator whine... Its caused by interference when power wires are run too close to speaker wire or possibly a bad earth. Does the pitch change with revs?

Seems to disappear when revs increase, although this could be due to the increase in engine and exhaust noise. I'll check out the routing of the speaker wires first.It's not really a whine that I've had before on other cars which does increase with revs which will come through the speakers but more of the high pitched noise you sometimes get when electronic equipment is switched on.

[Peter66]

Perhaps it's one of the heater servo's controlling the heater valve or flaps. This could only happen though if there is a shortcut (switch/connectors) somewhere. Important check do you hear the noise when the engine is not running, but you have the contact on 'start'. (LEDs on dashboard on)? If it's only happening with a running engine I agree with the other comments on a radio/wiring problem. Do you have a separate amplifier (in the back)? If yes connection to head unit (shielded/earth) is critical.

Good luck,

Peter

[KarlR]

Its not the fuel pump is it?? I get a constant hum from the pump... which sounds like an electronic whine..

[nicktowe]

KarlR said:

Its not the fuel pump is it?? I get a constant hum from the pump... which sounds like an electronic whine..

Ifits that loud all the time, it might be a good idea tohave spare fuel pump handy.

[Codshead]

I'm away for a few days so I'll check out all your suggestion when I get back. Thanks to everybody for your ideas.

[Codshead]

KarlR said:

Its not the fuel pump is it?? I get a constant hum from the pump... which sounds like a n electronic whine..

It IS the fuel pump.The noise is being amplified and coming through the speakers mounted in the rear bulkhead. I'll trace the speaker wires and shield them. Thanks for all your suggestions.