EGR bypass - FANTASTIC -but buzz noise on idle....

pedu · 3rd January 2011, 10:03

Hi,

I have changed my EGR with a bypass.

Went for a test drive : better engine respons
more torque from 1200 rpm
smoke has gone

But coming home with car on idle there is a electronic buzz that I can hear.

When I rev the engine it goes but afther a few seconds off idling it is back.

What is it ?

Greetings

Peter

ceedy · 3rd January 2011, 10:49

Quote:

Originally Posted by pedu

Hi,

I have changed my EGR with a bypass.

Went for a test drive : better engine respons
more torque from 1200 rpm
smoke has gone

But coming home with car on idle there is a electronic buzz that I can hear.

When I rev the engine it goes but afther a few seconds off idling it is back.

What is it ?

Greetings

Peter

There nothing that "electronically should buzz" after fitting an EGR..

I would suggest that as you've had to disturb a few bits to fit the egr , there's someting touching or loose that wasn't before.

A good "buzzer" is the plastic top cover ... if touching something

have fun

C.

Starman · 3rd January 2011, 12:38

Hi Peter. This "buzz" is something a few of us have had once the vacuum pipe to the EGR has been blanked off. It comes from the other end of the pipe and is a small solenoid that wants to sit buzzing for "seemingly" no reason. It seems to stop after some time (weeks), but as you say it starts on tickover and goes when the revs pick up.
No one has reported any negative feedback,just the noise.

Regards. Steve.

CMWI · 3rd January 2011, 12:50

Does the buzz come through the stereo speakers or you can just hear it from the car?
Since fitting a Grom interface to the Symphony to enable an iPhone/iPod connection I get a slight buzz through the speakers when pressing the throttle so presume there is some sort of interference from the throttle potentiometer.
This sounds like the opposite to your problem as mine makes no buzzing on idle.
Car also has EGR bypass, not sure if there is any relevance but would be interested to find a solution, is some sort of suppression required?

pedu · 3rd January 2011, 14:47

No the sound isn't coming from the speakers inside.

It's from the vacuum solenoid......

What can I do to stop it ?

Roverron · 3rd January 2011, 19:22

Quote:

Originally Posted by pedu

No the sound isn't coming from the speakers inside.

It's from the vacuum solenoid......

What can I do to stop it ?

You could replace the solenoid with a resistor. (you can't disconnect it or the mil will come on).

I'd be tempted to try a 27ohm 20watt power resistor - the value is probably not that critical (or you could measure the resistance of the solenoid to get a better idea)

Ron

BigRuss · 3rd January 2011, 19:53

Mine buzzes but disappears usually within a couple of minutes so I haven't bothered to sort it out.

Ron's idea with the resistor sounds a good one might give it a try.

Russ

3rd January 2011, 10:03	#1
pedu Regular poster rover 75 saloon Join Date: Sep 2007 Location: belgium Posts: 32 Thanks: 7 Thanked 1 Time in 1 Post	EGR bypass - FANTASTIC -but buzz noise on idle.... Hi, I have changed my EGR with a bypass. Went for a test drive : better engine respons more torque from 1200 rpm smoke has gone But coming home with car on idle there is a electronic buzz that I can hear. When I rev the engine it goes but afther a few seconds off idling it is back. What is it ? Greetings Peter

3rd January 2011, 12:38	#3
Starman Posted a thing or two 03 CDTi Tourer Conn SE auto Join Date: Jul 2007 Location: Shrewsbury Posts: 1,405 Thanks: 0 Thanked 15 Times in 4 Posts	Hi Peter. This "buzz" is something a few of us have had once the vacuum pipe to the EGR has been blanked off. It comes from the other end of the pipe and is a small solenoid that wants to sit buzzing for "seemingly" no reason. It seems to stop after some time (weeks), but as you say it starts on tickover and goes when the revs pick up. No one has reported any negative feedback,just the noise. Regards. Steve. __________________ [SIGPIC][/SIGPIC]

3rd January 2011, 12:50	#4
CMWI Loves to post Monogram Atmosphere Kinetic ZT 180 Sport Auto Join Date: Aug 2009 Location: New Forest Posts: 475 Thanks: 3 Thanked 14 Times in 13 Posts	Does the buzz come through the stereo speakers or you can just hear it from the car? Since fitting a Grom interface to the Symphony to enable an iPhone/iPod connection I get a slight buzz through the speakers when pressing the throttle so presume there is some sort of interference from the throttle potentiometer. This sounds like the opposite to your problem as mine makes no buzzing on idle. Car also has EGR bypass, not sure if there is any relevance but would be interested to find a solution, is some sort of suppression required? __________________ The 8th (and final) Monogram Atmosphere Kinetic ZT, the only 180 Sport Auto saloon ever made in this colour.

3rd January 2011, 19:53	#7
BigRuss Premium Trader 75 CDT Tourer,2.5 Launch Saloon, Omipro MG/Rover (T4) Join Date: Jul 2007 Location: Liversedge, West Yorkshire Posts: 5,405 Thanks: 1,105 Thanked 1,340 Times in 661 Posts	Mine buzzes but disappears usually within a couple of minutes so I haven't bothered to sort it out. Ron's idea with the resistor sounds a good one might give it a try. Russ __________________ Replacement Key Service http://https://the75andztclub.co.uk/...d.php?t=244732 Full T4 Testbook diagnostics available. Diesel ECU repair and replacement. Options enabled or disabled as required. Diesel X-Power 135 and 160bhp, Rover 1.8T 150 to 160 MG 160 V6 to 177 upgrades available P.M. for details.

3rd January 2011, 14:47	#5
pedu Regular poster rover 75 saloon Join Date: Sep 2007 Location: belgium Posts: 32 Thanks: 7 Thanked 1 Time in 1 Post	No the sound isn't coming from the speakers inside. It's from the vacuum solenoid...... What can I do to stop it ?