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Author Topic: Can a diesel engine "pink"..  (Read 4929 times)

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JamesV6CDX

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Can a diesel engine "pink"..
« on: 04 March 2010, 14:14:56 »
I know this is a pretty daft question, given they practically run this way ....

My commonrail diesel, is making a prominent "pinking" noise under load.

It sounds JUST like my old  1994 1.4 corsa, when the ignition timing was too advanced.

What could cause this on a diesel, some sort of fuelling problem?

On a bright note, I have found a standard OBDII socket on this pug... so at least I can read the codes when my new device arrives!

Quick edit to add, this is most definately NOT just a bit of diesel knock/chatter, it is a definate, unhealthy pinking sound! combined with lost power.
« Last Edit: 04 March 2010, 14:15:54 by JamesV6CDX »
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Welung666

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Re: Can a diesel engine "pink"..
« Reply #1 on: 04 March 2010, 14:21:16 »
It's not pinking, that's it's french accent ;D ;D ;D
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tunnie

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Re: Can a diesel engine "pink"..
« Reply #2 on: 04 March 2010, 14:25:10 »
Quote
I know this is a pretty daft question, given they practically run this way ....

My commonrail diesel, is making a prominent "pinking" noise under load.

It sounds JUST like my old  1994 1.4 corsa, when the ignition timing was too advanced.

What could cause this on a diesel, some sort of fuelling problem?

On a bright note, I have found a standard OBDII socket on this pug... so at least I can read the codes when my new device arrives!

Quick edit to add, this is most definately NOT just a bit of diesel knock/chatter, it is a definate, unhealthy pinking sound! combined with lost power.

You have gone from 200bhp to 90  ::)
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Seth

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Re: Can a diesel engine "pink"..
« Reply #3 on: 04 March 2010, 14:28:19 »
Broken valve spring perhaps?
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JamesV6CDX

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Re: Can a diesel engine "pink"..
« Reply #4 on: 04 March 2010, 14:45:03 »
Quote
Quote
I know this is a pretty daft question, given they practically run this way ....

My commonrail diesel, is making a prominent "pinking" noise under load.

It sounds JUST like my old  1994 1.4 corsa, when the ignition timing was too advanced.

What could cause this on a diesel, some sort of fuelling problem?

On a bright note, I have found a standard OBDII socket on this pug... so at least I can read the codes when my new device arrives!

Quick edit to add, this is most definately NOT just a bit of diesel knock/chatter, it is a definate, unhealthy pinking sound! combined with lost power.

You have gone from 200bhp to 90  ::)

110 :P

Any anyway, having compared it with another identical model today, of the same miles, that was MUCH quicker, smoother, quieter.... mine aint right...
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Lazydocker

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Re: Can a diesel engine "pink"..
« Reply #5 on: 04 March 2010, 15:21:01 »
Only if the pump timing is out, which you should eliminate with a belt change. Any history of the pump being fiddled with?
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Marks DTM Calib

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Re: Can a diesel engine "pink"..
« Reply #6 on: 04 March 2010, 15:38:33 »
Yes they can, if, as has already been said....the pump timing is wrong.
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JamesV6CDX

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Re: Can a diesel engine "pink"..
« Reply #7 on: 04 March 2010, 15:45:11 »
Quote
Only if the pump timing is out, which you should eliminate with a belt change.


Quote
Yes they can, if, as has already been said....the pump timing is wrong.

Being a HDi - with electronically actuated injectors.. .there is no pump timing  - as the diesel injection is controlled by ECU? :question
« Last Edit: 04 March 2010, 15:48:47 by JamesV6CDX »
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joshwyatt

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Re: Can a diesel engine "pink"..
« Reply #8 on: 04 March 2010, 15:48:54 »
I've chased up the pug diagnostic man, and he's going to ring me tomorrow with a time he can fit you in  :y I'm sorry it's taken so long, but he seems so busy...maybe because french cars are awful and are always breaking down  ::)
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Marks DTM Calib

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Re: Can a diesel engine "pink"..
« Reply #9 on: 04 March 2010, 15:53:35 »
Quote
Quote
Only if the pump timing is out, which you should eliminate with a belt change.


Quote
Yes they can, if, as has already been said....the pump timing is wrong.

Being a HDi - with electronically actuated injectors.. .there is no pump timing  - as the diesel injection is controlled by ECU? :question

And the ecu gets its timing info from where......
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JamesV6CDX

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Re: Can a diesel engine "pink"..
« Reply #10 on: 04 March 2010, 15:54:35 »
Quote
Quote
Quote
Only if the pump timing is out, which you should eliminate with a belt change.


Quote
Yes they can, if, as has already been said....the pump timing is wrong.

Being a HDi - with electronically actuated injectors.. .there is no pump timing  - as the diesel injection is controlled by ECU? :question

And the ecu gets its timing info from where......

Crank sensor?  ::)

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Marks DTM Calib

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Re: Can a diesel engine "pink"..
« Reply #11 on: 04 March 2010, 15:55:20 »
With the help of.....
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JamesV6CDX

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Re: Can a diesel engine "pink"..
« Reply #12 on: 04 March 2010, 15:56:01 »
Quote
With the help of.....

Cam sensor  ;D
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Marks DTM Calib

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Re: Can a diesel engine "pink"..
« Reply #13 on: 04 March 2010, 15:58:06 »
Correct....also give a thought to what happens if the common rail pressure is low.....
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JamesV6CDX

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Re: Can a diesel engine "pink"..
« Reply #14 on: 04 March 2010, 15:59:56 »
Quote
Correct....also give a thought to what happens if the common rail pressure is low.....

If the pressure in the rail is low, then there would be a reduced (or intermittent) feed of fuel to the individual injectors?

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