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Author Topic: Strange!  (Read 1528 times)

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Strange!
« on: 26 January 2010, 07:05:19 »
Started the car yesterday morn.

Sounded like a traction engine.

Switched off, diagnostics said missfire on No. 3 cylinder.

Checked the plug wells for oil/water - all totally clear.

Put it back together again.

Sweet as a bird.
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Plomien

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Re: Strange!
« Reply #1 on: 26 January 2010, 08:19:25 »
maybe a loose connection and reseating resolved it
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Kevin Wood

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Re: Strange!
« Reply #2 on: 26 January 2010, 10:01:18 »
Quote
Started the car yesterday morn.

Sounded like a traction engine.

Switched off, diagnostics said missfire on No. 3 cylinder.

Checked the plug wells for oil/water - all totally clear.

Put it back together again.

Sweet as a bird.

Once it's raised a misfire code it will cut the injector on that cylinder to protect the cat. As to why it decided that pot was misfiring - Hmm. :-/

Does it ever miss on startup?

Kevin
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Re: Strange!
« Reply #3 on: 26 January 2010, 10:03:00 »
Never misses a beat normally, even on a cold start.
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Welung666

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Re: Strange!
« Reply #4 on: 26 January 2010, 11:47:26 »
It was cold yesterday morning B, perhaps it just didn't feel like it :P ;D
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Re: Strange!
« Reply #5 on: 26 January 2010, 13:56:40 »
Is it that time of the month?
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Re: Strange!
« Reply #6 on: 26 January 2010, 14:01:07 »
did you take the plugs out? Only time i had a miss-fire was when a plug destroyed itself, did as you describe, stop and start would be fine, but it then started mis-firing when on idle, then never stopped  ;D

When i took the plug out both electrodes were missing  :o

I'd see if one of the electrodes is about to fail....
« Last Edit: 26 January 2010, 14:01:37 by tunnie »
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cem_devecioglu

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Re: Strange!
« Reply #7 on: 26 January 2010, 17:27:55 »
similiar happened to me 2 years ago..

disconnected most of the  electrical sockets , cleaned the dirt, mud,oil etc , after no problem..
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Welung666

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Re: Strange!
« Reply #8 on: 26 January 2010, 19:52:09 »
Quote
similiar happened to me 2 years ago..

disconnected most of the  electrical sockets , cleaned the dirt, mud,oil etc , after no problem..

If you knew AA's car you'd know it doesn't have any of those anywhere near it ;D ;D
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Re: Strange!
« Reply #9 on: 26 January 2010, 20:14:35 »
Quote
did you take the plugs out? Only time i had a miss-fire was when a plug destroyed itself, did as you describe, stop and start would be fine, but it then started mis-firing when on idle, then never stopped  ;D

When i took the plug out both electrodes were missing  :o

I'd see if one of the electrodes is about to fail....

Yep. Well worth checking the plugs just in case.

Kevin
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Re: Strange!
« Reply #10 on: 27 January 2010, 07:04:50 »
Quote
Quote
did you take the plugs out? Only time i had a miss-fire was when a plug destroyed itself, did as you describe, stop and start would be fine, but it then started mis-firing when on idle, then never stopped  ;D

When i took the plug out both electrodes were missing  :o

I'd see if one of the electrodes is about to fail....

Yep. Well worth checking the plugs just in case.

Kevin

Plugs are only about 6 months old, 3K, but will check.
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Kevin Wood

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Re: Strange!
« Reply #11 on: 27 January 2010, 09:32:26 »
Quote
Plugs are only about 6 months old, 3K, but will check.

Highly unlikely unless you've got a dud, I'd say.

I would also try wiggling the connections to the coil pack and injectors while it's running, just in case something's loose, although I would expect the ECU to have stored an additional code if anything went open-circuit.

Strange, as you say. An aptly named thread. ;)

Kevin
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Re: Strange!
« Reply #12 on: 27 January 2010, 10:05:56 »
Whats the history on your coil pack, can't remember if you changed it? Take that out and take a look, mine had burn marks on it  :o i decided to replace it.
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Re: Strange!
« Reply #13 on: 29 January 2010, 08:11:04 »
Quote
Whats the history on your coil pack, can't remember if you changed it? Take that out and take a look, mine had burn marks on it  :o i decided to replace it.

Plugs 'look' fine.

Coil pack also 'looks' fine.

Hasn't missed a beat since.

Only code that came up was the missfire one.
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