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Author Topic: Running Rich 3.0 V6  (Read 926 times)

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tmx

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Running Rich 3.0 V6
« on: 14 October 2008, 16:31:43 »
i done the sparkplugs this morning and have noticed my engine is running very rich what is likely to be the cause of this?

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Bandit127

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Re: Running Rich 3.0 V6
« Reply #1 on: 14 October 2008, 17:46:09 »
Did you have black or wet plugs then?

Is your engine management light on?
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iainb

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Re: Running Rich 3.0 V6
« Reply #2 on: 14 October 2008, 19:09:41 »
Check for codes.
Have look at the air filter, if its blocked change it.
Get some carb cleaner and give the maf sensor a good spraying and then do the breathers ;)
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tmx

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Re: Running Rich 3.0 V6
« Reply #3 on: 14 October 2008, 20:04:01 »
plugs were totally dry done the breathers and cam gaskets when i first bought the car in january 08

they were black tipped no codes atm but now and again it flags up a MAF low voltage code

air filter is a pipercross non oiled panel filter

thanks for the advice ian will try that at the w.e :y
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woodsy_mv6

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Re: Running Rich 3.0 V6
« Reply #4 on: 14 October 2008, 20:15:09 »
Quote
plugs were totally dry......
.....they were black tipped
Sounds more like you're running lean to me.

When you say you have notice it is running rich, were do you feel you're losing power??
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tmx

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Re: Running Rich 3.0 V6
« Reply #5 on: 14 October 2008, 20:27:45 »
Haynes manuals spark plug comparisons myn looks the same as the rich ones

i have only just changed the plugs at 120k last time they were changed was at 80k in 2004 by Inchape Vauxhall Exeter
« Last Edit: 14 October 2008, 20:28:08 by tmx »
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Kevin Wood

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Re: Running Rich 3.0 V6
« Reply #6 on: 14 October 2008, 20:36:14 »
Spark plugs really don't provide a reliable indication of mixture these days. Since the advent of unleaded fuel the deposits that used to give them their "colour" don't occur.

It's normal for plugs to come out of a modern engine looking black and sooty if it has recently been running cold, or idling for a long period. After high speed / heavy load running they go white and appear totally clean. This is more a symptom of the recent operating temperature of the plug than anything else.

I would say if the engine is running well, and gets up to, and maintains, the correct coolant temperature the likelihood is that nothing is wrong.

Kevin
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woodsy_mv6

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Re: Running Rich 3.0 V6
« Reply #7 on: 14 October 2008, 20:46:18 »
Based on the Haynes book of lies........as shown on Champion plugs :-/

If you're that worried about it mate, get a diagnostic probe up the exhaust to check the mix throughout the rev-range ;)
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