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Author Topic: Exhaust emissions light on, and flashing!  (Read 1185 times)

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Mr Hagon

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Exhaust emissions light on, and flashing!
« on: 16 December 2010, 10:50:48 »
So I join a dual carriageway this morning, go to overtake and use sports mode.  Engine winds itself up and the emissions light goes on and then flashes  :'(.

At this point I then back off and the light is lit but not flashing.  Now the engine is running lumpy and unresponsive and idling badly.

What are the consequences, if any?  Will a pedal test show anything more?

Will this clear itself when I go home as the engine will have had time to cool down etc. or is it permanent, in which case do I need to "Consult a Vauxhall Dealership" as the manual advises...

(The car suffered from the pre-cat problem when I bought it and recon cats were fitted so never saw the light on since).
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Vauxhall Omega Elite 3.2 Estate (Mar '02) in Star Silver.

Marks DTM Calib

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Re: Exhaust emissions light on, and flashing!
« Reply #1 on: 16 December 2010, 10:54:04 »
Time to get the fault codes read (pedal trick)
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Mr Hagon

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Re: Exhaust emissions light on, and flashing!
« Reply #2 on: 16 December 2010, 13:28:24 »
Done the pedal trick, twice to be sure and here's what it said:

P0300 Random/multiple cylinder misfire detected
P0301 Cylinder 1 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0305 Cylinder 5 Misfire Detected

So, perhaps the car objected to me giving it some beans and the reason for rough running means it's in limp mode.

Haven't turned the engine over as yet, so what's the diagnosis?
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vauxfan2k

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Re: Exhaust emissions light on, and flashing!
« Reply #3 on: 16 December 2010, 13:32:42 »
missfire on 1,3 and 5 suggests the coil pack for that bank, check for oil in the plug wells, most likely if there is any its shorting the coil pack.
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Mr Hagon

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Re: Exhaust emissions light on, and flashing!
« Reply #4 on: 16 December 2010, 23:08:30 »
Looks like I might have got away with it.  No emissions light when I drove home tonight and no lumpy running...
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2woody

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Re: Exhaust emissions light on, and flashing!
« Reply #5 on: 16 December 2010, 23:13:25 »
maybe it was just a little vexed for some reason
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Mr Hagon

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Re: Exhaust emissions light on, and flashing!
« Reply #6 on: 16 December 2010, 23:25:55 »
Quote
maybe it was just a little vexed for some reason
I've not given it an Italian tune up for some time and it probably didn't like the combination of sports mode and 5k rpm at the same time  ;).
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skyblue

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Re: Exhaust emissions light on, and flashing!
« Reply #7 on: 17 December 2010, 00:09:50 »
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Looks like I might have got away with it.  No emissions light when I drove home tonight and no lumpy running...


Pleased you are now sorted, lets hope thats the end of it :y
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Kevin Wood

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Re: Exhaust emissions light on, and flashing!
« Reply #8 on: 17 December 2010, 10:03:12 »
Still worth a peek under the coil pack on that bank just in case it's filling up with oil, IMHO.

Kevin
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