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focus 1.8 misfire problem

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Old 22-08-2010, 05:44 PM
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jasonnjane
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Default focus 1.8 misfire problem

just got this focus last week and it has just developed a mis fire...

took plug leeds off and the spark plug holes were full of water and tried that once cleaned water out and i got a right smell of burning plastic...stopped and the lamba sensor wires had touched the manifold and shorted together...seperated then and insulated them and it still miss fires...

any ideas anyone?

Last edited by jasonnjane; 22-08-2010 at 06:28 PM.
Old 22-08-2010, 05:48 PM
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oldford
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Fuse blown for the Oxygen sensor heater?
Where's the water coming from?
Old 22-08-2010, 05:51 PM
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Oxygen sensor heater...where would i find that fuse location?

water was from me giving it a clean...yard at work so dusty.
Old 22-08-2010, 06:12 PM
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where would i find that fuse location?
Old 22-08-2010, 06:45 PM
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Fuse 18 (10A Engine Compartment)

Martin
Old 22-08-2010, 07:13 PM
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jasonnjane
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well fuse was blown...thanks martin...but still has the mis fire...

once it gets revving its ok,just low revs it has naff all power.
Old 22-08-2010, 07:43 PM
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also i unplugged the lamba sensor plug while engine running and it made no difference so i'm now wondering if the lamba sensor is goosed.

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Old 22-08-2010, 07:47 PM
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oldford
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Probably. Have the live data read by someone with the right equipment.
But could also be some water left in one or more connectors.
Old 22-08-2010, 07:49 PM
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the water was in the holes for the spark plugs and is all dry now.thing is i am off to work in it in morning...got a 3 hour journey to get there too..hate working at different depots!
Old 22-08-2010, 08:24 PM
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martysmartie
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More than likely either that or the wiring has a break where it melted, the lamba are common for problems though so it may be worth replacing.

Martin
Old 22-08-2010, 08:31 PM
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jasonnjane
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wires looked ok.still copper colour and looks like i will have to replace lamba sensor in morning...gonna be late for work but what can i do!
Old 22-08-2010, 09:02 PM
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They can be extremely tight due to the heat, patience is a virtue

Martin
Old 27-08-2010, 08:32 PM
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jasonnjane
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well sorted problem...was coil pack and wires on lamba sensor were ok and just both happened at same time..

cars running fine now...

its for sale too lol
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