Leon 1.6 Misfire

Honest John Back Room » Technical matters
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Mon 10 Apr 2006 01:30
Leon 1.6 Misfire - Woody
Despite a recent service, my petrol Leon 1.6 is misfiring under heavy load.

For example, coming off a roundabout in 3rd or taking a sharp left hand turn on a slight gradient, the engine is missing until reaching 2000 revs.

It hasn't done this before, driving in similar style.

What is the most likely fault?
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Mon 10 Apr 2006 19:49
Leon 1.6 Misfire - sedanman32
possibly a fouled plug or u/s plug lead or a too cool a plug. May even be a low grade of petrol. Maybe even ignition timing fault.

:-)
Steve...
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Tue 11 Apr 2006 15:57
Leon 1.6 Misfire - Woody
Got this sorted by a friendly mechanic today. It was a rogue spark plug. Replaced all four at the grand cost of £10.76 which was good news because new HT leads are £60.

VW/Seat have reduced the gap on the triple pin plugs from 1.1 mm to 1 mm. Runs like a dream again now.

Apart from when my wife had a Freelander, which used to break down every third lamp post, it is my first misfiring incident with a car for many many years.

On the mechanic's drive was a vehicle awaiting a new head gasket - a 1.8 Freelander!


Woody
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Tue 11 Apr 2006 19:57
Leon 1.6 Misfire - Dynamic Dave
VW/Seat have reduced the gap on the triple pin plugs from 1.1 mm to 1 mm.


I thought these were pre-set and shouldn't be adjusted? Or is it that they are a newer design and have a smaller gap which was already pre-set?
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