Duff Plugs - (and an aside on dodgy car speedo! lol)

[Lank]

[quote author=Lank link=topic=11510.msg124070#msg124070 date=1391074317]
[quote author=nick crisp link=topic=11510.msg123948#msg123948 date=1391025930]
[quote author=BBROWN1664 link=topic=11510.msg123939#msg123939 date=1391023168]
I serviced the wifes focus last year. Put new plugs in and it was running on 3 where as before it had been fine. Turned out to be a knackered coil pack that gave up the ghost due to the new plugs.

Aaaargh! Yes, Ford Focus 1.8! I hope coil packs aren't dear on these then.
BBROWN, your wife's car ever had any speedo problems?
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what year is your focus? I assume the speedo just drops to 0 and comes back now and again.


I had a 2002 and the common problem is the speed sensor on the gearbox. Annoying job as they normally snap off on the gearbox. The part is only £25 from ebay.


I had it replaced and was fine, my step father has the car now and had to fit a new gearbox, the speed sensor on that box had gone too.
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Well, it's on a 54 plate. Yes, the speedo drops to zero now and again, for a few seconds at a time. Also, the odometer light flickers now and again. Have been told that it's a common problem and can spread through the display like a cancer (!). Not a problem at the moment, as it is only for a few seconds at a time, but will be keeping an eye on it to see if it deteriorates.

Apparently, did have a dodgy plug, delivered back today, all ok so far. So hopefully won't need a coil pack, fingers crossed!
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There is the other problem of the dials failing and you need a replacement. If when the speedo drops of the car runs a bit lumpy on acceleration it will be the sensor, as the car thinks it is stationary. Mine would normally stall coming to a stop unless you blipped the throttle and also very lumpy and low revs