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MG MGF Technical - Missfire and high idle speed

Hi I own a 1999 MGF 1.8.
I have got a missfire that has just started today which gets worse under load.Also the idle has gone upto 1200revs any ideas please??
mf cole

coolant temperature sensor either brocken, or bad connections.

Almost... beside of other options
Dieter

Thanks Dieter
I will take a look when its drier.
Today it took ages to start,just turning over,but has since run fine,also the temp gauge works fine.
Is this seperate from the engine management sensor??
mf cole

The dashboard gauge is fed from a separate sensor, the blue or black one a couple of centimetres from the brown ECU coolant sensor. Which you probably discovered for yourself ;o) Both sensors suffer from age-related connection problems, so well worth cleaning up both sets of connectors while you're at it. Electrical contact spray (from Maplin etc) is well worth adding to your toolkit.
bandit

Thanks Bandit.
I've found the two sensors,they both looked fine as did the wiring.So i removed the dizzy cap and found that was well worn.So a new cap/rotor later all seems well.
mf cole

This thread was discussed between 19/10/2008 and 23/10/2008

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