right then basicly the car runs and cyl 4 fires on and off when ever it wants to. it's a hcs with a carb so the engine is pretty simple however i took out the plug and cleaned the threads to make sure it was getting a good earth and then checked the plug was actually creating a spark by earthing it on a headbolt whilst the engine was running.

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To rebuild?

Coilpack?

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She's still alive! -23/02/2017

i dont think so, it does produce a spark

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To rebuild?

Oooer, not sure then. I would have said have you checked the injector but it's carb... so can't help you there mate sorry

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She's still alive! -23/02/2017

ty anyways, i am going to try gapping the plugs in the morning to see if that helps.

if i can find a feeler gauge

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To rebuild?

the coil pack could be about to give it best as its commen for no.4 to play up

cant remember on those engines but... valve clerences?

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fibre is my friend, more to come ;-) SI/T squirrel muncher

i may give the valve clearences ago anyway, but again i stll need to find a feeler gauge

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To rebuild?

dont think it would be valve clearences but it could be coil pack as its carbed have you cleaned it out and is the valves opening and closing ok.

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coilpack sounds promising i think or i am sticking with plugs as all the other cyls run fine so if there was a carb problem it would effect all of them as they all use the same fuel air mixture.

valves could be a possablity but if they were sticking then the engine wouldn't run/ turn

oh and it's been giing the odd splutter for months

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promlem sorted i stuck a new plug in today and now she runs perfectly. only problem is that when it was misfirng the engine was shaking about and one of the bolts that holds the downpipe to the centre section of the exhaust came loose and flew out on the road

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To rebuild?