Post #3
Have you noticed a pressure build up in the coolant sytem at all?
When my head gasket went it was blowing into the coolant system on 1 and 2 and pressurizing it, then when it was left the pressure was pushing moisture back into the cylinder causing a missfire from cold! The missfire would dissapear after the moisture had been f*cked of down the exhaust.
If it is this you can stop the missfire by bleeding the coolant system ie opening the coolant filler cap to allow all the pressure to disperse after a drive which worked for me.
When this happened to mine I didnt drop any power or have any custard in the collant sytem or oil!
Not saying it is this but it could be a possibility!
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Team Peugeot Sport 308 Gti�
Black T'99 Gti - may she rest in peace - written off in a shunt on the A329m