Renault Clio clio compression (psi)

you need to measure the cylinder compressions when the engine is cold ideally,they should be between 150 and 200 psi,if they are all the same then they are ok,have you checked the other things mentioned in your previous posts,are you getting fuel and spark?

yes getting spark gasket dont look good got head off and just had it skimed ! did compression test before and was thinking of putting new rings in but dont think i'll bother now cheers

if all of the compressions were ok then it can`t be mechanical problem,if you have spark,fuel and good compression it must be something like a sensor with intermittent fault,have you had the diagnostic tester hooked up and checking all the live data outputs when misfire present?

yes had it on computer first time said lamber sensor and missfire in pot one and four put new sensor on and found out injector was not working in pot one as for pot four thought it was a valve till got head off and noticed piston was clean as new because of coolent leaking in it
cheers

the coolant leaking into the cylinder is whats causing the misfire then,you say you had head skimmed,was it checked for cracks and leak tested?if the gasket looks knackered then it might be worth putting new gasket on and see if that sorts problem,depends if you have the time and money to do it

" if the gasket looks knackered then it might be worth putting new gasket on " No way in the world would any decent mechanic not replace gasket after removing head !!! There was nothing wrong with the cyl . compression readings . Are you sure the clean piston was not caused by unburnt fuel in cyl as it was not firing , thereby washing / cleaning bore , piston etc ? This is usual cause of this happening .

yeah any mechanic would put new gasket on,but its whether benito wants to spend time and money doing all that work on car for the same problem to be there afterwards,he might wanna cut his losses now and get rid of car

He has already stripped head off . It's only going to cost a head gasket to rebuild .If not , its virtually worthless lying in pieces with it's throat cut .