clio valver MISSFIRING..why?? !!!

[robwhite]

hey everyone. iv just bought a 1995 clio 1.8 16v with abit of a misfire. the problem is that the spark plug cavities keep filling with water and gettin the plugs and leads wet therefore makin it misfire. so i changed the rocker gasket thinkin it was that and replaced the plugs and leads. after one day of runnin perfect the misfire came back and the cavities were full again ! i was then told it is probly the two core plugs that are sat in between the spark plugs. ive just replaced them also and taken out for a test drive. it was ok for about 5 minutes and the misfire as came back worse than ever ! ive just pulled the plugs out to try for water and they are a little wet but nowhere near as bad as what they were before...but still the missfire. any ideas anyone??

thanks

rob

 

[MATT BLACK]

Water seeps into the airvent onto the rocker / plugs. Seal the airvent up.

Very common fault

 

[Bailey_1260]

does your bonnet vent have the rain catcher fitted?

could be any number of things but with the nice weather recently i dont think it will be the vent.

when does it misfire? at idle, mid revs... etc

 

[F479XRL]

PFC mag this month lists most common misfire as MAP sensor or throttle body iirc. Although you obviously have a water ingress problem so may not be as applicable.

 

[Bailey_1260]

MAP sensor, TPS, corroded core plugs, corroded dizzy/ht leads. so many things can cause a misfire on these cars.