HELP ! clio sport 172 compression

[sanadatamna]

hello guys,
first time posting here,i am looking for help.
i have a clio 172 2001 and it has been misfiring in a strange way..
when i unplug injector num 3 it doesn't change anything while other injectors works well ( when i unplug,engine almost dies).
compression showed 200 on every one but on the 3rd plug (right to left) its about 70.
there is spark on both sides and on the 4 cables.
can someone help me ?
thank you.

 

[Dan@SJM]

You've answered your own question. Leak down test next to see where it's loosing it from.

 

[sanadatamna]

i've changed gaskets and everything,what could it be ?rings?

 

[Dan@SJM]

Rings, piston ring land, valve, seat, cracked head, cracked bore, crap gasket.

 

[bloke]

check the injector and resistance on the injector, could just be low compression due to bore wash from dicky injector.

 

[sanadatamna]

head is ok,i'm checking rings now
what do you mean dicky injector ?i've took them out and started the car,they are working properly.
thank you.

 

[bloke]

If one is leaking you can get bore wash and lose compression easily. As Dan says though leakdown test will tell you what's what.

 

[Laine_16v]

Does the engine breath a lot of oil or smell bad when you boot it?

 

[sanadatamna]

no,a bit of gas smell though