Hi. Not had my rs turbo long. Anyway decided to change the oil and filter. Refilled oil as ive done a million times. Started the car up and it sounds like a subaru! Very very badly misfiring. It ran fine b4 i changed the oil. Ive checked the injectors and they are spraying fuel. The fuel pump primes. The plug leads are new magnacor jobbies. The plugs are very black and sooty though and there a month old. Please help someone. Cant understand how changing the oil caused the cars poor running. Im on mfi engine.

 

Have you replaced the oil cap and dipstick correctly, sounds like air leak.

 

Hi. Ive had a poke about this morning and it wont even start now. Plugs are black and wet. When it started yesterday it was chucking black smoke out the exhaust. Ive checked oil cap and dipstick and there all sound. The oil i took out stunk of petrol and was very sticky. Like a glue type consistency? Could the previous owner have added an additive to mask a problem? Just weird how friday it ran like a good un and saturday it wont??