Hi i have a clio mk2 1.4 16v and for ages now it will cut out while im driving and the engine becomes very lumpy to drive. also now everytime i start it it will cut out as soon as i tap the throttle, i have to put my foot down very slowly to keep it running and it sounds like it wants to backfire and it chucks out a load a black stuff out of the exhaust all over the floor? taken it too garages countless times now and no one seems to know what it is so if anyone has any ideas it would be great to hear from you.
Cheers.
Cheers.