exhaust question

[oksana]

when the exhaust was throwing out black smoke the mechanic said it is the EGR sensor and needs a replacement which i did and there no change after that then he said it take 5 to a weeks time to come back to normal and now after 8 days he had to go for emergency leave and now i dont know what to do

can someone help.

please

[kareemhy]

Black smoke can be there for various reason

Faulty EGR, faulty MAF, piston ring leaking oil and oil getting burnt in engine, bad timing (tune up). Better get OBD test and see if MAF is fine or not first. If its fine then second big thing is piston ring.

If loosing engine oil level in days then that confirm that oil is getting burnt in engine (if car is not leaking).

[oksana]

thank you