Logie1912

Ok so my alternator went in my 2001 c200 komp put new mb alternator in and car has no power at all now can't get car over 30mph any ideas

LMSND

Need More Information.. Elaborate on what happened when your alt. went, and what happens when you hit 30mph?

Logie1912

Ok so think we found the problem O2 sensor must have went when alternator went took it out car has full power now apart from being loud due to hole where sensor went new one ordered so hopefully that's all that was causing the problem

Logie1912

So my car has no revs scanner showed bank1 02sensor took it out full revs bought new sensor installed and no revs again top speed is 10mph

mike278

sounds like you may have a bad catalyst. The hole in the exhaust that you created by taking out the O2 sensor allows the engine to breathe a bit more. Check it with a back pressure gauge.

Logie1912

Car has no cat in it cut out