car surges and hesitates on acceleration

[Docile 64]

e46 m43 318i.

had it scanned and came out with all sorts of misfiring. under full acceleration. car will not accelerate and stays at maximum around 4k rpm. under about 1/2- 3/4 throttle i can get rpm to 5k but when i press more it goes back down to 4k+-. idle is a tiny bit erratic as well.

mechanic and myself checked for vacuum leaks and none were found.

Could it be the TPS?

[*Glenn* 854]

Sounds like a blocked cat..... can check it for you

[euroriffic 603]

Did the scan not come up with a sensor error?

[Docile 64]

its my uncles car. he brought it to Bmworkshop to get scanned. car had a lot of errors logged so they said they can't accurately diagnose it then. check engine light goes on and off.

i scanned with my inpa a couple of hours ago and it showed lambda sensor fault.

Edited May 1, 2012 by Docile

[Docile 64]

can exhaust shops do tests on cats? any recommendations to which one? pref somewhere close. this car can barely run :/

[*Glenn* 854]

can exhaust shops do tests on cats? any recommendations to which one? pref somewhere close. this car can barely run :/

Remove pre cat oxygen sensor and drive it. Will make a bit of noise and dont drive it too far. The exhaust will be hitting the chassis rail.