Hesitation, power loss no error code

[rnbguy]

Hi All

My n63 motor is experiencing slight hesitation on acceleration and have noticed a huge loss of power . Idle is fine.

I've scanned the car with obd and the torque app and see no error codes .

Any thoughts would be great??

[Crazy1323]

Originally Posted by rnbguy

Hi All

My n63 motor is experiencing slight hesitation on acceleration and have noticed a huge loss of power . Idle is fine.

I've scanned the car with obd and the torque app and see no error codes .

Any thoughts would be great??

Could be a boost leak. Do you have something that you can use to measure boost?

[rnbguy]

Thanks I've felt it could be that too, I have obd and torque app. But from what I read it can only read one sensor which measure only up to 3psi.

[omgboost]

Torque app doesn't read BMW specific codes. iCarly works but it is expensive.

[rnbguy]

I ran icarly, 0 errors also.

[RustyX5M]

I've had similar symptoms for awhile now... Brought it in to have it looked at 3 separate times at 2 different shops.
Originally was a vacuum leak with no fault codes... Fixed that. Then symptoms seemed to come back after a week or two. Brought it back into the Indy shop and they scratched their heads saying nothing was wrong. Wasn't satisfied with that answer so I brought it to the dealer to hopefully get a different opinion or answer.... Nothing from them either. About a week after car goes into limp (low power mode) and throws a code for water pump short circuit. After cycling the car in/off its back to "normal" power...Call the dealer and all they say is water pump is toast and to bring it in to have it replaced for $1500 (lol) (with no actual diag other than my own). So here I am in your boat...
So I'd recommend vacuum and pressure testing it to start then go from there...

Edit: vacuum leak would probably give a poor idle though.