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-   -   My 540i/6 wont rev! (http://www.bimmerfest.com/forums/showthread.php?t=661753)

Kapten_sjovild 12-02-2012 11:49 AM

My 540i/6 wont rev!
 
Hello!

The problems continue with my 540i/6... All of a sudden he refuses to rev higher than 800-1200 rpm, no matter how far u press the pedal... Otherwise there are no other symptoms, except perhaps that I think it is ticking a little from this section:
http://imageshack.us/photo/my-images/832/bmwm62b44.jpg/

Any suggestions??


with best regards Adam

edjack 12-02-2012 01:13 PM

Okay, report the stored codes. We are not clairvioant.

I believe that device is the purge valve for the vapor recovery system, and I think it buzzes periodically. Mine doesn't have one like that.

JimLev 12-02-2012 05:14 PM

Yes, that is a purge valve for the charcoal canister that is above the left rear wheel liner.
It has nothing to do with why your engine won't rev.
Have you checked the ACS throttle body that is just past the MAF to see if it is fully open?

JasonSC540ia 12-03-2012 03:13 AM

What year is the 540? If its 99 or later its drive by wire and most likly the gas pedal part or the TB.

JimLev 12-03-2012 05:13 AM

Quote:

Originally Posted by JasonSC540ia (Post 7227804)
What year is the 540? If its 99 or later its drive by wire and most likly the gas pedal part or the TB.

Looking at the link he posted its not drive by wire, looks like a 98 to me.

JasonSC540ia 12-03-2012 05:41 AM

Quote:

Originally Posted by JimLev (Post 7227886)
Looking at the link he posted its not drive by wire, looks like a 98 to me.


Ahhhh. Sorry. I didnt notice the link.

Kapten_sjovild 12-03-2012 11:51 AM

Quote:

Originally Posted by edjack (Post 7226838)
Okay, report the stored codes. We are not clairvioant.

I believe that device is the purge valve for the vapor recovery system, and I think it buzzes periodically. Mine doesn't have one like that.

I dont have any codes at the moment. Alright then i exclude that it may cause a problem!

Quote:

Originally Posted by JimLev (Post 7227188)
Yes, that is a purge valve for the charcoal canister that is above the left rear wheel liner.
It has nothing to do with why your engine won't rev.
Have you checked the ACS throttle body that is just past the MAF to see if it is fully open?


The translate of "charcoal canister" doesent give any results for me. Is it possible to explain what it is or some other name? vapor recovery system?
I havenīt checked the ACS yet, ill do it tomorrow and report results!

Quote:

Originally Posted by JasonSC540ia (Post 7227804)
What year is the 540? If its 99 or later its drive by wire and most likly the gas pedal part or the TB.

It is an 1997.04

JimLev 12-03-2012 11:59 AM

The vapors are stored in the charcoal canister that is above the left rear wheel. The purge valve sucks the vapors out of this tank.

Back to the rev problem.
What happens if you operate the throttle linkage under the hood by hand? Have you tried that?
Also look at the traction control throttle body butterfly, it should be wide open.

Kapten_sjovild 12-03-2012 12:37 PM

Quote:

Originally Posted by JimLev (Post 7228565)
The vapors are stored in the charcoal canister that is above the left rear wheel. The purge valve sucks the vapors out of this tank.

Back to the rev problem.
What happens if you operate the throttle linkage under the hood by hand? Have you tried that?
Also look at the traction control throttle body butterfly, it should be wide open.

Ok!

Yep, it is the same as when pressing the pedal, so i guess that the problem isnt anywere between there.

You mean this part? http://imageshack.us/photo/my-images/28/bmwm62b44.jpg/
I havent checked that yet, i guess that is the second thing after unplug MAF sensor to do?

Kapten_sjovild 12-03-2012 01:07 PM

Quote:

Originally Posted by JimLev (Post 7228565)
The vapors are stored in the charcoal canister that is above the left rear wheel. The purge valve sucks the vapors out of this tank.

Back to the rev problem.
What happens if you operate the throttle linkage under the hood by hand? Have you tried that?
Also look at the traction control throttle body butterfly, it should be wide open.

Ok!

Yep, it is the same as when pressing the pedal, so i guess that the problem isnt anywere between there.

You mean this part? http://imageshack.us/photo/my-images/28/bmwm62b44.jpg/
I havent checked that yet, i guess that is the second thing after unplug MAF sensor to do?


(wops i pressed send again, im sorry, can i delete this post?)

JimLev 12-03-2012 08:14 PM

Yes, that part you just circled is the secondary throttle plate that is controlled by the ASC.
Will it rev to higher RPM's in neutral?

Kapten_sjovild 12-08-2012 05:11 AM

Quote:

Originally Posted by JimLev (Post 7229480)
Yes, that part you just circled is the secondary throttle plate that is controlled by the ASC.
Will it rev to higher RPM's in neutral?

loosened MAF sensor and sat back, and opened and operated the second throttle plate manually, now she runs like usually :):)


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