Vibrations, RPM fluctuations when AC is on. Any Ideas
08-13-2012, 01:13 PM
#11
Senior Members
For the initial issue, It could be an electrical issue in the A/C compressor, first check the battery. Check refriderant levels too.
But thinking about it, your issues could be related. because if your put the AC on it puts load on the engine and your RPM's jump which they really shouldn't. So Thinking about that, the engine is demanding more for some reason when load is on and so If you fix the issue I'm sure these issues will go away. But then again it could be two separate issues.
But thinking about it, your issues could be related. because if your put the AC on it puts load on the engine and your RPM's jump which they really shouldn't. So Thinking about that, the engine is demanding more for some reason when load is on and so If you fix the issue I'm sure these issues will go away. But then again it could be two separate issues.
08-13-2012, 03:14 PM
#12
Contributors
Thread Starter
Join Date: Sep 2008
Location: Round Rock, TX
Posts: 407
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 05' 545i
Thanks for the insight Achtung.
Battery is fully charged now after trickle. I will check refriderant levels.
I agree, I had checked the DTML pump when the error first occurred, hoses were fine and connected, but the pump may have been gone anyways. I was planning on changing at some point, didnt think it would have had this effect though.
Hopefully they are interrelated. O2 error just came on as well...time for some work
Appreciate your help and will get back with cause and solution...hopefully.
Battery is fully charged now after trickle. I will check refriderant levels.
I agree, I had checked the DTML pump when the error first occurred, hoses were fine and connected, but the pump may have been gone anyways. I was planning on changing at some point, didnt think it would have had this effect though.
Hopefully they are interrelated. O2 error just came on as well...time for some work
Appreciate your help and will get back with cause and solution...hopefully.
For the initial issue, It could be an electrical issue in the A/C compressor, first check the battery. Check refriderant levels too.
But thinking about it, your issues could be related. because if your put the AC on it puts load on the engine and your RPM's jump which they really shouldn't. So Thinking about that, the engine is demanding more for some reason when load is on and so If you fix the issue I'm sure these issues will go away. But then again it could be two separate issues.
But thinking about it, your issues could be related. because if your put the AC on it puts load on the engine and your RPM's jump which they really shouldn't. So Thinking about that, the engine is demanding more for some reason when load is on and so If you fix the issue I'm sure these issues will go away. But then again it could be two separate issues.
08-27-2012, 09:33 AM
#14
Senior Members
Join Date: May 2010
Location: Bay Area, Cali.
Posts: 454
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 545i - GONE
Also, you may have a bad ignition coil. My car was hesitating, and the RPMs would drop at idle with the A/C on. Pulled engine information with GT1 and it pointed me to cylinder 3 misfiring. Checked the spark plug, looked fine, normal color (brown), so I replaced ignition coil and now engine is all fine.
08-27-2012, 11:21 AM
#15
Members
Join Date: Dec 2011
Location: Knoxville, TN
Posts: 103
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2005 545 6MT
Also, you may have a bad ignition coil. My car was hesitating, and the RPMs would drop at idle with the A/C on. Pulled engine information with GT1 and it pointed me to cylinder 3 misfiring. Checked the spark plug, looked fine, normal color (brown), so I replaced ignition coil and now engine is all fine.
Thread
Thread Starter
Forum
Replies
Last Post