Rough Idle
11-25-2009, 08:30 AM
#11
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Here's what I did....clean the MAF, put Chevron Techron into a 3/4 full tank of gas, warm up the engine, then drive the hell out of the car. Keep the RPM's high and give it as much throttle as you can. Highway works best for this. I did this a second time and after that the engine was smoooooth. Most likely you just need
to get rid of the carbon build up in the engine. Techron combined with high RPMs will get the job done
to get rid of the carbon build up in the engine. Techron combined with high RPMs will get the job done
11-25-2009, 08:33 AM
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My Ride: 2005 BMW 545i Sport Package, Jet Black
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Originally Posted by Krozi' post='1062492' date='Nov 25 2009, 01:30 PM
Here's what I did....clean the MAF, put Chevron Techron into a 3/4 full tank of gas, warm up the engine, then drive the hell out of the car. Keep the RPM's high and give it as much throttle as you can. Highway works best for this. I did this a second time and after that the engine was smoooooth. Most likely you just need
to get rid of the carbon build up in the engine. Techron combined with high RPMs will get the job done
to get rid of the carbon build up in the engine. Techron combined with high RPMs will get the job done
I cleaned MAF too. Did not notice the difference myself but I know many people recommend it so it worth trying for sure
11-25-2009, 09:07 AM
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Originally Posted by Migo' post='1062367' date='Nov 25 2009, 08:14 AM
Hey guys, been great so far here. I noticed when my car idles at a stop sign or red light, I'm getting really rough idles. Now I've never encountered a stall or rough start in the morning. But I figured for the reputation of a BMW this vibration shouldn't be happening. Just to clean things up. No warranty remaining and just picked up the car last week. I've read in other forums that changing the idle level has fixed this, and others saying to throw some top notch premium gasoline in and run it for a bit.
What are you thoughts or experiences?
Thanks
What are you thoughts or experiences?
Thanks
I had a rough idle on my 545, i removed the charcoal filter which sits on top of your air filter ...and she's smooth as silk!
11-25-2009, 10:17 AM
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Originally Posted by 6825786' post='1062521' date='Nov 25 2009, 01:07 PM
I had a rough idle on my 545, i removed the charcoal filter which sits on top of your air filter ...and she's smooth as silk!
Wow thanks guys for all the help. I will try these all out. I just threw a bottle in and filled her up with 91 octane.
I will try this after another 2 tanks and give the air filter a try too.....Lets not forget to give her a hard ride!! lets see if this will clean her out!!
11-25-2009, 03:26 PM
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Weren't you using 91 Octane already?
Anything less can retard timing and could eventually cause your problems.
91 or more all the way.
Anything less can retard timing and could eventually cause your problems.
91 or more all the way.
11-25-2009, 03:31 PM
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Originally Posted by Gilgorm' post='1062778' date='Nov 25 2009, 07:26 PM
Weren't you using 91 Octane already?
Anything less can retard timing and could eventually cause your problems.
91 or more all the way.
Anything less can retard timing and could eventually cause your problems.
91 or more all the way.
11-25-2009, 10:06 PM
#17
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Originally Posted by Gilgorm' post='1062778' date='Nov 25 2009, 07:26 PM
Weren't you using 91 Octane already?
Anything less can retard timing and could eventually cause your problems.
91 or more all the way.
Anything less can retard timing and could eventually cause your problems.
91 or more all the way.
Any thoughts?
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