Idle issues

rmousir · 04-26-2016, 10:27 AM

Hi Folks.

My car:
2006 BMW Z4, 3.0si convertible.

I have a surging issue. No check engine light, but surging at idle. worse when in drive than in neutral.

I've cleaned the MAF twice with MAF cleaner.

I have read the or scanned the car with my schwaben scanner and there is a code there. I clear the code and it returns but I can't figure out how to track down which sensor is causing the idle issue.

If anyone can provide some direction here I would be most greatful. I'm leaning towards changing out the MAF but I'd hate to just replace parts for nothing if that isn't what I need to do.

Thanks very much for any suggestions, comments, and ideas.

Richard.

rmousir · 04-26-2016, 11:59 AM

I read this on a forum regarding the idle issue....

Ok, fixed it! I took the ICV and cleaned it. However, I honestly believe it was the Throttle ECU. To reset insert key and turn to position 2 for 10 seconds, then off for 10 seconds then fire up the car. I didn't test them independently, but I'm leaning more toward the Throttle ECU needing a reset.

does this actually do anything? I'll give it a try since I don't see the harm. I didn't have any issues until the batter was dead and i pulled it out for a week while I waited for my new alternator. Could it just be a reset like what I posted?

Thanks.

StickMon · 04-26-2016, 07:22 PM

Quote:

Originally Posted by rmousir

... and there is a code there. ...

What is the code?

04-26-2016, 10:27 AM	#1
rmousir Private 3 Rep 65 Posts Drives: 2006 Z4 3.0si Join Date: May 2015 Location: Ohio iTrader: (0)	Idle issues Hi Folks. My car: 2006 BMW Z4, 3.0si convertible. I have a surging issue. No check engine light, but surging at idle. worse when in drive than in neutral. I've cleaned the MAF twice with MAF cleaner. I have read the or scanned the car with my schwaben scanner and there is a code there. I clear the code and it returns but I can't figure out how to track down which sensor is causing the idle issue. If anyone can provide some direction here I would be most greatful. I'm leaning towards changing out the MAF but I'd hate to just replace parts for nothing if that isn't what I need to do. Thanks very much for any suggestions, comments, and ideas. Richard.
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04-26-2016, 11:59 AM	#2
rmousir Private 3 Rep 65 Posts Drives: 2006 Z4 3.0si Join Date: May 2015 Location: Ohio iTrader: (0)	I read this on a forum regarding the idle issue.... Ok, fixed it! I took the ICV and cleaned it. However, I honestly believe it was the Throttle ECU. To reset insert key and turn to position 2 for 10 seconds, then off for 10 seconds then fire up the car. I didn't test them independently, but I'm leaning more toward the Throttle ECU needing a reset. does this actually do anything? I'll give it a try since I don't see the harm. I didn't have any issues until the batter was dead and i pulled it out for a week while I waited for my new alternator. Could it just be a reset like what I posted? Thanks.
	Appreciate 0 Quote