Thoughts on what's going on...

NYZ4 · 07-24-2012, 09:30 PM

Maybe someone can help me with this? When I let my foot off the gas of my automatic z4 and I'm just rolling to a red light for example I can sometimes feel the car surge forward or back. It's like little jolts as if i were pressing the brake just a tiny bit. Anyone have any idea what this could be? Thank You.

XMetal · 07-25-2012, 12:23 AM

Are you driving in sport mode? Could be the transmission downshifting

NYZ4 · 07-25-2012, 12:32 AM

No I don't have sport mode

Mueller944s2 · 07-25-2012, 12:36 AM

Possibly the torque converter. Also check the tranny. That's all I got.

And you probably have sport mode. I think if you move the gear shifter to the left? That holds it a gear lower, and does a bunch of other things that supposedly make it faster

NYZ4 · 07-25-2012, 10:54 PM

Thanks Mueller, I'll have to check that out.

psygnosis · 07-27-2012, 08:28 PM

Quote:

Originally Posted by Mueller944s2

Possibly the torque converter. Also check the tranny. That's all I got.

And you probably have sport mode. I think if you move the gear shifter to the left? That holds it a gear lower, and does a bunch of other things that supposedly make it faster

Just transmission things. Not the throttle or the steering change of the sport button.

07-24-2012, 09:30 PM	#1
NYZ4 Private First Class 17 Rep 141 Posts Drives: 2007 BSM BMW Z4 Join Date: Sep 2011 Location: NY iTrader: (0)	Maybe someone can help me with this? When I let my foot off the gas of my automatic z4 and I'm just rolling to a red light for example I can sometimes feel the car surge forward or back. It's like little jolts as if i were pressing the brake just a tiny bit. Anyone have any idea what this could be? Thank You.
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07-25-2012, 12:23 AM	#2
XMetal Colonel 1133 Rep 2,866 Posts Drives: Anything Join Date: Apr 2010 Location: SoCal iTrader: (0) Garage List 2008 Z4M Coupe [10.00] 2018 Audi S3 [0.00] 2004 X5 [8.50]	Are you driving in sport mode? Could be the transmission downshifting
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07-25-2012, 12:32 AM	#3
NYZ4 Private First Class 17 Rep 141 Posts Drives: 2007 BSM BMW Z4 Join Date: Sep 2011 Location: NY iTrader: (0)	No I don't have sport mode __________________ 2007 BMW Z4 3.0i. Supersprint powerloop exhaust and center pipe, Aero bumper (w/ clear bra) and side skirts, Avant Garde 19 inch M310's, Koni shocks, Eibach springs, Tekarbon carbon fiber side mirrors.
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07-25-2012, 12:36 AM	#4
Mueller944s2 Private 6 Rep 98 Posts Drives: '90 Porsche 941, Z4 Roadster Join Date: Jul 2012 Location: New Orleans, Louisiana iTrader: (0)	Possibly the torque converter. Also check the tranny. That's all I got. And you probably have sport mode. I think if you move the gear shifter to the left? That holds it a gear lower, and does a bunch of other things that supposedly make it faster
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07-25-2012, 10:54 PM	#5
NYZ4 Private First Class 17 Rep 141 Posts Drives: 2007 BSM BMW Z4 Join Date: Sep 2011 Location: NY iTrader: (0)	Thanks Mueller, I'll have to check that out. __________________ 2007 BMW Z4 3.0i. Supersprint powerloop exhaust and center pipe, Aero bumper (w/ clear bra) and side skirts, Avant Garde 19 inch M310's, Koni shocks, Eibach springs, Tekarbon carbon fiber side mirrors.
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