Taking longer than usual to crank up.

ryanchua · 01-14-2011, 01:43 AM

Hi all,

This is the first time I'm experiencing this on a car.

My car is taking longer than usual to crank up (takes i guess a perceived 1 to 1.5 second longer to crank up). My battery is fine (i have a meter at normal levels) and replaced about 6 months back.

Is there anyone else who's experienced this? What other potential issues might there be? Thanks in advance.

Thisisdudewhoru · 01-14-2011, 01:58 AM

How often do you start/drive your car. If it's not often, you probably need to turn the car to acc and let the fuel pump prime. I notice that if I don't start it every 3-4 days, it takes a long time to crank and the rpms will dip heavily under startup and then be fine.

ryanchua · 01-14-2011, 03:35 AM

I drive it everyday - just did another search on the forums and found some answers but are similiar to yours. I'll try your method later!

inTgr8r · 01-14-2011, 08:18 AM

This is a fairly common issue.
They may be hard to find, but there are other posts about this.

The general consensus is that it's fuel related.
Some get this when using a particular brand of gas.

NU arty boy · 03-05-2011, 12:47 AM

I had the same thing happen with my coupe. Dealership ended up replacing the crank position sensor. I hope this helps!

tman53 · 03-06-2011, 01:09 PM

I had this problem when I owned my Z3M. The consensus from the forums seemed to be that this was a normal occurence. Not sure it applies to the Z4M, as I have not experienced it with mine. At least not yet.

01-14-2011, 01:43 AM	#1
ryanchua Z4MC Sapphire Black Drives: BMW Z4M Coupe Join Date: Feb 2008 Location: Singapore Posts: 174 iTrader: (2)	Taking longer than usual to crank up. Hi all, This is the first time I'm experiencing this on a car. My car is taking longer than usual to crank up (takes i guess a perceived 1 to 1.5 second longer to crank up). My battery is fine (i have a meter at normal levels) and replaced about 6 months back. Is there anyone else who's experienced this? What other potential issues might there be? Thanks in advance. __________________ Brembo GT Monoblock 6/4pot setup with slotted rotors \| 18" OZ Ultraleggera w/ Michelin PS2s \| KKS Performance Klappenauspuffanlagen Exhaust\| Full CF Interior \| More toys to come BMW.SG - Singapore's Ultimate BMW Enthusiast Community
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01-14-2011, 01:58 AM	#2
Thisisdudewhoru Lieutenant Drives: Z4Mc Join Date: Mar 2010 Location: Bristol, TN Posts: 452 iTrader: (1)	How often do you start/drive your car. If it's not often, you probably need to turn the car to acc and let the fuel pump prime. I notice that if I don't start it every 3-4 days, it takes a long time to crank and the rpms will dip heavily under startup and then be fine. __________________

01-14-2011, 03:35 AM	#3
ryanchua Z4MC Sapphire Black Drives: BMW Z4M Coupe Join Date: Feb 2008 Location: Singapore Posts: 174 iTrader: (2)	I drive it everyday - just did another search on the forums and found some answers but are similiar to yours. I'll try your method later! __________________ Brembo GT Monoblock 6/4pot setup with slotted rotors \| 18" OZ Ultraleggera w/ Michelin PS2s \| KKS Performance Klappenauspuffanlagen Exhaust\| Full CF Interior \| More toys to come BMW.SG - Singapore's Ultimate BMW Enthusiast Community

01-14-2011, 08:18 AM	#4
inTgr8r Major General Drives: 07 M Coupe Join Date: Mar 2006 Location: Toronto Posts: 7,123 iTrader: (6)	This is a fairly common issue. They may be hard to find, but there are other posts about this. The general consensus is that it's fuel related. Some get this when using a particular brand of gas. __________________ Alpinweiss '07 M Coupe •Eisenmann Sport-Ceramic Black•Diablo-X•Fabspeed Headers•VRS Hyper-Narrow rear wing•Autosolutions SSK•APR splitter•Tekarbon headlights•StrongStrut STB•KW Clubsport•Poly FCAB/RTAB•Volk Racing G2•Direzza ZII•Stoptech BBK c/w Cool Carbon pads

03-05-2011, 12:47 AM	#5
NU arty boy Fuck it! We'll do it live!!! Drives: 2008 ///M Coupe, 2008 335i Join Date: Jan 2011 Location: Pinckney, Michigan Posts: 57 iTrader: (0) Garage List 2008 335i [4.00] 2008 Z4 M Coupe [3.75]	I had the same thing happen with my coupe. Dealership ended up replacing the crank position sensor. I hope this helps! __________________ 2008 ///M Coupe 2008 335i

03-06-2011, 01:09 PM	#6
tman53 New Member Drives: 2006 Interlagos M Coupe Join Date: Mar 2011 Location: USA Posts: 22 iTrader: (0)	I had this problem when I owned my Z3M. The consensus from the forums seemed to be that this was a normal occurence. Not sure it applies to the Z4M, as I have not experienced it with mine. At least not yet.

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