|
|
SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS! |
Post Reply |
|
Thread Tools | Search this Thread |
12-18-2018, 09:51 AM | #1 |
Private First Class
31
Rep 135
Posts |
Z4M Weak Start
Hey All -
I've had the Z napping for the past few weeks while the weather was a little slick. I didn't do any storage prep, other than a full tank with some Sta-bil, just in case it rested for longer than a few weeks. Anyway, when I turned the key over the start was pretty weak and labored. Once it fired up the clock had been reset. Is this battery related? Should I have the battery disconnected, trickle charger, etc., or is this indicative of anything else? Thanks! -Mike
__________________
CURRENT: '07 Z4 M Coupe /// ‘01 911 C4 Cab
SOLD: '06 330i / '07 335i / '07 X5 4.8 / '13 335i |
12-18-2018, 09:56 AM | #2 |
Colonel
1226
Rep 2,935
Posts
Drives: Anything
Join Date: Apr 2010
Location: SoCal
|
Sounds like it. I think you already know the answer, but if you don't plan on driving it for a while, then have the battery disconnected. Otherwise, just keep it trickle charge.
|
Appreciate
0
|
12-18-2018, 09:59 AM | #3 |
Midlife Crises Racing Silent but Deadly Class
1827
Rep 5,337
Posts
Drives: 2006 MZ4C, 2021 Tesla Model 3
Join Date: Oct 2007
Location: Welcome to Jamaica have a nice day
|
If it was on a trickle charger, and clock and a variety of settings reset during the hard crank, it's time (IMO) to replace the battery. It's not supplying enough cold crank power to turn over and the resulting voltage drop reset the clock.
My MZ4 Coupe is 12 years old, on its 2nd battery going on about 7 years now. It gets cranked once every week for some joy rides now, or if my wife's diesel is blocking the Corvette (JFC I've gone FULL redneck now). I leave it on a CTEK overnight once a week, and it cranks over fine, but that first crank in the morning always cranks a little harder. There's been a few times when I didn't leave it on a trickle charger, and after about 4-5 days the car would have very similar symptoms. Very hard and long first crank, and afterwards the windows (auto up and down), clock, trip, and a variety of stored information reset. I figure 7 years on an AGM is pretty much pushing my luck and will probably replace sometime next year. Your case seems worse, that the battery has just enough voltage to barely crank over when cold even on a trickle charger.
__________________
Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
|
Appreciate
1
abelgonzaleZ461.00 |
12-18-2018, 10:35 AM | #4 |
Private First Class
31
Rep 135
Posts |
Sorry if it wasn't clear - it was not on a trickle charger.
Thanks for the replies!
__________________
CURRENT: '07 Z4 M Coupe /// ‘01 911 C4 Cab
SOLD: '06 330i / '07 335i / '07 X5 4.8 / '13 335i |
Appreciate
0
|
12-18-2018, 11:49 AM | #5 |
your average JAMF
3415
Rep 4,157
Posts
Drives: '21 M2 Comp, '19 Golf R
Join Date: Oct 2005
Location: Cochise County, AZ
|
Put it on a Battery Tender. I'm surprised it turns over at all after "a few weeks" this time of year.
__________________
'21 M2 Comp
'19 Golf R |
Appreciate
0
|
12-18-2018, 07:37 PM | #6 |
Captain
291
Rep 685
Posts |
The Z4m sends out a bluetooth signal if the doors arent locked. Even then shes got to be on a maintenance charger or the battery depletes after a few weeks. It seems to have a higher standby draw than my other bimmer.
|
Appreciate
1
abelgonzaleZ461.00 |
12-18-2018, 11:02 PM | #7 |
your average JAMF
3415
Rep 4,157
Posts
Drives: '21 M2 Comp, '19 Golf R
Join Date: Oct 2005
Location: Cochise County, AZ
|
No, it doesn't. Non-Premium Package cars don't even have Bluetooth. Where did you get that idea??
__________________
'21 M2 Comp
'19 Golf R |
Appreciate
0
|
12-18-2018, 11:32 PM | #8 |
My other car is on Mars
639
Rep 3,124
Posts |
^WHS, or at least, it's not supposed to.
My phone disconnects as soon as I turn the car off, long before I lock the doors. But one day last week after I shut the car off the white lights in the speedo and tach were still on. Turned it on/off and they went out. No telling what the car may forget to turn off.
__________________
Warning: May contain traces of nuts.
|
Appreciate
0
|
12-19-2018, 07:21 PM | #9 |
Captain
291
Rep 685
Posts |
Yes- it was posted on this forum a couple years back that some owners had trouble with radio/bluetooth failure to disconnect which ran the battery down from parasitic drain.
|
Appreciate
0
|
12-20-2018, 09:36 PM | #10 |
Lieutenant Colonel
1226
Rep 1,584
Posts |
Were the doors locked or unlocked during its slumber. On my original factory battery, I stored it every winter w/o starting it or having it on a trickle charger for the first 5-6 years and it started like a champ in the spring. Some others had similar experiences whereas others did not. The only possible common thread might have been the former folks leaving the doors locked vs the latter not.
That said, I do keep it on a trickle charger now. I have only had an issue starting the car if my phone was plugged in the charger prior to starting the car...which is still weird to me.
__________________
- Jeff
bosstones' flickr |
Appreciate
0
|
12-21-2018, 10:50 AM | #11 | |
Private First Class
31
Rep 135
Posts |
Quote:
__________________
CURRENT: '07 Z4 M Coupe /// ‘01 911 C4 Cab
SOLD: '06 330i / '07 335i / '07 X5 4.8 / '13 335i |
|
Appreciate
0
|
01-11-2019, 09:12 AM | #12 |
Private First Class
31
Rep 135
Posts |
If I just disconnect the positive and negative battery terminals in the trunk, do I need to remove the battery or can just leave the battery in place and make sure the terminals can't come in contact with the battery?
Or, should I be removing the battery and placing it on a trickle charger elsewhere? Just want to make sure I don't have issues with firing it up if it ends up sitting for a few weeks again. It's in a shared garage at a condo, so running a cord across the floor for the trickle charger isn't as easy as if it was in my own garage.
__________________
CURRENT: '07 Z4 M Coupe /// ‘01 911 C4 Cab
SOLD: '06 330i / '07 335i / '07 X5 4.8 / '13 335i |
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|