ZPOST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   ZPOST > BMW Z4 Technical Talk > Engine, Exhaust, Drivetrain Modifications
  TireRack

SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
Post Reply
 
Thread Tools Search this Thread
      11-29-2012, 06:36 AM   #1
pyo
Lieutenant
United_States
531
Rep
531
Posts

Drives: 2022 X3MC
Join Date: Feb 2012
Location: Fairfax, VA

iTrader: (1)

Garage List
Engine Problems: EML, Brake & DSC lights on

Last week while leaving the grocery store, I was shifting from 1st to 2nd gear when out of no where the EML light, brake light and DSC light came on. The engine RPM's kept oscillating from 700-1200rpm with the car out of gear and clutch disengaged. The car cannot be driven as I cannot get a steady acceleration. I was able to restart the car and the issue fixed itself.

My buddy with all the proper cables and software, hooked up to my OBDII however there were no codes stored in the database.

2 nights ago, a buddy helped me clean the ICV, DISA and Throttle body. It was a little dirty but not too bad. After cleaning it felt like the car was a little smoother.

This morning about 30 minutes into my drive into work (mostly highway until I get local), i was going about 30mph in 4th gear when it happened again. Same symptoms as before and could not be driven. I was in traffic and there was no where to pull over, so while rolling down the road I restarted the car and the issue yet again fixed itself.

Does anyone know what the issue could be? Since this occurs randomly and throws no codes, I haven't taken it to a shop yet.
__________________
'00 328i // Sold
'04 Z4 3.0i // Sold
'22 X3MC LCI

Last edited by pyo; 11-29-2012 at 06:37 AM.. Reason: changed title to reflect post
Appreciate 0
      11-29-2012, 11:30 AM   #2
Finnegan
Dog Listener
Finnegan's Avatar
United_States
701
Rep
7,850
Posts

Drives: Z4M/. Z3M, E36/46 M3
Join Date: Oct 2008
Location: Teaching the dog to slalom

iTrader: (22)

Original battery? Even it not, I'd start there.

Check the connections for tightness/corrosion. Get the battery checked.

This is common problem with the battery, easiest to test for, and a quick fix if it is battery related.
Appreciate 0
      11-29-2012, 12:09 PM   #3
pyo
Lieutenant
United_States
531
Rep
531
Posts

Drives: 2022 X3MC
Join Date: Feb 2012
Location: Fairfax, VA

iTrader: (1)

Garage List
Quote:
Originally Posted by Finnegan View Post
Original battery? Even it not, I'd start there.

Check the connections for tightness/corrosion. Get the battery checked.

This is common problem with the battery, easiest to test for, and a quick fix if it is battery related.
Just changed battery couple months ago with one from sears. Ill check the connections after work. Should I get battery tested at autozone? She starts up without hesitation on a cold start (car is parked outside condo).

Also read it could be MAF. Really hope that is not the case.
__________________
'00 328i // Sold
'04 Z4 3.0i // Sold
'22 X3MC LCI
Appreciate 0
      11-29-2012, 12:44 PM   #4
Finnegan
Dog Listener
Finnegan's Avatar
United_States
701
Rep
7,850
Posts

Drives: Z4M/. Z3M, E36/46 M3
Join Date: Oct 2008
Location: Teaching the dog to slalom

iTrader: (22)

Quote:
Originally Posted by pyo View Post
Just changed battery couple months ago with one from sears. Ill check the connections after work. Should I get battery tested at autozone? She starts up without hesitation on a cold start (car is parked outside condo).

Also read it could be MAF. Really hope that is not the case.
Unlikely it's the battery if it's new. Just offering that as the symptoms described could be caused by it. I'd still rule it out.

Otherwise, could be the MAF as you said, or a throttle position sensor.

I'd also try to code reader again. Your buddy's reader isn't just generic ODBII, right, it's a full BMW scanner (like Bavarian Technic, P.A. Soft, etc.), correct? Not all codes that are BMW specific are read by all readers.
Appreciate 0
      11-29-2012, 02:30 PM   #5
pyo
Lieutenant
United_States
531
Rep
531
Posts

Drives: 2022 X3MC
Join Date: Feb 2012
Location: Fairfax, VA

iTrader: (1)

Garage List
Quote:
Originally Posted by Finnegan View Post
Unlikely it's the battery if it's new. Just offering that as the symptoms described could be caused by it. I'd still rule it out.

Otherwise, could be the MAF as you said, or a throttle position sensor.

I'd also try to code reader again. Your buddy's reader isn't just generic ODBII, right, it's a full BMW scanner (like Bavarian Technic, P.A. Soft, etc.), correct? Not all codes that are BMW specific are read by all readers.
Correct, not generic. He does local coding for fellow enthusiasts in the area. he updated my car software to the 2006 models also earlier this year, it was still on the stock 2003 from factory.
__________________
'00 328i // Sold
'04 Z4 3.0i // Sold
'22 X3MC LCI
Appreciate 0
      11-29-2012, 04:48 PM   #6
pyo
Lieutenant
United_States
531
Rep
531
Posts

Drives: 2022 X3MC
Join Date: Feb 2012
Location: Fairfax, VA

iTrader: (1)

Garage List


looks okay to me. all connections were tight and did not budge when wiggled.
__________________
'00 328i // Sold
'04 Z4 3.0i // Sold
'22 X3MC LCI
Appreciate 0
      11-29-2012, 04:56 PM   #7
gferil
Captain
gferil's Avatar
30
Rep
740
Posts

Drives: 06 Z4MC
Join Date: Dec 2010
Location: San Francisco, CA

iTrader: (6)

I second Finnegan's comment on the TPS, I had the same symptoms and it turns out I had a defective TPS. I think Beta had the same issue as well too recently and solved it by installing a new one.
Appreciate 0
      11-29-2012, 05:57 PM   #8
pyo
Lieutenant
United_States
531
Rep
531
Posts

Drives: 2022 X3MC
Join Date: Feb 2012
Location: Fairfax, VA

iTrader: (1)

Garage List
Quote:
Originally Posted by gferil View Post
I second Finnegan's comment on the TPS, I had the same symptoms and it turns out I had a defective TPS. I think Beta had the same issue as well too recently and solved it by installing a new one.
Thanks!

Do you have the P/N by any chance? Quick search on zpost shows the z4m has 2, is this the same with the non-m z4?
__________________
'00 328i // Sold
'04 Z4 3.0i // Sold
'22 X3MC LCI
Appreciate 0
      11-29-2012, 06:35 PM   #9
gferil
Captain
gferil's Avatar
30
Rep
740
Posts

Drives: 06 Z4MC
Join Date: Dec 2010
Location: San Francisco, CA

iTrader: (6)

Check post #5 of this thread:
http://www.zpost.com/forums/showthread.php?t=592278
Appreciate 0
      11-30-2012, 03:10 PM   #10
pyo
Lieutenant
United_States
531
Rep
531
Posts

Drives: 2022 X3MC
Join Date: Feb 2012
Location: Fairfax, VA

iTrader: (1)

Garage List
Quote:
Originally Posted by gferil View Post
Thanks gferil.

I think that P/N is M specific though. I emailed getbmwparts.com and was given this #35426858575

Quote:
Hi Kenneth, thanks for your interest. The throttle position sensor for your vehicle is actually included as part of the accelerator pedal/module assembly:
Replacing the TPS with this should potentially resolve the issue right? Does anyone have a DIY on it? I am curious if it is in the same position as the M.
__________________
'00 328i // Sold
'04 Z4 3.0i // Sold
'22 X3MC LCI
Appreciate 0
      11-30-2012, 08:42 PM   #11
ZStig
instagram 997turbotom
279
Rep
7,376
Posts

Drives: Interlagos Z4MR
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (4)

I had an issue with the throttle position sensor too. on the M, its in front of the engine held on by 5 star bits IIRC. Once you have the replacement part in your hand its easy to find it on the engine. the TPS in the BACK of the engine is a PITA and more expensive. front one is like $35
__________________
Appreciate 0
      12-01-2012, 12:08 AM   #12
beta
Lieutenant Colonel
80
Rep
1,663
Posts

Drives: 2006 M Roadster
Join Date: Mar 2011
Location: CA

iTrader: (2)

Same here, got the part number from gferil and it fixed everything. Took 5 minutes to replace, and 4 of those minutes was finding a screw driver short enough. Hope it works for you to OP.
__________________
Appreciate 0
      12-01-2012, 12:10 AM   #13
beta
Lieutenant Colonel
80
Rep
1,663
Posts

Drives: 2006 M Roadster
Join Date: Mar 2011
Location: CA

iTrader: (2)

Mine happened also when the battery was going south, I think gferil also had run down the battery.

If this fixes it for you, then we know with a fair degree of certainty that a low battery condition can fry the TPS.
__________________
Appreciate 0
      12-01-2012, 03:16 PM   #14
pyo
Lieutenant
United_States
531
Rep
531
Posts

Drives: 2022 X3MC
Join Date: Feb 2012
Location: Fairfax, VA

iTrader: (1)

Garage List
My buddy (local mechanic that fixes cars on the side) keeps telling me there is no throttle position sensor for the non-m Z4's.

He read the codes again and it mentioned the idle control valve. He checked all the connections that he could get his hands on and crimped down the pins inside the connectors. Also reset the throttle adaptation via computer (local programmer to).

I will post if it occurs again.
__________________
'00 328i // Sold
'04 Z4 3.0i // Sold
'22 X3MC LCI
Appreciate 0
      10-14-2013, 04:11 PM   #15
Steeler
Colonel
Steeler's Avatar
2422
Rep
2,697
Posts

Drives: Built not Bought 04 Z4 VF
Join Date: Feb 2013
Location: Kitchener Ontario Canada

iTrader: (2)

Resurrecting an old thread but I am having the exact same issues described as well as a stumble around 3000rpm when cruising in 6th.

PYO did you ever get to the bottom of your EML issue?

Dave


Quote:
Originally Posted by pyo View Post
Last week while leaving the grocery store, I was shifting from 1st to 2nd gear when out of no where the EML light, brake light and DSC light came on. The engine RPM's kept oscillating from 700-1200rpm with the car out of gear and clutch disengaged. The car cannot be driven as I cannot get a steady acceleration. I was able to restart the car and the issue fixed itself.

My buddy with all the proper cables and software, hooked up to my OBDII however there were no codes stored in the database.

2 nights ago, a buddy helped me clean the ICV, DISA and Throttle body. It was a little dirty but not too bad. After cleaning it felt like the car was a little smoother.

This morning about 30 minutes into my drive into work (mostly highway until I get local), i was going about 30mph in 4th gear when it happened again. Same symptoms as before and could not be driven. I was in traffic and there was no where to pull over, so while rolling down the road I restarted the car and the issue yet again fixed itself.

Does anyone know what the issue could be? Since this occurs randomly and throws no codes, I haven't taken it to a shop yet.
__________________
W2A Intercooled Vortech V3Si, custom ducting, Alpha N, 60# Bosch,2.62 pulley, multi port WMI, Severn Tuning(pokeybritches), Tial, magnaflow,SS race muffler, 42 design,3.91LSD, H&R, Hotchkis,ST coils,Konis, Megan camber arms, AKG SS, Nylon mounts, Poly bushings, Carbon interior, CF Aero.APEX
Appreciate 0
      10-15-2013, 06:44 AM   #16
pyo
Lieutenant
United_States
531
Rep
531
Posts

Drives: 2022 X3MC
Join Date: Feb 2012
Location: Fairfax, VA

iTrader: (1)

Garage List
Quote:
Originally Posted by dbarton62 View Post
Resurrecting an old thread but I am having the exact same issues described as well as a stumble around 3000rpm when cruising in 6th.

PYO did you ever get to the bottom of your EML issue?

Dave
Unfortunately, No I didn't. I haven't been able to reproduce the problem since this post. The issue kind of resolved itself.

The only thing I've done to the engine since then was replace a torn intake hose thingy going into the ICV.
http://www.zpost.com/forums/showthread.php?t=816720
Can't tell you for certain if its related or not.

Looking back at this post, I see i created it in winter. I hope it doesn't happen again this winter now that I think about it...
__________________
'00 328i // Sold
'04 Z4 3.0i // Sold
'22 X3MC LCI
Appreciate 0
      10-15-2013, 07:57 AM   #17
Steeler
Colonel
Steeler's Avatar
2422
Rep
2,697
Posts

Drives: Built not Bought 04 Z4 VF
Join Date: Feb 2013
Location: Kitchener Ontario Canada

iTrader: (2)

Quote:
Originally Posted by pyo View Post
Unfortunately, No I didn't. I haven't been able to reproduce the problem since this post. The issue kind of resolved itself.

The only thing I've done to the engine since then was replace a torn intake hose thingy going into the ICV.
http://www.zpost.com/forums/showthread.php?t=816720
Can't tell you for certain if its related or not.

Looking back at this post, I see i created it in winter. I hope it doesn't happen again this winter now that I think about it...
It does seem to happen more often than not when it is cold.
I replaced the PCV hoses as well as seals on the hard line on top of the intake when I did the SC install so I know those are all good.
I am installing a rebuilt Vanos over the winter so will have to wait for next spring to see if that solves it.
__________________
W2A Intercooled Vortech V3Si, custom ducting, Alpha N, 60# Bosch,2.62 pulley, multi port WMI, Severn Tuning(pokeybritches), Tial, magnaflow,SS race muffler, 42 design,3.91LSD, H&R, Hotchkis,ST coils,Konis, Megan camber arms, AKG SS, Nylon mounts, Poly bushings, Carbon interior, CF Aero.APEX
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 02:30 PM.




zpost
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST