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
      07-26-2011, 08:42 PM   #89
iPhoneEngineer
Lieutenant
United_States
11
Rep
476
Posts

 
Drives: 2007 BMW Z4 M Coupe
Join Date: Jun 2010
Location: La Honda, CA

iTrader: (2)

Yeah, no doubt a few of the codes are related to the headers...

I'm quite curious about the brake booster code; perhaps the one-way valve for the brake booster was left out or improperly installed?

I haven't actually pulled codes using Rev, but don't have an SES light, so I assume that means none are set.
Appreciate 0
      07-27-2011, 10:12 AM   #90
ZStig
Major General
101
Rep
7,247
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

Getting no signal from my primary 02 sensors, which is probably causing the whole mess. The wiring from the engine to the headers was inspected, and the sensors themselves look new. ESS thinks they're not getting power to them, so thats the next thing we're gonna check tonight/tomorrow

(staying patient)
__________________
Appreciate 0
      07-27-2011, 05:12 PM   #91
Burn0utsRfun
Private First Class
3
Rep
136
Posts

 
Drives: Z3 M Rdstr
Join Date: Jan 2011
Location: Charleston, SC

iTrader: (1)

Quote:
Originally Posted by Roffle Waffle View Post
Getting no signal from my primary 02 sensors, which is probably causing the whole mess. The wiring from the engine to the headers was inspected, and the sensors themselves look new. ESS thinks they're not getting power to them, so thats the next thing we're gonna check tonight/tomorrow

(staying patient)
Try checking out the throttle potentiometers.
Appreciate 0
      07-27-2011, 07:47 PM   #92
ZStig
Major General
101
Rep
7,247
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

Tonight, I've tracked down that I'm not getting any power to fuse #32, which is responsible for something in engine management. Hope to get more info Friday
__________________
Appreciate 0
      07-28-2011, 02:29 AM   #93
Beedub
Brigadier General
United Kingdom
54
Rep
4,097
Posts

 
Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

awesome fault finding tom!!!

fuse 32 is this install related or something that can happen to any of us???
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      07-28-2011, 09:17 AM   #94
ZStig
Major General
101
Rep
7,247
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

Thanks . I'm gonna have the tech look at it Friday, he's booked today. My only concern is that fuse 32 might be strictly for the SMG transmission, I hope I'm wrong and its responsible for the 02 sensors too


edit: yeah, fuse 32 is only for the SMG I'm told by a BMW tech
__________________

Last edited by ZStig; 07-28-2011 at 10:20 AM.
Appreciate 0
      07-28-2011, 01:06 PM   #95
ZStig
Major General
101
Rep
7,247
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

Did some dremel/plasti-dip work last night. I'm not sure I like the lower grill cut open like that. I may go back to stock

__________________
Appreciate 0
      07-28-2011, 01:22 PM   #96
Beedub
Brigadier General
United Kingdom
54
Rep
4,097
Posts

 
Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

Quote:
Originally Posted by Roffle Waffle View Post
Did some dremel/plasti-dip work last night. I'm not sure I like the lower grill cut open like that. I may go back to stock

lol..... i like it!!! looks FAST even standing still

post a better pic please :-)
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      07-28-2011, 01:38 PM   #97
ZStig
Major General
101
Rep
7,247
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

fine fine. btw, the lower grill is a complete bitch to remove from the bumper
__________________
Appreciate 0
      07-28-2011, 01:47 PM   #98
inTgr8r
Major General
inTgr8r's Avatar
Canada
113
Rep
8,094
Posts

 
Drives: 07 M Coupe
Join Date: Mar 2006
Location: Toronto

iTrader: (7)

JMO, but I like it with the grill better.
I like the subtle but deadly look
__________________
Alpinweiss '07 M Coupe •DKF Section1•RPi GT exhaust•Fabspeed Headers•Autosolutions SSK•APR splitter•Tekarbon headlights•StrongStrut STB•H&R COs + ARBs•Poly FCAB/RTAB•Volk Racing G2•Direzza ZII•Stoptech BBK•Vibra-Tech mtr mounts•
Appreciate 0
      07-28-2011, 01:53 PM   #99
ZStig
Major General
101
Rep
7,247
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

yeah, I hope a new grill insn't too expensive. heh
__________________
Appreciate 0
      07-28-2011, 04:34 PM   #100
Beedub
Brigadier General
United Kingdom
54
Rep
4,097
Posts

 
Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

i wont be modding mine as i want a sleeper look..... but i really like it!! looks uber aggressive.

byron
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      07-29-2011, 05:16 PM   #101
Beedub
Brigadier General
United Kingdom
54
Rep
4,097
Posts

 
Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

anything happening Re o2 sensor issues/tune issues??
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      07-30-2011, 08:28 AM   #102
ZStig
Major General
101
Rep
7,247
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

One of my o2 sensors was completely gunked up from the car running rich for whatever reason. Ran great on initial startup. On second startup CEL came on, but thankfully for just P0030 code, which is 99% for the OTHER o2 sensors. Replacing that in a few hours today, hopefully that will do it, and not eat any more $$$ O2 sensors
__________________
Appreciate 0
      07-30-2011, 08:37 AM   #103
ZStig
Major General
101
Rep
7,247
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

Quote:
Originally Posted by Beedub View Post
i wont be modding mine as i want a sleeper look..... but i really like it!! looks uber aggressive.

byron
Yeah, sleeper look with world war 2 fighter exhaust? ooooook!
__________________
Appreciate 0
      07-30-2011, 07:18 PM   #104
ZStig
Major General
101
Rep
7,247
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

autoparts store delivered wrong parts, and then closed for the day....
__________________
Appreciate 0
      07-30-2011, 11:28 PM   #105
iPhoneEngineer
Lieutenant
United_States
11
Rep
476
Posts

 
Drives: 2007 BMW Z4 M Coupe
Join Date: Jun 2010
Location: La Honda, CA

iTrader: (2)

If you fouled your O2 sensor with just a single startup, mine must be completely annihilated at this point. Though I don't have any codes, perhaps it is contributing to the high-RPM power problem. Post some pictures of the old and new O2 if you can...how visually obvious was it that it was fouled?
Appreciate 0
      07-31-2011, 10:56 AM   #106
Beedub
Brigadier General
United Kingdom
54
Rep
4,097
Posts

 
Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

did any of you guys log AFRs??

just for reference im seeing 3rd gear pull @ wot see's a nice safe rich 11.3-5ish, in the higher gears like 5th a WOT situation see's a 12.5ish richening out towards the redline, checking with AJ and hans this is the perfect situation and exactly what i should be seeing.

i wish i could mount my iphone somehow to grab some shots of my gauges during some runs...... Im going to try and grab a lady friend to do the camera work for me.....
also FYI tom and iphone, my "new" s/c unit has just had its first oil change @ 500 miles, i will do it again in anothr 500 miles, this oil change has rendered the unit almost silent, @ idle you can even hear it bar the whistle the s/c makes.
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      08-01-2011, 08:51 PM   #107
ZStig
Major General
101
Rep
7,247
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

Made significant progress. The shop that installed my euro headers had put the secondary sensors in, and left the primaries out. OOPS!

Had to get 2 new primary o2 sensors, since the old ones went bad while hanging out in the air under the hood. I held off on welding in the rear 02s because I was initially told that its not necessary with the ecu tune.

Anyway, it only goes into limp mode at redline, except one time at 5k rpm. BUT not throwing any codes. So likely a tune issue, that I'll either find on the dyno on saturday or earlier if ESS sends the shop a portable unit


So at least I can ALMOST enjoy the car to the fullest... I'll try to grab some video tomorrow. Ordering a boost gauge too..
__________________
Appreciate 0
      08-01-2011, 10:18 PM   #108
Burn0utsRfun
Private First Class
3
Rep
136
Posts

 
Drives: Z3 M Rdstr
Join Date: Jan 2011
Location: Charleston, SC

iTrader: (1)

Quote:
Originally Posted by Roffle Waffle View Post
Made significant progress. The shop that installed my euro headers had put the secondary sensors in, and left the primaries out. OOPS!

Had to get 2 new primary o2 sensors, since the old ones went bad while hanging out in the air under the hood. I held off on welding in the rear 02s because I was initially told that its not necessary with the ecu tune.

Anyway, it only goes into limp mode at redline, except one time at 5k rpm. BUT not throwing any codes. So likely a tune issue, that I'll either find on the dyno on saturday or earlier if ESS sends the shop a portable unit


So at least I can ALMOST enjoy the car to the fullest... I'll try to grab some video tomorrow. Ordering a boost gauge too..
Glad to hear your close to getting it running well! Must be a lot of frustration, I would be going crazy ha.
Appreciate 0
      08-01-2011, 10:44 PM   #109
ZStig
Major General
101
Rep
7,247
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

I've been in much more stressful car situations, which taught me a lot of patience. At least the car was running more or less OK the whole time, I just couldn't drive it to its full potential.

but then again its not 100% yet, so lets see how patient I really am
__________________
Appreciate 0
      08-01-2011, 11:23 PM   #110
iPhoneEngineer
Lieutenant
United_States
11
Rep
476
Posts

 
Drives: 2007 BMW Z4 M Coupe
Join Date: Jun 2010
Location: La Honda, CA

iTrader: (2)

Quote:
Originally Posted by Roffle Waffle View Post
[...]

Had to get 2 new primary o2 sensors, since the old ones went bad while hanging out in the air under the hood. I held off on welding in the rear 02s because I was initially told that its not necessary with the ecu tune.

[...]

I've been in much more stressful car situations, which taught me a lot of patience. At least the car was running more or less OK the whole time, I just couldn't drive it to its full potential.
What do you mean...the wideband (primary) O2s were left plugged in but not installed in the exhaust? That seems pretty dicy, as I'm almost positive they have a heating circuit to bring them up to temperature. In any event, how could you tell they needed to be replaced?

I know what you mean about "more stressful" situations; I'm pretty damn worried about my kit, but it's not as bad as the time my Supra was behaving completely erratically due to a hidden, loose ECU ground .
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
Forum Jump


All times are GMT -5. The time now is 08:48 PM.




zpost
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
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