E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > ///M3 Forum

///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 10-15-2013, 01:08 PM   #1
Brucie Boy
Registered User
 
Join Date: Oct 2013
Location: uk
Posts: 17
My Ride: BMW M3 E46
SMG issue

Hello fellow M3 community.
This is my first post and hope someone can stear me in the right direction.
I have owned my 2002 m3 for just under six years. She had 42,000 on the clock when I bought her now has 101,000.
Since I have owned the car I have had my Smg light come on several times normally after sitting in heavy motorway traffic on a hot day. Each time it happened I would be understandably concerned but after doing Smg reset on each occasion I would forget about it until the next time the light would rear its ugly little head.
Over the last week the light on the dash has come on every morning when I have left the house to go to work. When I unlock the car I can hear the pump prime itself for several seconds. When I pull off the driveway first gear engages no probs second gear has a slight delay but then third gear would not engage.
At this point the yellow Smg light on dash comes on. Second gear pulls away to aprox 30 mph and 2000 rpm. I can hear the engine rev above 2000 rpm stay at 2000 and not excelarate. This would continue for a few minutes I would try to engage 3rd it flashes 3 for a split second then goes back in to 2nd with a thud.
Even though still in 2nd gear and only doing 30 mph I select neutral and hold both paddles. I pull the gear selector over to the right and then selector goes from 0 to 3rd. The car then drives normally the remaining 25 miles to work with the Smg light still illuminated with no other issue with the exception that when I come to a complete stop the car selects 2nd gear and will not allow me to manually downshift to 1st. As I said the Smg light remains on until I switch the car off and restart the car. The car then starts fine with no light on the dash also I then do not have the issue of the car not allowing me to select first gear.

This I thought I could live with until I could get the car to bmw indi in a few days time and get it on the diagnostics machine, however....... This afternoon when I left work I had the usual issue I have been having every time I start the car. I proceeded to go thought the now everyday procedure Smg light,not able to select 3rd, Smg reset then fine as usual. 5 mins up the road car was selecting every gear fine then all of a sudden when pulling away from traffic lights can selected 1st and second fine then when I shifted up to third on the paddle shift 3rd flashed for a split second and then went straight to 5th.
After about a second or two the car just died in 5th gear no power no revs no nothing. I could not down or up shift and the car just come to a gradual stop.
Luckily I was on a B road which had several lay-by along it and managed to pull over in to one. Again I tried to select up and down but the car remained in 5th.
I turned the key off and the gear indicator remained illuminated in 5th for around 30 seconds then went out. I then managed to restart the car in neutral and continued my journey home. I joined the motorway and stayed in the inside slow lane all the way home without any further incident.
It was only when I got home that I got to thinking how lucky I was that the car died on me on the B road just before I got on the motorway and not when I was on it as I would have been in the fast lane doing 70 mph how dangerous would that have been having a total loss of power in the outside lane and coming to a total stop????
Anyway, just wondering if anyone has any opinion what my SMG problem might be.im really hoping that it is not the pump and just a question of being the gear selector sensor as it's the cheaper of the two evils. As I mentioned before I can hear the pump priming when I get in to the car so probably more hope than think that this is not the issue. I have decided to leave the car at home until I can get her to the indi in a few days time and just use the wife's car to get me to work in the meantime.
Any reply / feedback would be greatly appreciated
Many thanks
Brucie Boy is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 10-15-2013, 01:19 PM   #2
joeysm3
Registered User
 
Join Date: Nov 2011
Location: brooklyn
Posts: 477
My Ride: ///M3 04 SMG
Re: SMG issue

Sounds like a gear position sensor and compression spring. Also check your smg fluid level and change ur salmon relay. Goodluck!
__________________

Last edited by joeysm3; 10-15-2013 at 01:20 PM.
joeysm3 is offline   Reply With Quote
Old 10-15-2013, 02:09 PM   #3
Brucie Boy
Registered User
 
Join Date: Oct 2013
Location: uk
Posts: 17
My Ride: BMW M3 E46
Thanks Joey. Have checked fluid, level is fine. I changed the salmon relay a few months back so no probs with either of those.
Thanks again for your reply. As I said really hope is gear positioning sensor and not the pump..got to have brain surgery in a month or so to remove a brain tumor and won't be working for probably a year or so could really do without the hassle and expense at the moment. These things seem to always happen when you least need it.
Brucie Boy is offline   Reply With Quote
Old 10-15-2013, 02:12 PM   #4
joeysm3
Registered User
 
Join Date: Nov 2011
Location: brooklyn
Posts: 477
My Ride: ///M3 04 SMG
Re: SMG issue

Sorry to hear that. Goodluck with ur surgery! But again its both gear position sensor and compression spring. Also you need to find someone to bleed the smg system. The parts themself aren't expensive. GPS arohnd 350 new and springs are 100 as a kit. Labor is the expensive part.
__________________
joeysm3 is offline   Reply With Quote
Old 10-15-2013, 02:22 PM   #5
Brucie Boy
Registered User
 
Join Date: Oct 2013
Location: uk
Posts: 17
My Ride: BMW M3 E46
Cool. Didn't know about the bleeding the Smg. Got a price fro bmw today 300 for the gps. Will get a price for the spring kit.
Thanks for the infoz
Brucie Boy is offline   Reply With Quote
Old 10-15-2013, 02:40 PM   #6
joeysm3
Registered User
 
Join Date: Nov 2011
Location: brooklyn
Posts: 477
My Ride: ///M3 04 SMG
Re: SMG issue

Goodluck do it at a shop you trust and know what they are doing.
__________________
joeysm3 is offline   Reply With Quote
Old 10-15-2013, 03:19 PM   #7
Brucie Boy
Registered User
 
Join Date: Oct 2013
Location: uk
Posts: 17
My Ride: BMW M3 E46
Going to get the car diagnosed at a local Indy that I have just found out about. Will likely have the work done at a friends Garrage. He runs a mot test centre. He ain't no BMW specialist but I know he won't pull my pants down and I can trust him to do what he says he will do. When he connected his diagnostic machine a few months back he didn't look very sure and said I think you might have to change the pump. I think his machine covers a lot of different makes of car but just chucks out many generic codes. That's why am going to Bm Indy to diagnose
Brucie Boy is offline   Reply With Quote
Old 10-16-2013, 12:04 AM   #8
sakumaxp
Registered User
 
Join Date: Mar 2011
Location: Diamond Bar
Posts: 1,114
My Ride: 02 M3 convertible
i had the same issue with my 02 M3, it would skip 3rd and my smg light was on, it turned out to be a broken compression spring, it broke in 3 places. the spring is only like 10-15 bucks. good luck
__________________

Carbon Black Metallic
SMG II
Verttttt
VCSL Front Bumper
VCSL 1 Piece Splitter
VIS GTR Hood
6K Angel Eyes
VMR VB3 19's
KW V2 coilovers
sakumaxp is offline   Reply With Quote
Old 10-16-2013, 01:11 AM   #9
Brucie Boy
Registered User
 
Join Date: Oct 2013
Location: uk
Posts: 17
My Ride: BMW M3 E46
Thanks Sakumaxp,

Do you know if the broken compression spring would show up on diagnostic machine?
How did you find out about your problem also did you have to drop the whole trans to fix the spring?
How many hours labour?
Brucie Boy is offline   Reply With Quote
Old 10-16-2013, 03:18 AM   #10
turbo_f22_pilot
Registered User
 
Join Date: Dec 2009
Location: Mid-Atlantic Region
Posts: 1,159
My Ride: 2 pedals - 2 paddles
Compression springs won't show up as a fault code. But strange shifting such as yours is usually a sign of a compression spring/s issue.
__________________
In order to finish FIRST, you MUST first FINISH !

Joy is future proof
Get your "M" on . . .
Reading is FundaM3ntal




CAR:
2003 TIAG Coupe / Blk Interior / SMG / HK Premium
MODS:
EU-CSL Coded / Macht Schnell intake / OEM CSL Wheels / OEM CSL Diffuser / Dinan Exhaust
Full LED Conversion / HID fog / Aurora AE / RE RTAB FCAB

BMWCCA NCC
turbo_f22_pilot is offline   Reply With Quote
Old 10-16-2013, 05:26 AM   #11
Brucie Boy
Registered User
 
Join Date: Oct 2013
Location: uk
Posts: 17
My Ride: BMW M3 E46
Cheers Turbo,

Does the whole trans have to be dropped to check for broken comp springs?
Brucie Boy is offline   Reply With Quote
Old 10-16-2013, 10:55 AM   #12
joeysm3
Registered User
 
Join Date: Nov 2011
Location: brooklyn
Posts: 477
My Ride: ///M3 04 SMG
usually yes.
__________________
joeysm3 is offline   Reply With Quote
Old 10-16-2013, 11:44 AM   #13
Brucie Boy
Registered User
 
Join Date: Oct 2013
Location: uk
Posts: 17
My Ride: BMW M3 E46
SMG issue

Sent from BimmerApp mobile app
Brucie Boy is offline   Reply With Quote
Old 10-16-2013, 02:30 PM   #14
sakumaxp
Registered User
 
Join Date: Mar 2011
Location: Diamond Bar
Posts: 1,114
My Ride: 02 M3 convertible
Quote:
Originally Posted by Brucie Boy View Post
Thanks Sakumaxp,

Do you know if the broken compression spring would show up on diagnostic machine?
How did you find out about your problem also did you have to drop the whole trans to fix the spring?
How many hours labour?
no it would not show up on a diagnostic machine.

i found out about my problem on the forums and some research.

no the shop i went to didnt have to drop the whole trans, there is enough space around it to get the spring out and put a new one in.

they charged me 110 thats after tax and everything, it was about an hour of labor.
__________________

Carbon Black Metallic
SMG II
Verttttt
VCSL Front Bumper
VCSL 1 Piece Splitter
VIS GTR Hood
6K Angel Eyes
VMR VB3 19's
KW V2 coilovers
sakumaxp is offline   Reply With Quote
Old 10-16-2013, 02:33 PM   #15
sakumaxp
Registered User
 
Join Date: Mar 2011
Location: Diamond Bar
Posts: 1,114
My Ride: 02 M3 convertible
Quote:
Originally Posted by joeysm3 View Post
usually yes.
majority of the shops will say yes they must drop your tranny to check, but they just want to charge you up the butt for labor. EAS is my shop of choice and i was looking at them do the job, they used a mirror a lot like the one the dentist uses to look at the back of your teeth along with a flashlight so they could see if the spring was broken or not.
__________________

Carbon Black Metallic
SMG II
Verttttt
VCSL Front Bumper
VCSL 1 Piece Splitter
VIS GTR Hood
6K Angel Eyes
VMR VB3 19's
KW V2 coilovers
sakumaxp is offline   Reply With Quote
Old 10-16-2013, 02:41 PM   #16
Brucie Boy
Registered User
 
Join Date: Oct 2013
Location: uk
Posts: 17
My Ride: BMW M3 E46
SMG issue

***163;100 seems reasonable. Quite good in fact. I'm interested in knowing did you change the gps aswel and did you ask the mechanic specifically to look for and change the broken spring or did he go in looking to try and find out what the problem was and stumble across it?
Also did you have any diagnostic work done that threw up a code that confirmed or led you to believe that a broken spring was the issue before the mechanic started taking off the exhaust etc?


Sent from BimmerApp mobile app
Brucie Boy is offline   Reply With Quote
Old 10-16-2013, 02:55 PM   #17
sakumaxp
Registered User
 
Join Date: Mar 2011
Location: Diamond Bar
Posts: 1,114
My Ride: 02 M3 convertible
no i did not change the gps. (he said those rarely go out)

i told him exactly what i needed which was just the change the compression spring so he went right to it and that was the problem.

no a broken spring will not throw you a code at all.
__________________

Carbon Black Metallic
SMG II
Verttttt
VCSL Front Bumper
VCSL 1 Piece Splitter
VIS GTR Hood
6K Angel Eyes
VMR VB3 19's
KW V2 coilovers
sakumaxp is offline   Reply With Quote
Old 10-16-2013, 02:55 PM   #18
Brucie Boy
Registered User
 
Join Date: Oct 2013
Location: uk
Posts: 17
My Ride: BMW M3 E46
SMG issue

What and where is EAS? What part of the world are you from bud?


Sent from BimmerApp mobile app
Brucie Boy is offline   Reply With Quote
Old 10-16-2013, 02:57 PM   #19
sakumaxp
Registered User
 
Join Date: Mar 2011
Location: Diamond Bar
Posts: 1,114
My Ride: 02 M3 convertible
Quote:
Originally Posted by Brucie Boy View Post
What and where is EAS? What part of the world are you from bud?


Sent from BimmerApp mobile app
EAS is short for european auto source, its a shop that specializes in BMW, benz, and other euros. im in southern california. United states
__________________

Carbon Black Metallic
SMG II
Verttttt
VCSL Front Bumper
VCSL 1 Piece Splitter
VIS GTR Hood
6K Angel Eyes
VMR VB3 19's
KW V2 coilovers
sakumaxp is offline   Reply With Quote
Old 10-16-2013, 03:03 PM   #20
Brucie Boy
Registered User
 
Join Date: Oct 2013
Location: uk
Posts: 17
My Ride: BMW M3 E46
SMG issue

I think that enough can not be said in regard to having an honest reliable mechanic that knows their way around a BMW. Too many guys out there who are only too willing to pull down your pants and rip you off for as much as they can.
Also important to research as much as you can yourself and be armed with as much knowledge as possible so that they don't look at you like a mug that they can take to the cleaners!!!!
Would appear that you are a prime example to follow. Thank you.


Sent from BimmerApp mobile app
Brucie Boy is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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 On
Censor is ON





All times are GMT -5. The time now is 10:45 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use