“Switch Chain Grip“....stalling out at lights

[deschodt]

My car threw the chain grip code a couple of days ago, which led me here.

I have an '03 that was converted to 6MT last year by a local shop. Mine was the first complete conversion they'd done, so I think there might be some details that were missed. I've had the idle-drop-with-clutch-in problem since Day One, as well as losing the mirror dip and parking sensor functionality. They bumped up the idle speed a bit to counter it, but at times the car is almost undriveable - particularly with the A/C on.

@deschodt (is this the deschodt with the Ghia?) - did you change the clutch switch too, or just the coding?

So yeah, I used to have a Ghia convertible loooong ago and your handle triggers some memories - KG list?
I did change the clutch switch first to the correct number (above in that thread I believe) but it made absolutely no difference. The laptop with INPA was telling me the clutch motion was detected correctly either way. The recoding with the MSS54 was what solved it 95% for me..
The car will try to die now and then at idle when coming to a stop but it's like 1/20th of what it was before and it almost never succeeds because I can see it coming more obviously. So as far as I am concerned, case closed now it's just an occasional glitch vs a daily certainty - and if I get around to cleaning the idle control valve I may get to 99%. The DME reflash to tell the car there was a conversion and no gear sensor did the trick for me !

Now before you think I'm brilliant, yesterday I spent 2 h "attempting" to replace my stuck open thermostat (seriously does anyone else get one dashboard light a week with this M3?) and a) the tube came out with the thermostat housing and would not come out of it in situ - making removal impossible, and I could not remove the bottom radiator hose despite all twisting and pulling and therefore I had to button it all up and admit defeat rather than break something. Effing car is not as easy to work on as a Ghia. Sounds a bit better though.. ;-)

[special77]

In case anyone stumbles upon this thread in the future….
following the coding instructions using a hex editor and bmw flash 100% solved this issue for my smg to 6mt. I assume that must mean the person that did my swap did not bother installing a GPS sensor. Doesn’t seem to affect the car in any way as it idles perfectly, cruise, PDC, and reverse mirror dip all work. No more random stalls and no more looks of disapproval from my gf (well, definitely less)

https://forums.m3cutters.co.uk/threa...ersion.186233/

[thegenius46m]

In case anyone stumbles upon this thread in the future….
following the coding instructions using a hex editor and bmw flash 100% solved this issue for my smg to 6mt. I assume that must mean the person that did my swap did not bother installing a GPS sensor. Doesn’t seem to affect the car in any way as it idles perfectly, cruise, PDC, and reverse mirror dip all work. No more random stalls and no more looks of disapproval from my gf (well, definitely less)

https://forums.m3cutters.co.uk/threa...ersion.186233/

That is 100% the issue.

[ugaexploder]

sorry to resurrect an old thread, but just want to check with you guys before making any changes. the shop that did the conversion for the previous owner did not install the GPS 23142229113. the m3cutters link mentions modifying a couple sections of the .bin file which is no issue, but mine looks quite different.

for instance, the first step is to modify 0x4028 and OP says it should be 01 changing to 02, but mine is ff. In fact, mine is ff from 3fc0 to 40f0 with only a couple bits being something else...



2nd part, it says to change 0x35ac from 0032 to ffff

here is mine: showing 2e29


are these bits still okay to modify per the m3cutters instructions even though they are represented differently than what is mentioned?

[bmwfnatic]

sorry to resurrect an old thread, but just want to check with you guys before making any changes. the shop that did the conversion for the previous owner did not install the GPS 23142229113. the m3cutters link mentions modifying a couple sections of the .bin file which is no issue, but mine looks quite different.

for instance, the first step is to modify 0x4028 and OP says it should be 01 changing to 02, but mine is ff. In fact, mine is ff from 3fc0 to 40f0 with only a couple bits being something else...



2nd part, it says to change 0x35ac from 0032 to ffff

here is mine: showing 2e29


are these bits still okay to modify per the m3cutters instructions even though they are represented differently than what is mentioned?

Those offsets mentioned are for a non-HP DME, and even then there are differences between versions.

Use TunerPro, load the appropriate XDF for your binary version and then look for K_S_GANG_LL_ED and K_SKRAFTS_CONTROL and it'll give you the correct offsets to edit in your hex editor or directly inside TunerPro of course.

[ugaexploder]

Those offsets mentioned are for a non-HP DME, and even then there are differences between versions.

Use TunerPro, load the appropriate XDF for your binary version and then look for K_S_GANG_LL_ED and K_SKRAFTS_CONTROL and it'll give you the correct offsets to edit in your hex editor or directly inside TunerPro of course.

really appreciate the advice, will take a look at TunerPro now

[sapote]

2nd part, it says to change 0x35ac from 0032 to ffff

here is mine: showing 2e29

I read it as 4B32, not 2E29.

[ugaexploder]

I read it as 4B32, not 2E29.

right, was referring to the m3cutters post where they mention 0032 which is in 0x35ae and 0x35af. i think there may be a mistake in the m3cutter instruction where they mention 0x35ac.

[Leez]

Hey guys

Resurrecting this thread but with twist. I have the same code after doing the smg to manual swap. Car was coded by martyn from ecuworx. Not sure if the code was supposed to be present. Car starts and runs well with the exception of throttle response . When stationary and if I tap the throttle, the car responds immediately and the rev bouces up as it should. If I start to move even at a snail like pace , the throttle response changes. Its as if its delayed/ laggy. Sometimes on a downshift i blip the throttle and the throttle response is poor. Also when taking off from a stop, the response is normal/quick and when the car just starts to move the respose changes and becomes slow.I have no idea what the issue is with regards to the throttle response. I have no other codes in the dme

[ejendow]

Hey guys

Resurrecting this thread but with twist. I have the same code after doing the smg to manual swap. Car was coded by martyn from ecuworx. Not sure if the code was supposed to be present. Car starts and runs well with the exception of throttle response . When stationary and it I tap the throttle, the car response immediately and the rev bouces up as it should. If I start to move even at a snail like pace , the throttle response changes. Its as if its delayed/ laggy. Sometimes on a downshift i blip the throttle and I have no idea what the issue is with regards to the throttle response. I have no other codes in the dme

I have this same issue! Hoping someone knows what might help this.

[Leez]

terra?