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      11-25-2007, 12:35 PM   #1
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Fault codes at track day - procede 2

Hi Just back home from a track day, and during it my car kept going into limp mode and displaying the engine sign. it happened about 15 times. I never get this problem on the road even when driving hard. have had v.2.0 now for 2 weeks and havent had a problem. anybody got any ideads? shiv?

p.s. i plugged in the Creader when i got home and it doesnt seem to display any codes
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      11-25-2007, 12:38 PM   #2
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Limp mode is not a code. Thats why Code Reader can't read it.

Have you upgraded your V2 with 2.0.1 map?

I know that 2.0.0 map had some limp issues.
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      11-25-2007, 12:41 PM   #3
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Yeah i have the new map. i did slightly adjst the torque settings in it though but that shouldnt affect it should it?
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      11-25-2007, 12:51 PM   #4
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which version map...i believe v2.02 you can mess with the settings but the propr one your supposed to leave the settings alone
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      11-25-2007, 12:52 PM   #5
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I Am Running V2.01
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      11-25-2007, 12:57 PM   #6
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do you think that is why it went into limp mode? how could i find out for sure?
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      11-25-2007, 01:06 PM   #7
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When you say slightly adjust torque settings, did you adjust up or down.

Also what octane gas you running?
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      11-25-2007, 01:10 PM   #8
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Quote:
Originally Posted by john335 View Post
do you think that is why it went into limp mode? how could i find out for sure?
If im understanding your question right... To find out for sure if it really is in limp mode just floor it and your car will not go over 3k rpms. Otherwise its just a check engine light from my experience!
I dont have V2 but from what i see adjusting the torque settings higher has brought a couple people CEL's and they had to back it down to 85% or something like that!
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      11-25-2007, 01:12 PM   #9
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I adjusted the torque that was previously 91% t 95%. i am running 97 octane (UK spec). it would go over 3k rpm but just had a lot less power
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      11-25-2007, 01:21 PM   #10
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Theres your problem. You bumped it up. Im not sure if 97 octane is the same as U.S. 96/97 octane. But Shiv I think mentioned not to bump up torque settings with map 2.0.1. Map 2.0.2 I think will fix your issue.
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      11-25-2007, 01:39 PM   #11
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97 EU spec octane is 90 US spec. U shouldn't change the torque settings running this octane. Especially on the track.Change it back to the default settings and test it.

Side question - manual or auto transmission?
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      11-25-2007, 01:56 PM   #12
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Oh wow, if its 90 octane, you need to lower those torque settings immediately. I would say go 5% less than the settings it came with.
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      11-25-2007, 02:00 PM   #13
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Quote:
Originally Posted by judec View Post
97 EU spec octane is 90 US spec. U shouldn't change the torque settings running this octane. Especially on the track.Change it back to the default settings and test it.

Side question - manual or auto transmission?
I thought 98 EU was 93 US. Why should -1 EU mean a -3 US?
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      11-25-2007, 02:41 PM   #14
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Your car is protecting itself from eminent detonation. You need either higher octane (96 us spec min) or lower boost settings.
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      11-25-2007, 05:01 PM   #15
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thanks for the help guys i will try it out and see what happens
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      11-25-2007, 05:11 PM   #16
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Quote:
Originally Posted by E90ice View Post
Limp mode is not a code. Thats why Code Reader can't read it.

Have you upgraded your V2 with 2.0.1 map?

I know that 2.0.0 map had some limp issues.
But limp mode does generate BMW-specific codes and they're stored in the ECU's memory. The C-reader can't read these - only generic ODBII codes. The dealer can read something like the last 3 limp mode codes generated.
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      11-25-2007, 05:17 PM   #17
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does anyone know where i can look at an octane uk/usa comparison chart?
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      11-25-2007, 05:31 PM   #18
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Quote:
Originally Posted by john335 View Post
does anyone know where i can look at an octane uk/usa comparison chart?
Copied from another thread:

US measurement is determined by (RON + MON)/2 = "AKI" (or "CLC")
AKI stands for Anti Knock Index
CLC stands for Cost of Living Council

91 RON, ~82-83 MON = ~87 AKI
95 RON, ~84-85 MON = ~90-91 AKI
98 RON, ~88 MON = ~93 AKI
100 RON ~89 MON = ~94 AKI
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      11-25-2007, 05:34 PM   #19
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Quote:
Originally Posted by stefano7171 View Post
I thought 98 EU was 93 US. Why should -1 EU mean a -3 US?
Ehm, making a little correction. U're right in octane mapping, but cant make the formula that simple, as the mapping is not linear.

US ~ Europe ~ RON ~ MON ~ (RON+MON)/2

Unleaded 87 ~ Normal 91 ~ 91 ~ 82.5 ~ 86.75
Plus 89 ~ Euro Super 95 ~ 95 ~ 85 ~ 90
Premium 91-94 ~ Super Plus 98 ~ 98 ~ 88 ~ 93

If we assume he UK Super 97 has MON=87, it would be 92 US spec. So U should be on the safe side using the default settings, and leave it there untill U get some real race gas and do your homework
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      11-25-2007, 05:37 PM   #20
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Quote:
Originally Posted by john335 View Post
does anyone know where i can look at an octane uk/usa comparison chart?
There is no absolute comparison chart. You need to know the MON to get the US equivalent (R+M)/2. 97 RON is pretty decent and usually combined with MON 87 for an equivalent of about 93 octane US spec. You shouldn't see the MON vary more than 2 grades, so your 97 RON probably falls between 92 and 94 octane US spec.
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      11-25-2007, 06:35 PM   #21
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One more advice. I think Shiv mentioned that higher than default torque settings can be applied only with 96 octane gas or higher (US specs).

I remember reading a document from MOTEC testing labs, where they tested Shell V-power Racig 100 vs two Premium 98 octane gasses (RON - EU spec) on an EVO IX engine on engine dyno using combinations of those fuels on the stock ECU and adjustable MOTEC M800 ECU using stock boost of 14psi and also 20psi via reprograming in MOTEC. The results were surprising (to me at least) - using V-Power they could achieve +4.6% engine HP and +10.5% torque, when they were able to adjust ignition timing by 3.5 degrees @ 14psi and 7deg @ 20psi.

I think adjusting ignition timing is the way (or one of them) Procede adjusts torque, that's why it's dependent on octane.

This was actually the first (if not the last) time I've seen any facts besides all of the marketing BS Shell feeds on the market. So it looks it works.

So - if U can get VPR100 in the UK, give it a try, adjust the procede torque settings in small steps and test it. And of course, dont forget to share the results.

Julius

EDIT: I'll try to look for that document if s/o is interested. Post here or PM me.
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      11-25-2007, 06:44 PM   #22
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Yes... you raised the boost with insufficient octane. That is the cause of the limp/reduced boost mode. As stated before, please leave the user torque settings untouched unless you run race gas or a race gas mix.

It is very important to follow this directive.

And if you aren't running at least 91oct (US (RON/MON)/2), you may have to reduce the user torque settings from the default values. This does not mean to run anything less than premium grade fuel. But only applies if your premium grade fuel is less-than-ideal.

Shiv
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