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Old 02-02-2004, 08:38 AM   #1
samh22a
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Join Date: Dec 2002
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Default strange knock logging with UTEC.. ?

In the manual, it's says : The UTEC will flash the CEL if knock is detected only when the UTEC is in charge of the timing.

Does this also apply to log files ?

Check this out :

Code:
3138, -3.4,2.5, 14, 00,   01,  14.3,+34.6,  12.0,ECU. , -6.6,ECU.  ,2.5
3186, -2.4,2.9, 38, 00,   00,  15.2,+32.0,  20.0,ECU. , -6.6,ECU.  ,2.7
3284, -1.0,3.0, 45, 00,   00,  13.5,+30.6,  17.0,ECU. , -6.6,ECU.  ,2.8
3350, +0.8,3.1, 45, 00,   00,  14.6,+29.6,  20.0,ECU. , -6.6,ECU.  ,2.9
3508, +2.9,3.2, 46, 00,   00,  14.5,+28.9,  22.0,ECU. , -6.6,ECU.  ,3.0
3635, +4.7,3.3, 46, 00,   11,  14.2,+25.1,  24.0,ECU. , -6.6,ECU.  ,3.1
3858, +6.2,3.4, 44, 00,   11,  15.5,+22.8,  28.0,ECU. , -6.6,ECU.  ,3.2
3963, +7.4,3.4, 36, 00,   00,  14.4,+26.0,  27.0,ECU. , -6.6,ECU.  ,3.2
4070, +8.2,3.5, 29, 00,   00,  14.3,+25.4,  28.0,ECU. , -6.6,ECU.  ,3.2
4251, +8.2,3.5, 28, 00,   00,  15.2,+25.2,  32.0,ECU. , -6.6,ECU.  ,3.3
4426, +8.4,3.6, 28, 00,   00,  12.7,+23.9,  40.0,ECU. , -6.6,ECU.  ,3.3
4566, +8.2,3.6, 27, 00,   00,  rich,+23.3,  43.0,ECU. , -6.6,ECU.  ,3.4
4351, +6.2,3.3,  0, 00,   00,  rich, +9.0,  18.0,ECU. , -6.6,LCM.  ,2.9
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Old 02-02-2004, 09:14 AM   #2
wrx plus
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Weird. Did you notice that at the bottom line, second column from the right where it should say ECU it actually says LCM? I've never seen that on any of my logs.
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Old 02-02-2004, 10:13 AM   #3
t-kid
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Could this be because it has a internal all forged
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Old 02-02-2004, 11:25 AM   #4
mick_the_ginge
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LCM, if memory serves me correct is Launch Control Mode

Here is a snippet of log with it in
Quote:
6184 +18.8 4.5 105 100 00 rich +22.8 97.8 +26.0 -8.0 290.00 4.1
6337 +18.6 4.5 104 100 00 rich +24.3 98.7 +26.0 -8.0 290.00 4.2
6447 +18.6 4.5 104 100 00 rich +24.8 98.5 +26.0 -8.0 290.00 4.2
6587 +19.0 4.5 104 100 00 rich +24.7 97.4 +26.0 -8.0 285.00 4.2
6497 +19.4 4.5 104 100 00 rich +25.7 97.1 +26.3 -8.0 285.00 4.2
5973 +19.2 4.2 105 100 00 lean +24.5 80.4 +24.6 -8.0 LCM. 3.9
5232 +18.6 4.2 105 90 00 lean +23.8 75.5 +23.2 -7.6 LCM. 3.8
5012 +17.6 4.3 104 80 00 22.1 +18.4 84.6 +21.2 -7.1 LCM. 3.8
4728 +17.8 4.3 104 90 00 rich +14.0 86.4 +21.2 -7.5 300.00 3.8
4880 +18.6 4.2 104 100 00 rich +17.2 84.1 +22.0 -7.6 300.00 3.8
4945 +19.6 4.1 105 100 00 rich +17.6 84.3 +22.6 -7.6 300.00 3.8
4894 +20.6 4.2 104 100 00 rich +19.0 83.6 +22.8 -7.7 300.00 3.9
4916 +20.8 4.2 104 100 00 rich +18.9 83.6 +22.6 -7.8 300.00 3.9
But that has nothing to do with your knock.

I expect that the UTEC is detecting knock but when it is not controlling timing it is not correcting it.

Look at this section of log

Quote:
3508, +2.9,3.2, 46, 00, 00, 14.5,+28.9, 22.0,ECU. , -6.6,ECU. ,3.0
3635, +4.7,3.3, 46, 00, 11, 14.2,+25.1, 24.0,ECU. , -6.6,ECU. ,3.1
3858, +6.2,3.4, 44, 00, 11, 15.5,+22.8, 28.0,ECU. , -6.6,ECU. ,3.2
3963, +7.4,3.4, 36, 00, 00, 14.4,+26.0, 27.0,ECU. , -6.6,ECU. ,3.2
4070, +8.2,3.5, 29, 00, 00, 14.3,+25.4, 28.0,ECU. , -6.6,ECU. ,3.2
4251, +8.2,3.5, 28, 00, 00, 15.2,+25.2, 32.0,ECU. , -6.6,ECU. ,3.3
You are very lean under these load conditions. Are you using a manual boost controller? I usually see this with an MBC. The ECU under 66% TPS or 5000 rpm is in closed loop fuel control. It's always going to target 14.7:1 or around that.

You may want to check your long term and short term fuel trims and force them to add some fuel.
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Old 02-02-2004, 11:47 AM   #5
samh22a
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You're right on the LCM, lC is enable, and the 2-step limit is set very low for testing purposes.


Now, that's what I was also thinking since there's a EBC currently installed on the car.

Now, I could add some fuel in my 0% column, but how much ? I don't have any EGT or TUNA installed in this car.

Should I reset the ECU first ? and if I do so, how long should I wait for the ECU to switch to the low-det fuel map ?

Thanks

Sam
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Old 02-02-2004, 11:54 AM   #6
mick_the_ginge
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You must be a stage 4 as your 0% is negative. You should do multiple things. Add some fuel in the 0% it's always better having the ECU remove a little fuel rather than adding it. Standard stage 4's that I see have something between -6 and -6.5 in the 0% above 1000 rpms. -4 to -5.5 in the very low rpms.

The issue is that the ECU is in closed loop fuel tuning mode so it's always going to correct....

Yes you should reset your ECU. Do that then do the IAM reset trick to force the ECU back into the aggressive map.

Reset ECU
Warm up car (must be fully warmed up)
In third gear or above drive the car with your foot on the brake and bring up the boost to around 10-14psi.
Do this 2 or 3 times and you should force the ECU back into the aggressive map. (If you have delta dash you can just monitor the IAM)

Use either DD or an OBDII scanner to monitor the ST and LT fuel trims, get them within -7 to +7 (I always like to be negative)
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Old 02-02-2004, 11:57 AM   #7
samh22a
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will do.

Thanks

Sam
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Old 02-02-2004, 12:43 PM   #8
CMJ
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Looks like you are experiencing the MY04 open loop delay problem. You are reaching over 8psi @ 15.2 afr.
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Old 02-02-2004, 12:48 PM   #9
samh22a
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this car has an EBC, so the problem here is PTFB.

Sam
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Old 02-02-2004, 12:50 PM   #10
mick_the_ginge
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Well spotted, I missed that piece of info in Sam's bio.

He is however under 60% TPS and 5000 rpm so the ecu will still be in closed loop fueling.

However you should contact TurboXS and see if you can get a early copy of 3.2 which is meant to resolve some of these issues.
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Old 02-02-2004, 12:52 PM   #11
samh22a
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sorry guys if this is confusing, but I'm not tuning my car.

It's a 2002 WRX

I'l well aware of the problem with the 2004 ECU, and that's why I'm still waiting on my UTEC

Sam
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Old 02-02-2004, 12:53 PM   #12
mick_the_ginge
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Stick with what I said in the beginning then
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Old 02-02-2004, 07:54 PM   #13
wrx plus
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Well that explains LCM to me I havn't yet played with launch control.
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