utec tuners, PLEASE HELP

Reply Subscribe

Thread Tools

Search this Thread

Apr 8, 2004 | 08:45 PM

K2Skier

Thread Starter

Registered User

Joined: Dec 2002

Posts: 101

From: MA

Car Info: 2002 WRX/STI 2.5 liter VF22

utec tuners, PLEASE HELP

I have an annoying knock, and i can't figure out how to get rid of it! i seem to knock usually when i accelerate hard from ~4500rpm in 2nd gear into 3rd. my timing map and log are as follows:

Timing Map

[35] [35] [35] [35] [35] [35] [35] [35] [35] [35]
[35] [35] [35] [35] [35] [35] [35] [35] [35] [35]
[30] [30] [30] [30] [30] [30] [30] [30] [30] [30]
[30] [30] [30] [30] [30] [30] [30] [30] [30] [30]
[30] [30] [30] [30] [30] [30] [30] [30] [30] [30]
[27] [27] [27] [27] [27] [27] [27] [27] [27] [27]
[25] [25] [25] [25] [25] [25] [25] [25] [25] [25]
[20] [20] [20] [20] [20] [20] [20] [20] [20] [20]
[20] [17] [17] [17] [16] [16] [15] [14] [14] [14]
[18] [17] [17] [17] [16] [16] [15] [14] [14] [14]
[18] [17] [17] [17] [16] [16] [15] [14] [14] [14]
[18] [17] [17] [17] [16] [16] [15] [14] [14] [14]
[18] [17] [17] [17] [16] [16] [15] [14] [14] [14]
[18] [17] [17] [17] [16] [16] [15] [14] [14] [14]
[20] [19] [19] [19] [18] [18] [17] [16] [16] [16]
[21] [20] [20] [20] [19] [17] [17] [17] [17] [17]
[21] [21] [21] [21] [20] [17] [17] [17] [17] [17]
[22] [22] [22] [22] [21] [19] [19] [19] [19] [19]
[23] [23] [23] [23] [22] [22] [21] [21] [20] [20]
[23] [23] [23] [23] [22] [22] [21] [21] [21] [21]
[23] [23] [23] [23] [22] [22] [21] [21] [21] [21]
[23] [23] [23] [23] [22] [22] [21] [21] [21] [21]
[25] [25] [24] [24] [23] [23] [22] [22] [22] [22]
[25] [25] [24] [24] [23] [23] [22] [22] [22] [22]
[25] [25] [24] [24] [23] [23] [22] [22] [22] [22]
[25] [25] [24] [24] [23] [23] [23] [23] [22] [22]
[25] [25] [24] [24] [23] [23] [23] [23] [22] [22]
[25] [25] [24] [24] [23] [23] [23] [23] [22] [22]
[25] [25] [24] [24] [23] [23] [23] [23] [22] [22]
[25] [25] [24] [24] [23] [23] [23] [23] [22] [22]
[25] [25] [24] [24] [23] [23] [23] [23] [22] [22]
[25] [25] [24] [24] [23] [23] [23] [23] [22] [22]
[25] [25] [24] [24] [23] [23] [23] [23] [22] [22]
[25] [25] [24] [24] [23] [23] [23] [23] [22] [22]
[25] [25] [24] [24] [23] [23] [23] [23] [22] [22]

notes: during this log, i started out in 2nd gear at ~4500rpm, then
accelerated shifting into 3rd, shortlyafter i shifted into 3rd gear
i knocked twice.

4547 -7.5 2.5 10 00 00 14.7 +41.7 12.0 ECU. -6.6 ECU. 2.3
4578 -7.7 2.5 9 00 00 14.4 +41.9 12.0 ECU. -6.6 ECU. 2.3
4585 -7.9 2.5 9 00 00 14.6 +41.5 12.0 ECU. -6.6 ECU. 2.3
4655 -7.7 2.5 10 00 00 14.5 +41.7 13.0 ECU. -6.6 ECU. 2.3
4642 -7.7 2.5 9 00 00 14.4 +41.6 13.0 ECU. -6.6 ECU. 2.3
4655 -7.5 2.9 21 00 00 14.6 +28.1 65.0 ECU. -6.6 ECU. 3.1
4852 -4.7 3.6 100 10 00 rich +23.8 43.0 +22.2 -8.1 220.00 3.4
4997 -0.2 4.0 100 40 00 rich +19.2 69.0 +23.0 -6.7 220.00 3.8
5257 +6.4 4.2 100 70 00 rich +16.8 94.0 +21.0 -4.7 220.00 4.0
5420 +12.1 4.2 100 90 00 rich +23.3 86.0 +21.0 -7.1 220.00 3.9
5564 +15.1 4.2 100 80 00 rich +24.4 85.0 +21.0 -7.2 220.00 3.9
5747 +16.8 4.2 98 80 00 rich +25.4 85.0 +21.8 -7.6 220.00 3.9
6027 +15.9 4.3 99 80 00 rich +26.3 85.0 +22.0 -7.9 220.00 4.0
6150 +16.1 4.3 99 80 00 rich +26.3 86.0 +22.0 -7.7 220.00 3.9
6485 +16.4 4.3 99 80 00 rich +28.7 86.0 +22.0 -7.7 220.00 4.0
6385 +16.6 4.3 95 80 00 rich +29.3 85.0 +23.0 -7.7 220.00 4.0
6253 +13.3 3.5 0 00 00 rich +8.8 31.0 ECU. -6.6 ECU. 3.0
5910 +6.8 3.3 0 00 00 15.7 +8.8 31.0 ECU. -6.6 ECU. 3.2
5500 +1.1 3.6 34 00 00 14.2 +21.0 44.0 ECU. -6.6 ECU. 3.5
4462 -1.2 3.9 100 10 00 rich +19.7 53.0 +21.4 -7.7 200.00 3.6
4796 +1.9 4.1 99 60 00 rich +18.7 79.0 +20.2 -5.3 220.00 3.9
5065 +8.6 4.1 99 80 00 rich +20.4 80.0 +20.6 -6.6 220.00 3.9
5112 +14.5 4.1 99 90 00 rich +22.0 76.0 +20.4 -6.7 220.00 3.8
5175 +16.6 4.1 99 90 00 rich +22.5 78.0 +21.0 -7.1 220.00 3.8
5274 +17.0 4.1 98 80 00 rich +22.3 80.0 +21.0 -6.9 220.00 3.9
5282 +17.2 4.2 100 90 00 rich +22.8 80.0 +21.0 -6.8 220.00 3.8
5385 +17.6 4.2 98 90 00 rich +23.6 81.0 +21.0 -7.1 220.00 3.9
5574 +17.8 4.2 99 90 00 rich +24.4 80.0 +21.0 -7.2 220.00 3.9
5640 +17.8 4.2 98 90 00 rich +24.6 82.0 +21.0 -7.2 220.00 3.9
5717 +17.2 4.3 99 80 00 rich +24.7 81.0 +21.0 -7.4 220.00 3.9
6038 +16.4 4.2 99 80 00 rich +25.3 84.0 +21.3 -7.7 220.00 3.9
5868 +16.8 4.2 90 90 00 rich +25.6 64.0 +21.8 -7.8 220.00 3.9
5973 +16.4 4.2 38 00 02 rich +23.6 79.0 ECU. -6.6 ECU. 3.8
5931 +14.3 3.4 9 00 00 rich +37.5 28.0 ECU. -6.6 ECU. 3.0
6038 +8.0 3.2 0 00 00 rich +8.8 16.0 ECU. -6.6 ECU. 2.8
5574 +0.8 3.1 0 00 00 24.2 +8.8 16.0 ECU. -6.6 ECU. 2.9
5200 -5.7 3.0 0 00 00 24.2 +8.9 16.0 ECU. -6.6 ECU. 2.8
4803 -10.4 2.9 0 00 00 23.7 +8.9 16.0 ECU. -6.6 ECU. 2.7
4426 -10.8 2.8 0 00 00 23.7 +8.9 16.0 ECU. -6.6 ECU. 2.5
4145 -11.0 2.5 0 00 00 23.7 +11.1 16.0 ECU. -6.6 ECU. 2.3
4151 -11.4 2.1 0 00 00 24.2 +11.1 16.0 ECU. -6.6 ECU. 2.2
4100 -11.4 2.2 0 00 00 24.0 +11.3 16.0 ECU. -6.6 ECU. 2.0

Apr 10, 2004 | 02:16 PM

K2Skier

Thread Starter

Registered User

Joined: Dec 2002

Posts: 101

From: MA

Car Info: 2002 WRX/STI 2.5 liter VF22

sorry, didn't mean to stump everybody in here...:banana:

Apr 10, 2004 | 03:44 PM

boloheadrat

Registered User

iTrader: (11)

Joined: Jan 2003

Posts: 1,031

You will probably get better feedback in the EM forum. As for your log, if I'm reading it right, it looks like you started letting off of the gas right before the knock event. Just do the basic add fuel/pull timing around the problem cell. Maybe you could post a WOT log as well?

Apr 10, 2004 | 09:10 PM

K2Skier

Thread Starter

Registered User

Joined: Dec 2002

Posts: 101

From: MA

Car Info: 2002 WRX/STI 2.5 liter VF22

it happened right before i let off the throttle, you're right. i let off the throttle because it knocked. i added .2 of fuel in my 80-100% columns from 5000rpm to red, still knocked, then added .3 and it hasn't knocked yet..."knock" on wood...

Apr 11, 2004 | 08:20 PM

racerwrx

Guest

Posts: n/a

Looks like typical Shift Knock to me. I'd suggest going to http://www.wrxhackers.com/ and searching the UTEC forum for Shift Knock.

The short story is that the stock ECU runs the timing a little too advanced right after you shut the throttle from a heavy load at high RPM. The usual remedy is to set a timing value in the high RPM section of your 0% timing column, somewhere between 20 and 22 usually does the trick.