PocketLogger logs, getting bad knock!

[beatshack]

Here's a few 3rd gear pulls. One thing I"m confused by is how my logger shows a different timing value than the excel file. My logger shows me around 2 degrees TIMA at WOT, 6000rpm, while the excel file shows 18 degrees!?

These are 3rd gear pulls on 92 octane, 11psi, -5 degrees celcius outside temperature.

TPS RPM TIMA O2-R KNCK
23.9% 1938 37° 0.84V 0
12.5% 2281 33° 0.86V 0
14.5% 2344 37° 0.86V 0
22.4% 2313 38° 0.76V 0
25.5% 2500 34° 0.23V 0
31.4% 3500 33° 0.06V 4
32.2% 3438 33° 0.04V 4
52.9% 3406 31° 0.82V 3
69.0% 3500 25° 0.86V 3
78.8% 3594 22° 0.86V 2
83.1% 3719 19° 0.84V 2
83.1% 3781 18° 0.84V 2
83.5% 3875 18° 0.84V 1
83.9% 3969 20° 0.84V 5
83.9% 4094 18° 0.84V 5
84.3% 4125 17° 0.84V 4
83.9% 4250 17° 0.86V 4
83.9% 4313 18° 0.84V 4
83.9% 4406 18° 0.84V 8
83.9% 4438 17° 0.84V 8
83.9% 4594 16° 0.84V 12
83.9% 4594 16° 0.84V 11
83.9% 4719 15° 0.84V 11
83.9% 4813 15° 0.84V 11
83.9% 4875 14° 0.84V 10
83.9% 4969 14° 0.84V 10
83.9% 5000 14° 0.84V 10
83.9% 5000 14° 0.82V 10
83.5% 5063 14° 0.82V 11
83.5% 5188 15° 0.82V 11
83.1% 5250 16° 0.82V 11
83.1% 5313 16° 0.82V 10
83.1% 5469 16° 0.80V 10
82.7% 5406 17° 0.80V 10
82.7% 5563 17° 0.80V 10
82.7% 5625 18° 0.80V 9
82.7% 5656 18° 0.80V 9
82.7% 5719 18° 0.80V 15
82.7% 5844 16° 0.78V 14
82.7% 5844 17° 0.78V 21
82.7% 5969 14° 0.78V 21
82.7% 5875 14° 0.76V 26
82.7% 5969 12° 0.74V 25
82.4% 6031 13° 0.72V 25
82.4% 6094 13° 0.70V 25
81.2% 6156 12° 0.66V 25
12.5% 5969 12° 0.82V 18
12.5% 5750 39° 0.84V 3
22.7% 5188 44° 0.72V 0
36.9% 4906 45° 0.66V 0
38.8% 4438 31° 0.86V 1
12.5% 4313 28° 0.82V 0
12.5% 4438 43° 0.82V 0
12.5% 4406 44° 0.74V 0
12.5% 4406 30° 0.76V 0
12.5% 4375 30° 0.06V 0
12.5% 4344 30° 0.00V 0





80.8% 3563 23° 0.84V 0
76.9% 3875 20° 0.84V 0
75.3% 4031 19° 0.82V 0
66.3% 4313 19° 0.84V 0
60.8% 4594 20° 0.84V 0
61.6% 4719 20° 0.84V 6
63.1% 4813 18° 0.84V 6
71.4% 5000 18° 0.84V 6
74.1% 5156 18° 0.84V 6
77.6% 5344 19° 0.82V 11
76.1% 5375 16° 0.82V 11
68.2% 5594 16° 0.82V 10
68.2% 5781 17° 0.82V 10
81.2% 6031 18° 0.80V 10
81.6% 6000 18° 0.80V 10
81.6% 6094 18° 0.80V 9
81.6% 6156 18° 0.80V 9
81.2% 6344 18° 0.78V 9
81.2% 6375 15° 0.78V 13
78.0% 6469 15° 0.78V 12
65.1% 6500 15° 0.76V 12
12.5% 6438 16° 0.88V 0
13.7% 6094 45° 0.70V 0
80.4% 5563 45° 0.33V 0
87.1% 4594 25° 0.86V 0
87.5% 4563 20° 0.84V 7
87.1% 4656 17° 0.82V 6
87.1% 4656 18° 0.82V 6
87.1% 4813 18° 0.82V 6
85.5% 4781 17° 0.84V 5
85.1% 4938 17° 0.84V 5
83.1% 5000 18° 0.82V 5
82.0% 5000 17° 0.84V 4
79.6% 5219 18° 0.82V 4
78.4% 5188 18° 0.82V 4
77.6% 5281 18° 0.82V 7
77.3% 5250 17° 0.82V 7
74.9% 5406 18° 0.82V 9
73.7% 5406 20° 0.82V 8
70.6% 5563 19° 0.80V 13
69.8% 5531 16° 0.80V 17
68.6% 5594 16° 0.80V 16
67.8% 5750 15° 0.80V 16
12.5% 5625 16° 0.88V 13
12.5% 5250 41° 0.70V 0
33.7% 4969 45° 0.66V 0
40.4% 4813 35° 0.86V 0
40.8% 4094 29° 0.86V 0
27.1% 4125 27° 0.88V 0
25.5% 4125 34° 0.16V 0
20.0% 4094 36° 0.04V 0
12.5% 4000 42° 0.14V 0
12.5% 4063 41° 0.72V 0
12.5% 4063 42° 0.76V 0

 

[tom04841]

looks like your TPS isn't adjusted properly. The ecu doesn't go into closed loop until the tps hit 85 or 90%....can't remember which one.

If the ecu doen't go into closed loop, it still relies on the O2 sensor for feedback.

You need to adjust your TPS so it reads 100% at WOT. Once you do this, you should see your knock values go down and timing go up.

I really can't imagine you would be knocking that bad at only 11 psi, unless you have some other issues such as failing injectors.

Just out of curiosity, do you have the safc zero'd out?

 

[steve]

looks like your TPS isn't adjusted properly. The ecu doesn't go into closed loop until the tps hit 85 or 90%....can't remember which one.

WHile I aggree that this TPS seems off your information is incorrect.

First the two modes are closed and open loop, where closed loop is when the ECU uses the O2 sensor and open loop doesn't. The car is normally in closed loop at idle and during cruise. There are several conditions that will trigger the ECU to switch to open loop, TPS value is one, the actual threshold value depends on engine RPM but it's usually less than 50% throttle to cause the switch from closed to open loop.

beatshack, how old is your knock sensor?

Steve

 

[beatshack]

It's probably stock.. I have a brand new oem one sitting in my room. I'll put it in and log some more pulls.

Also - you'll notice when i'm off the throttle completely, my TPS reads 12.5%. I have tried absolutely STOMPING the pedal to the floor, and I can get it to hit 94%. I think the TPS is fine.

 

[weith1111]

...I pictured you rearing back and then trying to put your foot through the floor.

Is your AFC zeroed out? Add airflow to your next log so we can see if that is straight or not.

 

[steve]

Also - you'll notice when i'm off the throttle completely, my TPS reads 12.5%. I have tried absolutely STOMPING the pedal to the floor, and I can get it to hit 94%. I think the TPS is fine.

Still not right.
Reset the TPS to read 10% at idle and adjust the cables so that there is a a little slack but not more than 1/8" at idle. Then clean out whatever mats or whatever are under the pedal.
Make sure the the IPS is closing at idle and opening almost as soon at the throttle starts opening.

Steve

 

[beatshack]

Hmm ok. I know its not right, but I don't think the TPS issues will solve my knock problem. How does the IPS work? Does it throw a voltage when the throttle plate is closed? I'll test it.

P.S. - Anyone know my MMCD (1.8g) is showing a much lower TIMA number when I review logs on the palm? (Timing appears normal when imported to excel, but extremely low on palm).

 

[steve]

I mean the Idle Position Switch on the back of the throttle body next to the pulley.
Until you swap in a good knock sensor I'm not sure you have a knock problem but I know you have a TPS problem.

Steve

 

[beatshack]

I know where the IPS is, just not sure how to test if its working. I imagine when the throttle plate closes, it grounds the IPS or something to that extent? (Like the e-brake switch).

BTW Steve, thanks for your fast replies!

 

[steve]

Sorry, I misunderstood your reply.
The IPS grounds the signal from the ECU when the throttle is closed.
You can test it by disconnecting the the wire and checking continuity to ground when the throttle is closed. Or, checking the voltage with the wire attached, it should be close to 0 volts with the throttle closed and 12v with the throttle slightly open. Or, on the datalogger you can check the status of the switch. (mmcd look at what the flg settings are.)

Steve