Re: False KR and how to get rid of it.
Quote:
Originally Posted by
silver86
Maybe this is it then. It doesn't seem to do it when i'm in 1st gear and it hits second. Its only if i'm already cursing on the highway and let it drop down to second it spikes to 4-5 but then rapidly drops to zero.
So would this be considered false knock? My gp just started doing this after the trans swap but i think it could be due to a "not-so-good" tune...
Re: False KR and how to get rid of it.
So I decided to put on the 3.1 pulley and tuned it a little. Here is a quick scan I did on the way to work. The car was at full temp as I had been driving it for about 45mins.
| Device Time |
Engine RPM(rpm) |
Knock Retard(Deg.) |
Timing Advance(°) |
Throttle Position(Manifold)(%) |
H2OS Sensor(mV) |
Speed (OBD)(mph) |
| 09:33.6 |
3916.5 |
0.791016 |
19 |
62.35294 |
- |
70.83632 |
| 09:34.0 |
3916.5 |
0 |
19 |
100 |
911.4 |
70.83632 |
| 09:34.5 |
4750.75 |
0 |
19.5 |
100 |
911.4 |
74.56454 |
| 09:35.1 |
4947.25 |
0 |
19.5 |
100 |
924.42 |
78.29277 |
| 09:35.5 |
5160.5 |
0 |
19.5 |
100 |
924.42 |
82.021 |
| 09:36.1 |
5160.5 |
0 |
19.5 |
100 |
920.08 |
82.021 |
| 09:36.6 |
5285 |
0 |
19 |
100 |
933.1 |
85.12785 |
| 09:37.0 |
4164.25 |
0 |
18.5 |
100 |
933.1 |
87.61333 |
| 09:37.5 |
3963.75 |
0 |
18.5 |
100 |
924.42 |
89.47746 |
Here is another scan I did on the way home and the tune was the same. But notice the knock? Maybe the IC was heat soaked from driving on the highway for 1hr.
Any ideas why it would start to knock out of nowhere?
| Device Time |
Engine RPM(rpm) |
Knock Retard(Deg.) |
Timing Advance(°) |
Throttle Position(Manifold)(%) |
H2OS Sensor(mV) |
Speed (OBD)(mph) |
O2 Volts Bank 1 sensor 1(V) |
| 53:33.0 |
5061.5 |
0 |
19.5 |
100 |
941.78 |
43.49598 |
- |
| 53:33.5 |
5460.5 |
0 |
19 |
100 |
941.78 |
47.84558 |
- |
| 53:34.1 |
5875 |
0 |
18 |
100 |
946.12 |
50.95244 |
- |
| 53:34.5 |
4245 |
0 |
18 |
100 |
941.78 |
50.95244 |
- |
| 53:35.0 |
4245 |
1.142578 |
19 |
100 |
937.44 |
56.54478 |
- |
| 53:35.5 |
4258.75 |
1.142578 |
17 |
100 |
937.44 |
60.89438 |
- |
| 53:36.0 |
4372 |
1.582031 |
17 |
100 |
937.44 |
64.6226 |
- |
| 53:36.5 |
4491.25 |
2.548828 |
17 |
100 |
933.1 |
68.97221 |
- |
| 53:37.0 |
4666.5 |
3.955078 |
16 |
100 |
937.44 |
68.97221 |
- |
| 53:37.5 |
4666.5 |
3.076172 |
16.5 |
100 |
933.1 |
72.70043 |
- |
| 53:38.0 |
4838 |
3.076172 |
11.5 |
7.843137 |
620.62 |
76.42866 |
- |
What do you guys think?
Re: False KR and how to get rid of it.
So what sort of AFR here?
10's? 11's? 12's?
Re: False KR and how to get rid of it.
my wideband 02 sensor just went out the other day so I ordered a new one from PLX I'm just waiting for it to come in. I will have it installed this weekend and do some more scans and see what its doing. I know the nb isnt very accurate to tune on but at the moment thats all i have. It seems like my fuel is all over the place. Here was another scan with the same tune but you can see it was richer. What would cause the fuel to be all over the place?
| Device Time |
Engine RPM(rpm) |
Knock Retard(Deg.) |
Timing Advance(°) |
Throttle Position(Manifold)(%) |
H2OS Sensor(mV) |
Speed (OBD)(mph) |
| 01:37.1 |
3125.75 |
0 |
16.5 |
32.54901886 |
733.460022 |
16.15565109 |
| 01:37.6 |
3125.75 |
0 |
18.5 |
49.41176605 |
954.7999878 |
21.12662125 |
| 01:38.0 |
3940 |
0 |
19 |
100 |
954.7999878 |
29.82581711 |
| 01:38.5 |
4537.75 |
0 |
19.5 |
100 |
954.7999878 |
36.66090012 |
| 01:39.0 |
5022.75 |
0 |
19.5 |
100 |
963.4799805 |
42.8746109 |
| 01:39.5 |
5022.75 |
0 |
20 |
100 |
963.4799805 |
42.8746109 |
| 01:40.0 |
5648 |
0 |
19 |
100 |
980.8400269 |
49.0883255 |
| 01:40.5 |
4049 |
0 |
19 |
100 |
980.8400269 |
53.43792343 |
| 01:41.1 |
4177.5 |
0 |
19 |
100 |
967.8200073 |
57.78752136 |
| 01:41.5 |
4300.5 |
0.3515625 |
19 |
100 |
963.4799805 |
62.13711929 |
| 01:42.0 |
4300.5 |
0.26367188 |
18.5 |
100 |
972.1599731 |
62.13711929 |
| 01:42.5 |
4000 |
0.26367188 |
34 |
7.84313726 |
759.5 |
65.24397278 |
