Thread: 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?

So what sort of AFR here?

10's? 11's? 12's?

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