91GTABird

Anyone know why my o2 sensor mv's would be reading like this at idle? Could i have a cylinder running lean as in maybe leaky gasket with coolant? It stays in a steady pattern. If so is there anyway to locate that cylinder without pulling plugs, etc.?



875
970
323
791
857
888
897
880
906
888
880
835
857
818
809
685
866
946
964
968
972
955
946
933
933
928
840
769
955
981
990
977
964
804
137
124
119
106
88
84
80
75
71
71
71
66
80
212
469
685
813
871
915
897
906
902
915
919
911
897
880
849
875
813
822
809
831
548
712
619
553
429
340
274
305
186
968
990
995
990
986
964
946
827
849
941
946
933
897
888
888
844
778
486
278
159
146
111
102
97
93
84
88
106
283
557
743
866
871
884
911
880
884
906
906
888
884
862
906
897
857
857
782
809
738
641
429
314
128
119
106
106
111
97
111
667
778
844
884
893
911
884
911
919
897
897
906
902
875
906
902
862
849
813
760
632
575
526
327
150
141
124
106
106
106
102
181
539
751
893
884
902
888
888

Grumpy

There is no real way to reverse engineer which O2 reading correlates to which cylinder.

The O2 toggles as rich, lean, and inert slugs of gases pass it. All that shows is that it's working. The BL/Int, show weither it's rich or lean, as an average.

vernw

iTrader: (2)

What Grumpy's really saying is it's supposed to do that! Looks like it's working pretty normal to me......