Hi
Being somewhat disappointed with no response on the Blackbox solutions BBS, I thought I'd try here ...
I used the RCL to try and find the troublesome fault on my 4.6 2000 RR.
According to Rave, the O2 sensors and / or the MAF sensor would probably log a fault code if they were faulty. How likely is it that one of these sensors could be faulty and not log a fault?
I viewed an O2 sensor log file (captured csv data) where the O2 sensor value drops very low, in some instances to 0v. Does this indicate a faulty sensor? or could it be caused by a faulty fuel flow, eg blocked injectors or (what I think I have as a problem) faulty emission control?
When viewing the data live, the O2 sensors tend to be opposite each other in value, eg if the left bank O2 sensor is .11 the right bank O2 sensor may be .79 then as they switch the values may be similar but transposed eg left bank is .79 and right bank now .11. Is this normal?
I noticed that the O2 readings switch levels approx every second, I believe (From reading RAVE) this is normal. However in my csv data there is the occasional "gap" of two seconds where the level change does not take place. See attached image for a portion of O2 sensor switching. The orange and blue lines are the O2 level changes.
My guess is this is representative of a fuel problem that I think I have
What is the RCL Lambda reading? I thought a lambda value was the value of the O2 sensor reading?
Kind regards
Peter
Being somewhat disappointed with no response on the Blackbox solutions BBS, I thought I'd try here ...
I used the RCL to try and find the troublesome fault on my 4.6 2000 RR.
According to Rave, the O2 sensors and / or the MAF sensor would probably log a fault code if they were faulty. How likely is it that one of these sensors could be faulty and not log a fault?
I viewed an O2 sensor log file (captured csv data) where the O2 sensor value drops very low, in some instances to 0v. Does this indicate a faulty sensor? or could it be caused by a faulty fuel flow, eg blocked injectors or (what I think I have as a problem) faulty emission control?
When viewing the data live, the O2 sensors tend to be opposite each other in value, eg if the left bank O2 sensor is .11 the right bank O2 sensor may be .79 then as they switch the values may be similar but transposed eg left bank is .79 and right bank now .11. Is this normal?
I noticed that the O2 readings switch levels approx every second, I believe (From reading RAVE) this is normal. However in my csv data there is the occasional "gap" of two seconds where the level change does not take place. See attached image for a portion of O2 sensor switching. The orange and blue lines are the O2 level changes.
My guess is this is representative of a fuel problem that I think I have
What is the RCL Lambda reading? I thought a lambda value was the value of the O2 sensor reading?
Kind regards
Peter
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