Bl**dy Lambda sensors
11-11-2006, 11:08 PM
#1
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Bl**dy Lambda sensors
Right
I was going to blame lousy parts, but now two have failed (are failing) in slightly different ways...
I had a narrow band lambda sensor that worked for a while, then would give stupid readings (very very lean) after a while. Readings were false btw, else engine would be dead.
Replace with proper wide band, and today looking at the gauge, it was holding 14.3 afr. Obviously wrong, as when I nailed it and released the throttle, it stayed put!
Doesnt always do it, but struggling to believe that two diff sensors have failed in such wierd and similar ways.
Car does smoke a little on overrun (it is a cossie, after all) - is this affecting the sensors?
Lambda sensor is fitted to downpipe approx 4 inches back from flange.
Getting really pissed off with it.
Help?
JJ
I was going to blame lousy parts, but now two have failed (are failing) in slightly different ways...
I had a narrow band lambda sensor that worked for a while, then would give stupid readings (very very lean) after a while. Readings were false btw, else engine would be dead.
Replace with proper wide band, and today looking at the gauge, it was holding 14.3 afr. Obviously wrong, as when I nailed it and released the throttle, it stayed put!
Doesnt always do it, but struggling to believe that two diff sensors have failed in such wierd and similar ways.
Car does smoke a little on overrun (it is a cossie, after all) - is this affecting the sensors?
Lambda sensor is fitted to downpipe approx 4 inches back from flange.
Getting really pissed off with it.
Help?
JJ
12-11-2006, 01:13 AM
#2
Can't help ya, but never trust things 100% IMHO!
Had 2 standard ones on the Calibra fail causing the ECU to run in fail safe mode and over fuel like a bitch!
The Cossie wideband kit said 11.4:1 when I melted a piston so now I'm wary about the accuracy of that one as well!
Si
Had 2 standard ones on the Calibra fail causing the ECU to run in fail safe mode and over fuel like a bitch!
The Cossie wideband kit said 11.4:1 when I melted a piston so now I'm wary about the accuracy of that one as well!
Si
12-11-2006, 09:52 PM
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Hmmm
this would fit - it is still on a fixed ecu, which is sadly not to be trusted too much (stage 3)
That said, it didnt seem to be overly rich.
IT seems to be fine for a while, then it seems to just read 14.83 and stay there.
Driving me potty really. Must get cross generally
TB Honest, the prob is that the list of things that need to be done before paying to have it set up again (wiring etc) which seem to be ever growing.
Does the above sound like a failing sensor?
SiB - couldnt agree more, though I get some comfort at times
JJ
this would fit - it is still on a fixed ecu, which is sadly not to be trusted too much (stage 3)
That said, it didnt seem to be overly rich.
IT seems to be fine for a while, then it seems to just read 14.83 and stay there.
Driving me potty really. Must get cross generally
TB Honest, the prob is that the list of things that need to be done before paying to have it set up again (wiring etc) which seem to be ever growing.
Does the above sound like a failing sensor?
SiB - couldnt agree more, though I get some comfort at times
JJ
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