Why, why, why does my car keep killing O2/lambda sensor
#1
Why, why, why does my car keep killing O2/lambda sensor
Hi,
My car is eating O2 sensors, i am about to fit the 4th one in about 6/7 weeks. When it is 1st fitted it works fine, drive about 50 miles to work on a Sunday afternoon the AFR shows all the right readings, park the car up until Friday afternoon, as soon as i strike her up the AFR shows 'lean' and when i drive off the display shows nothing no matter what on/off boost or cruise I have checked the AFR and there are no faults with it. The sensors i am fitting have all been of the 'universal' type and NOT OE.
Any help/ideas would be a greatly appreciated. Thanx, Steve.
My car is eating O2 sensors, i am about to fit the 4th one in about 6/7 weeks. When it is 1st fitted it works fine, drive about 50 miles to work on a Sunday afternoon the AFR shows all the right readings, park the car up until Friday afternoon, as soon as i strike her up the AFR shows 'lean' and when i drive off the display shows nothing no matter what on/off boost or cruise I have checked the AFR and there are no faults with it. The sensors i am fitting have all been of the 'universal' type and NOT OE.
Any help/ideas would be a greatly appreciated. Thanx, Steve.
#2
Maybe the sensors aren't too good?
If you can justify the cost, get an Innovate LC-1 wideband system. It can simulate the narrow band output of the stock oxygen sensor plus you can accurately measure and log your AFRs with a computer.
If you can justify the cost, get an Innovate LC-1 wideband system. It can simulate the narrow band output of the stock oxygen sensor plus you can accurately measure and log your AFRs with a computer.
#5
Butty, yes the innovate can output a simulated narrowband signal, a wideband signal and a digital signal via serial cable at the same time.
b13bat, could the 02 sensor location also be the problem? I know on 97+ WRX, it was moved from the headers to the downpipe to increase 02 sensor lifetime. Also have you checked whether the 02 sensor heater circuit is ok? An unheated 02 sensor will get fouled quickly.
b13bat, could the 02 sensor location also be the problem? I know on 97+ WRX, it was moved from the headers to the downpipe to increase 02 sensor lifetime. Also have you checked whether the 02 sensor heater circuit is ok? An unheated 02 sensor will get fouled quickly.
Last edited by saiklon; 15 November 2008 at 02:37 PM.
#6
Butty, yes the innovate can output a simulated narrowband signal, a wideband signal and a digital signal via serial cable at the same time.
b13bat, could the 02 sensor location also be the problem? I know on 97+ WRX, it was moved from the headers to the downpipe to increase 02 sensor lifetime. Also have you checked whether the 02 sensor heater circuit is ok? An unheated 02 sensor will get fouled quickly.
b13bat, could the 02 sensor location also be the problem? I know on 97+ WRX, it was moved from the headers to the downpipe to increase 02 sensor lifetime. Also have you checked whether the 02 sensor heater circuit is ok? An unheated 02 sensor will get fouled quickly.
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#9
sounds like my problem too .but am yet to replace the lambda sensor .been told the universal ones are crap ??
already done the maf and that cured half the problem .
been told too check all fuses also
already done the maf and that cured half the problem .
been told too check all fuses also
#12
The O2 sensor gets much hotter in the headers than in the downpipe. And since it's a heated O2 sensor, the extra heat isn't helping it any.
Glad you sorted out your issue.
Glad you sorted out your issue.
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