O2 sensors
Three Wheeling
Joined: Dec 2020
Posts: 80
Likes: 14
How exactly do you check if a catalytic converter is good? As far as I know all that can be done is checking the physical condition of the outside of the unit.
Wait, i found this:
To test for blockage, Access a pressure point before the catalytic converter, install a back pressure gauge and measure the back pressure. Normal reading should be less than 9 kPa @ idle and less than 20 kPa @ 2500 RPM. A high reading indicates the catalytic converter may be damaged or blocked. To test efficiency, Hold the engine speed at 2500 RPM for several minutes to heat up the catalytic converter and allow engine to idle. Using a pyrometer (high temperature thermometer), measure the temperature of the exhaust pipe around 50 mm before and after the catalytic converter. The outlet temperature should be at least 40°C hotter than the inlet temperature. If not, the catalytic converter may be faulty.
I can do the temp test, I think, but not the pressure test. Also, we have two sets of converters on our LR2s. Not sure if this test really applies.
Wait, i found this:
To test for blockage, Access a pressure point before the catalytic converter, install a back pressure gauge and measure the back pressure. Normal reading should be less than 9 kPa @ idle and less than 20 kPa @ 2500 RPM. A high reading indicates the catalytic converter may be damaged or blocked. To test efficiency, Hold the engine speed at 2500 RPM for several minutes to heat up the catalytic converter and allow engine to idle. Using a pyrometer (high temperature thermometer), measure the temperature of the exhaust pipe around 50 mm before and after the catalytic converter. The outlet temperature should be at least 40°C hotter than the inlet temperature. If not, the catalytic converter may be faulty.
I can do the temp test, I think, but not the pressure test. Also, we have two sets of converters on our LR2s. Not sure if this test really applies.
Winching
Joined: Dec 2018
Posts: 574
Likes: 165
How exactly do you check if a catalytic converter is good? As far as I know all that can be done is checking the physical condition of the outside of the unit.
Wait, i found this:
To test for blockage, Access a pressure point before the catalytic converter, install a back pressure gauge and measure the back pressure. Normal reading should be less than 9 kPa @ idle and less than 20 kPa @ 2500 RPM. A high reading indicates the catalytic converter may be damaged or blocked. To test efficiency, Hold the engine speed at 2500 RPM for several minutes to heat up the catalytic converter and allow engine to idle. Using a pyrometer (high temperature thermometer), measure the temperature of the exhaust pipe around 50 mm before and after the catalytic converter. The outlet temperature should be at least 40°C hotter than the inlet temperature. If not, the catalytic converter may be faulty.
I can do the temp test, I think, but not the pressure test. Also, we have two sets of converters on our LR2s. Not sure if this test really applies.
Wait, i found this:
To test for blockage, Access a pressure point before the catalytic converter, install a back pressure gauge and measure the back pressure. Normal reading should be less than 9 kPa @ idle and less than 20 kPa @ 2500 RPM. A high reading indicates the catalytic converter may be damaged or blocked. To test efficiency, Hold the engine speed at 2500 RPM for several minutes to heat up the catalytic converter and allow engine to idle. Using a pyrometer (high temperature thermometer), measure the temperature of the exhaust pipe around 50 mm before and after the catalytic converter. The outlet temperature should be at least 40°C hotter than the inlet temperature. If not, the catalytic converter may be faulty.
I can do the temp test, I think, but not the pressure test. Also, we have two sets of converters on our LR2s. Not sure if this test really applies.
. Straight pipe that LR2 and get two O2 sensors decats 
, https://www.magnumtuning.com/en/deta...land-rover/lr2Let me know how it works out
Thread Starter
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TReK
Joined: Jan 2020
Posts: 2,152
Likes: 631
From: Massachusetts
Bang on the cat with a rubber mallet and fingers crossed . Straight pipe that LR2 and get two O2 sensors decats , https://www.magnumtuning.com/en/deta...land-rover/lr2
Let me know how it works out
. Straight pipe that LR2 and get two O2 sensors decats , https://www.magnumtuning.com/en/deta...land-rover/lr2Let me know how it works out
Three Wheeling
Joined: Dec 2020
Posts: 80
Likes: 14
Three Wheeling
Joined: Dec 2020
Posts: 80
Likes: 14
Here is the wiring for bank 1 sensor 2
Thread Starter
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TReK
Joined: Jan 2020
Posts: 2,152
Likes: 631
From: Massachusetts
I decided to buy all four sensors. My car just hit 190,000 miles, that's well over the average lifespan of an o2 sensor, I have no idea when the sensors were last changed, if at all, and I found a good deal for a full set. When I get them I'll go buy the right tool and just get it done.
Recovery Vehicle
Joined: Apr 2019
Posts: 959
Likes: 214
From: Ottawa, Canada
And a bottle of KatKlean or the CRC Guarantee to Pass. I was surprised by the results. In fact its now part of my spring clean up process to run a bottle of this.
Do the fuel trims look good…. usually a rich running engine or a sloppy (malfunctioning) injector leads to blocked cats….
I put 200 cell cats on the xkr…. but then had to add short bungs to the down streams in order to stop throwing codes. Its been fine for 5 years, since.
Its of interest to me that 91octane (non ethanol) will never result in a thrown code no matter how hard I hit the pedal. Not so with Ultra 94.
As for dumping the cats… I wouldn’t do that to mother nature even if it was legal.
Cheers.
Do the fuel trims look good…. usually a rich running engine or a sloppy (malfunctioning) injector leads to blocked cats….
I put 200 cell cats on the xkr…. but then had to add short bungs to the down streams in order to stop throwing codes. Its been fine for 5 years, since.
Its of interest to me that 91octane (non ethanol) will never result in a thrown code no matter how hard I hit the pedal. Not so with Ultra 94.
As for dumping the cats… I wouldn’t do that to mother nature even if it was legal.
Cheers.
Thread Starter
|
TReK
Joined: Jan 2020
Posts: 2,152
Likes: 631
From: Massachusetts
I decided to buy all four sensors. My car just hit 190,000 miles, that's well over the average lifespan of an o2 sensor, I have no idea when the sensors were last changed, if at all, and I found a good deal for a full set. When I get them I'll go buy the right tool and just get it done.
Three Wheeling
Joined: Dec 2020
Posts: 80
Likes: 14
You got lucky , i spent a 150 usd for an O2 sensor and it turned out to be a wiring issue , thats why i decided to chk the resistance and swap next time to confirm the fault b4 replacing , good job man , were the upstream sensors hard to access?