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Does anyone know about this mod. - see link? I suppose you should do it with a new sensor and if so, can a generic sensor be used - like from a GM/Ford?
Yup, an old trick, and a good one. Not sure why the '1985' cut-off, though. A redundant O2 sensor ground is never a bad idea, even on the later cars.
Except the the connectors the sensor on your car IS rather generic...although I'm not sure if it's the same as GM or Ford. But they are lots of low-priced choices out there even if you specify "Jaguar". Getting the original connectors costs more but save the (minor) effort of splicing wires.
Thank you Doug,
I'm doing all I can to smooth out the idle quality. Am I correct in stating that the Oxy. sensor is just a On/Off switch and not a resistance measuring one. If the later, the resistance curves would need to be identical.
A master of O2 sensors in any critter, I'm surely not.
1. The earlier units relied on the threaded male to female connection for the ground. Normal corrosion eliminated or lessened the conductivity. Hence, a redundant strap aided performance.
2. Later sensors were more complex, for my SBC swap. My effort to splice in added wire flopped. Shielded lead. But, an after market source provided extensions with proper connectors. Much better.
Brief interval in typing. Fed Billy and my guest "garden" cats.
the trick was discussed at Jag-Lovers ad nauseum in the mid 1990's. It was a technician who worked at Motorcars Ltd., who was also a poster at Jag Lovers who I believe came up with the idea.
I did it to my 1984 and it worked, and it still works, but I never installed a new sensor. What I did was to fabricate a proper copper strap with a ring connector and new crush washer, then tightened the old O2 Sensor back, haven't replaced it in years, I just reset the counter when the idiot light came on. The idling is very stable.
I have those straps made if you want to order one, go to my website and you'll see them there. I include a new crush washer with the strap. A cheaper solution is for you to make one.
with mine, you connect the opposite ring terminal to one of the cruise control bolts nearby. I made them long enough to reach and have some play, but not so long that you end up with a wad of spagetti.
To remove and reinstall the sensor you need a special tool otherwise there is a risk of damaging it. If you damage it you'll need a new one. I prefer to stick with the factory part which is more or less calibrated for the XK engine. Cheaper O2 Sensors are cheap in more than one sense. Stick with the Bosch sensor.
Thank you Doug,
I'm doing all I can to smooth out the idle quality. Am I correct in stating that the Oxy. sensor is just a On/Off switch and not a resistance measuring one. If the later, the resistance curves would need to be identical.
Lists Bosch 11027 as replacement for 1985 and other year XJ6 models. $30.00 Can. $$ delivered. Have ordered it and now for the ground strap. Will advise outcome.
I wanted to better ground my O2 sensor on my 86 Jag XJ6 series 3. Attached to the sensor - bring it to a grounding bolt on chasis, and it sparks like crazy. I undid the ground wire because it didn't make sense to me. What do you make of sparking like that. It was dramatic.
I wanted to better ground my O2 sensor on my 86 Jag XJ6 series 3. Attached to the sensor - bring it to a grounding bolt on chasis, and it sparks like crazy. I undid the ground wire because it didn't make sense to me. What do you make of sparking like that. It was dramatic.
David
That's pretty odd. I don't have a good explanation.
how many wires come out of the Oxygen Sensor and where did you connect the strap to the Sensor ?
The later oxygen sensors came (late 1985-on) with a ground cable already.
Ok. So what I thought was a ground is not. It is positive matching the positive terminal of the battery. What the heck’s is this and why is it uncovered on the firewall near the brake booster. Photo attached
oh my, that is NOT the oxygen sensor, The oxygen sensor is at the "Y" junction of the exhaust manifold where it meets the catalytic converter or "Y" pipe.
What is shown in your picture is the Always Hot power distribution from Alternator, NOT a Ground.
There's another junction post just like it on the opposite side of the car. Originally they're covered by rubber boots.....which break apart and fall away over the decades
Yeah -- I know where the O2 sensor is. I was trying to ground the sensor with an extra wire. Is that supposed to be exposed like that though? Seems dangerous
Yeah -- I know where the O2 sensor is. I was trying to ground the sensor with an extra wire. Is that supposed to be exposed like that though? Seems dangerous
As I said above they originally came with rubber protective boots .....that rot away. You can find equivalents with some Googling under "battery cable boots" or similar. Like this
Oxy. sensor ground strap and sensor replacement
