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#11
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L.W.(ßill) Hughes III > wrote in
: I've looked into this a good bit at this point. I'm going to get a service manual, it should have the page I need like stated below. I've looked at everything I can get my hand on, including the schematics of Bosch sensors and have seen nothing mentioned about air. Not sure what that even means myself :-) Thanks for the info! Jay > That's hard for me to believe, the sensor's wires have to be > spliced for the cheapies: http://www.billhughes.com/95YJo2sensor.jpg > God Bless America, ßill O|||||||O > > mic canic wrote: >> >> please keep in mind the wiring on the sensor side of the connector >> carries a very small fraction of air to the sensor so it will work if >> you cut the wires and the sensor doesn't get the air and the check >> engine lite will come on a factory wiring schematic with the >> connector views is what you need > |
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#12
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On Tue, 01 Mar 2005 23:35:57 -0600, JMH > wrote:
>L.W.(ßill) Hughes III > wrote in : > >I've looked into this a good bit at this point. I'm going to get a service >manual, it should have the page I need like stated below. > >I've looked at everything I can get my hand on, including the schematics of >Bosch sensors and have seen nothing mentioned about air. Not sure what >that even means myself :-) > He's right about the air charge. Not sure of the exact usage, and couldn't find it in the service manual(note time of post<g>), but the wires to the sensor *do* indeed carry oxygen to the sensor. At GM electronics training classes we were told *not* to splice the O2 sensor wires, just for this reason. I've heard of cases where a really bad running engine, which is dumping a lot of oil into the exhaust will wick the oil up through the harness into the PCM. -- Old Crow '82 Shovelhead FLTC 92" 'Pearl' '95 Jeep Wrangler YJ TOMKAT, BS#133, SENS, MAMBM, DOF#51, SPUNGER#2 |
#13
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Some have the air charge coming in around the case to wires joint and
some have it coming in along the insulation for one wire. This is the outside air charge needed to compare to the inside to make the signal if any. I asked 'mic canic' which wire because I for one don't really think he knows which O2 sensor goes where or which is which. One type has to be crimped to 'jury rig' it to fit and the other type can be properly soldered and heat shrinked to jury rig it. The best is still the one that fits properly...... Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's "L.W.(ßill) Hughes III" wrote: > > That's hard for me to believe, the sensor's wires have to be > spliced for the cheapies: http://www.billhughes.com/95YJo2sensor.jpg > God Bless America, ßill O|||||||O > > mic canic wrote: > > > > please keep in mind the wiring on the sensor side of the connector carries a very > > small fraction of air to the sensor so it will work if you cut the wires and > > the sensor doesn't get the air and the check engine lite will come on > > a factory wiring schematic with the connector views is what you need |
#14
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On Wed, 2 Mar 2005 09:58:25 UTC Old Crow > wrote:
> On Tue, 01 Mar 2005 23:35:57 -0600, JMH > wrote: > > >L.W.(ßill) Hughes III > wrote in > : > > > >I've looked into this a good bit at this point. I'm going to get a service > >manual, it should have the page I need like stated below. > > > >I've looked at everything I can get my hand on, including the schematics of > >Bosch sensors and have seen nothing mentioned about air. Not sure what > >that even means myself :-) > > > > He's right about the air charge. Not sure of the exact usage, and > couldn't find it in the service manual(note time of post<g>), but the > wires to the sensor *do* indeed carry oxygen to the sensor. > At GM electronics training classes we were told *not* to splice the O2 > sensor wires, just for this reason. > I've heard of cases where a really bad running engine, which is > dumping a lot of oil into the exhaust will wick the oil up through the > harness into the PCM. I've heard the same story about O2 sensors and one I replaced in a Mitsubishi PU several years back came with very detailed instructions on how to coil any excess leads, don't pinch or kink the lead, why you couldn't cut the lead off, etc. Same for an old Buick - but these were the old single wire type of 15-20 years ago so I'm not sure how they apply to current sensors. They've made at least some progress in the last 15 years. -- Will Honea |
#15
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the o2 sensor must have a fresh air source outside the exhaust source for comparison
like mike stated and the o2's receive that from the the o2 sensor wiring. again you should never solder or crimp a o2 wire below the connector going to the o2 sensor a 02 can even detect fresh air coming down the exhaust from higher up and send bad signals( reports )to the pcm which in turn results in poor fuel management adaptives and will result in a check engine lite to make a long story short and i did not even mention 02 heater circuts hence the 4 wires and the sensors now Mike Romain wrote: > Some have the air charge coming in around the case to wires joint and > some have it coming in along the insulation for one wire. > > This is the outside air charge needed to compare to the inside to make > the signal if any. > > I asked 'mic canic' which wire because I for one don't really think he > knows which O2 sensor goes where or which is which. > > One type has to be crimped to 'jury rig' it to fit and the other type > can be properly soldered and heat shrinked to jury rig it. > > The best is still the one that fits properly...... > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > > "L.W.(ßill) Hughes III" wrote: > > > > That's hard for me to believe, the sensor's wires have to be > > spliced for the cheapies: http://www.billhughes.com/95YJo2sensor.jpg > > God Bless America, ßill O|||||||O > > > > mic canic wrote: > > > > > > please keep in mind the wiring on the sensor side of the connector carries a very > > > small fraction of air to the sensor so it will work if you cut the wires and > > > the sensor doesn't get the air and the check engine lite will come on > > > a factory wiring schematic with the connector views is what you need |
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