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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Air Fuel Gauge 02 Sensor Lambda Sensor
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<blockquote data-quote="Cyborg" data-source="post: 106519" data-attributes="member: 3426"><p>Thanks for the feedback. Strange that the instructions for mine say keep it under 800C, quite a bit higher. Its a new kit, so maybe the sensor is different? Mine is a Bosch 17025. I contacted the manufacturer of the A/F gauge and asked about current draw. The reply was max 2.5 amps. I also emailed Bosch and asked about location of the sensor relative to the port. Probably a dumb question from their point of view because I couldn't give them the EGT..... but if I had that, I wouldn't have asked them so we'll see if they have a tech on staff who is sympathetic to a old M/C hooligan. I did mention the relatively close proximity of the exhaust port on Ducati and HD.</p><p>I wasn't planning on leaving the sensor in the pipe, just use it to sort out the jetting. I did some reading about sensor failures and they mentioned thermal shock. None of it is mentioned in my instructions, but its produced for car folks who likely all have an ECU that controls the heater etc during startup. </p><p>I don't think I'll fret about the sensor protruding into the flow although I suppose a longer bung might help keep the heat down in some applications.</p><p></p><p>Why sensors fail.</p><p></p><p> <a href="http://www.nzefi.com/bosch-lsu-wide-band-airfuel-ratio-lambda-sensors-fail-often-aftermarket-performance-applications/" target="_blank">http://www.nzefi.com/bosch-lsu-wide-band-airfuel-ratio-lambda-sensors-fail-often-aftermarket-performance-applications/</a></p><p></p><p>Most of the following video is painfully dry, but an interesting bit at 0:41 of the video where it talks about getting its clean reference air sample in the bridgeable wiring harness. Actually a good idea so if you drive a car in the rust belt and get undercoating applied, the "technician" won't knacker your sensor when he sprays it with goop and cuts off its reference air.</p><p></p><p>[MEDIA=youtube]u3OWEB_6GBc[/MEDIA]</p><p></p><p><strong>From the Bosch site: </strong></p><p><strong></strong></p><p><strong>What will damage my oxygen sensor?</strong></p><p></p><p>An oxygen sensor can fail prematurely if it becomes contaminated with phosphorus from excessive oil consumption, silicone from internal coolant leaks, using silicone sealant in the engine and some over-the-counter fuel additives. Even a small amount of poorly refined gasoline can affect an oxygen sensor. Environmental factors such as road splash, salt, oil and dirt can also cause a sensor to fail – as can thermal shock, mechanical stress, or mishandling.</p></blockquote><p></p>
[QUOTE="Cyborg, post: 106519, member: 3426"] Thanks for the feedback. Strange that the instructions for mine say keep it under 800C, quite a bit higher. Its a new kit, so maybe the sensor is different? Mine is a Bosch 17025. I contacted the manufacturer of the A/F gauge and asked about current draw. The reply was max 2.5 amps. I also emailed Bosch and asked about location of the sensor relative to the port. Probably a dumb question from their point of view because I couldn't give them the EGT..... but if I had that, I wouldn't have asked them so we'll see if they have a tech on staff who is sympathetic to a old M/C hooligan. I did mention the relatively close proximity of the exhaust port on Ducati and HD. I wasn't planning on leaving the sensor in the pipe, just use it to sort out the jetting. I did some reading about sensor failures and they mentioned thermal shock. None of it is mentioned in my instructions, but its produced for car folks who likely all have an ECU that controls the heater etc during startup. I don't think I'll fret about the sensor protruding into the flow although I suppose a longer bung might help keep the heat down in some applications. Why sensors fail. [URL]http://www.nzefi.com/bosch-lsu-wide-band-airfuel-ratio-lambda-sensors-fail-often-aftermarket-performance-applications/[/URL] Most of the following video is painfully dry, but an interesting bit at 0:41 of the video where it talks about getting its clean reference air sample in the bridgeable wiring harness. Actually a good idea so if you drive a car in the rust belt and get undercoating applied, the "technician" won't knacker your sensor when he sprays it with goop and cuts off its reference air. [MEDIA=youtube]u3OWEB_6GBc[/MEDIA] [B]From the Bosch site: What will damage my oxygen sensor?[/B] An oxygen sensor can fail prematurely if it becomes contaminated with phosphorus from excessive oil consumption, silicone from internal coolant leaks, using silicone sealant in the engine and some over-the-counter fuel additives. Even a small amount of poorly refined gasoline can affect an oxygen sensor. Environmental factors such as road splash, salt, oil and dirt can also cause a sensor to fail – as can thermal shock, mechanical stress, or mishandling. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Air Fuel Gauge 02 Sensor Lambda Sensor
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