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Registered
Join Date: Oct 2002
Location: Loveland, CO
Posts: 610
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Connecting Air/fuel gauge
Hello everyone,
I have had my air/fuel gauge that i "made" from radio shack parts!!, hooked up for a while but i just wanted to make sure i have it connected right. There are 2 white wires and 1 black wire i believe on the O2 sensor, i spliced the gauge to the black wire. Is this correct? The gauge is suppose to read 0-1 volt and thats how it reads lean or rich. Any chance this could interfere with the dme or any electronics and make it run worse? Thanks John |
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12-17-2002, 09:29 PM
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Join Date: Dec 2002
Location: Albuquerque, NM
Posts: 9
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I believe the stock Bosch 3 wire O2 sensor has the 2 white wires for the heater element and the black wire is the signal wire... Somebody correct me if I'm wrong. Any chance I might be able to get a parts list and/or instructions to build one of these meters? =)
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When something breaks, do not replace it... Upgrade it! |
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12-17-2002, 09:36 PM
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Join Date: Jun 2001
Location: Baltimore Md, USA
Posts: 347
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John, Thats impressive. I would like to make my own as well. Is it possible to get a parts list?
Ross |
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12-17-2002, 11:12 PM
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Registered
Join Date: Oct 2002
Location: Loveland, CO
Posts: 610
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yes, i will get you guys the wiring diagram for it and the parts needed, it cost me a total of 9 dollars i think because you have to buy a special led driver chip. But i reprogrammed my computer and lost all of the favorites, i will look around though and send you the parts list and the diagram on how to solder it all together. Its pretty neat, you know the led's that light up on the real ones you buy, there are 10 little bars? well its just like that but not in the circle gauge, you can mount just the little rectangle with the 10 leds anywhere you want, it would even fit in the vdo gauge cluster somewhere! i'll let you guys know when i find the information. Thanks
John |
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12-18-2002, 06:32 AM
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Registered
Join Date: Jun 2001
Location: Baltimore Md, USA
Posts: 347
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Thanks John, Thats great. I look foreward to checking it out.
Ross |
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12-18-2002, 10:05 AM
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Registered
Join Date: Dec 2002
Location: Richmond, VA
Posts: 484
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You have it hooked up correctly. Try connecting a digital volt meter to the O2 sensor lead. Set the meter to read 2 volts DC, start the engine and let it come up to temperature.
As the engine warms up, the meter should start to indicate a voltage close to 0.50 volts DC. As the engine runs this voltage should vary or dither high and low across 0.50 volts. If the voltage does not dither, disconnect the O2 sensor from the DME and read the sensor output. It should be just below 0.50 volts. To check this, read the DME side of the O2 sensor connector. With the sensor disconnected, the DME side should have about 0.451 volts. This is a default "rich" setting. This voltage is used to insure the fuel/air mixture is always rich when a valid O2 sensor output is not available. If you don't get good readings from the O2 sensor, pop over to Pep Boys, AutoZone or where ever and ask for a BOSCH #11051 3-wire O2 sensor. Costs about $30.00. Has a Ford connector. Cut the connector off and splice the new sensor onto the existing O2 sensor wires. black is signal, white is 12 volts for the heater. Hope this helps. Cliff Hipsher '84 944 Sobel Metallic '87 944 India Red
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Cliff Hipsher '87 944 India Red '86 951 Kalahari Metallic |
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12-19-2002, 04:34 AM
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