multimeter challenge.
11-24-2009, 06:35 PM
#1
0.0 BAR
Thread Starter
Join Date: Nov 2009
Location: t.c. minnesota
Posts: 14
multimeter challenge.
i know this idea is possible and maybe routine for people on this site. i want to use my fluke meter as a air/fuel meter on my 4.0 jeep. can any body tell me how to go about this?
i mean i would like it to display the air ratio. i guess that would require probing the correct wire and zeroing the meter at a specific volts or somthing?
i mean i would like it to display the air ratio. i guess that would require probing the correct wire and zeroing the meter at a specific volts or somthing?
11-25-2009, 08:00 AM
#3
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Join Date: Nov 2009
Location: t.c. minnesota
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i know
but thats what any body can do. i want to learn how to turn my multimeter into an afr gauge any time. that would be very cool. and cheap in the long run!
11-25-2009, 10:10 AM
#4
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Join Date: Nov 2009
Posts: 6
there is no way to do it and have it show readings that you can use. the stock sensor is useless for anything other than what the ecu uses it for. they are really just an on off switch and while it would show you various voltages while driving, they fall in to a very small window of a useless air/fuel range.
getting a sensor that can read something useful is also just as pointless cause you have to have a controller for them. they need to be heated to a specific point and no amount of putting voltage to it manually will get you there.
so, in short. get a JAW from 14point7.com and program it to run a cheap narrow band gauge from the parts store. or watch it with your multi-meter if thats what you really want to do. i personally dont like to work that hard and would opt for the gauge
getting a sensor that can read something useful is also just as pointless cause you have to have a controller for them. they need to be heated to a specific point and no amount of putting voltage to it manually will get you there.
so, in short. get a JAW from 14point7.com and program it to run a cheap narrow band gauge from the parts store. or watch it with your multi-meter if thats what you really want to do. i personally dont like to work that hard and would opt for the gauge
11-25-2009, 11:13 AM
#5
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Join Date: Nov 2009
Location: t.c. minnesota
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another idea
i thought" since o2 sensor use electricity to communicate with the ecu mabey a multimeter could give me a useable volt or amperage? i found a write up after i searched around. check out www.autospeed.com/A_109878/cms/article.html
the problem i heard is the speed with which a multimeter works isnt fast enough. but this dude did it so mabey some one with some jeep/mopar specific experience might be able to help me. mabey theres a way to tap into the ecu for the reading instead of the o2 sensor?
the problem i heard is the speed with which a multimeter works isnt fast enough. but this dude did it so mabey some one with some jeep/mopar specific experience might be able to help me. mabey theres a way to tap into the ecu for the reading instead of the o2 sensor?
Last edited by cherokeebuilder; 11-25-2009 at 11:17 AM.
11-26-2009, 03:12 AM
#6
1.5 BAR
Join Date: Jan 2006
Posts: 779
i thought" since o2 sensor use electricity to communicate with the ecu mabey a multimeter could give me a useable volt or amperage? i found a write up after i searched around. check out www.autospeed.com/A_109878/cms/article.html
the problem i heard is the speed with which a multimeter works isnt fast enough. but this dude did it so mabey some one with some jeep/mopar specific experience might be able to help me. mabey theres a way to tap into the ecu for the reading instead of the o2 sensor?
the problem i heard is the speed with which a multimeter works isnt fast enough. but this dude did it so mabey some one with some jeep/mopar specific experience might be able to help me. mabey theres a way to tap into the ecu for the reading instead of the o2 sensor?
11-27-2009, 04:10 PM
#8
0.0 BAR
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Join Date: Nov 2009
Location: t.c. minnesota
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11-27-2009, 05:15 PM
#9
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Join Date: Feb 2007
Location: Floresville Tx
Posts: 236
DLC- diagnostic link connector scanner... code reader... what ever you want to call it. The tool you buy that plugs into your 16 pin connector under your dash. OBD2 connector unless you have an older vehicle. What did you do to a cherokee that you need to tune for?
11-27-2009, 05:18 PM
#10
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Join Date: Feb 2007
Location: Floresville Tx
Posts: 236
O2 sensor and Air Fuel sensor is two different things and you don't tune with a o2 sensor. up at the top you put air sensor so what sensor are you talking about... sounds like o2. Why dont you just get a nice o2 sensor off ebay for like 30 bucks and put it someplace in your car.
