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Old 12-04-2006, 01:28 PM   #1
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Lean/Rich fuel monitor ...

Hello -

(This Jaycar outfit originates from Australia)

I was toodling around and found these A/F fuel sensor kits :

"Digital Fuel Mixture Display Kit for Cars"
http://www.jaycarelectronics.com/pro...Max=&SUBCATID=


I am going to get this gizmo if you guys think it's good, because I would like to see the lean/rich mixture, versus inferring it from other indicators. Here's the low-tech version :

"Mixture Display Kit For Fuel Injected Cars"
http://www.jaycarelectronics.com/pro...Max=&SUBCATID=


Here are some other goodies :

"Smart Fuel Mixture Display for Fuel injected Cars"
http://www.jaycarelectronics.com/pro...Max=&SUBCATID=

"LED Duty Cycle Meter for Fuel Injected Cars"
http://www.jaycarelectronics.com/pro...Max=&SUBCATID=

"Economy Adjustable Temperature Switch"
http://www.jaycarelectronics.com/pro...Max=&SUBCATID=

"Digital Fuel Adjuster"
http://www.jaycarelectronics.com/pro...Max=&SUBCATID=

"Hand Controller for Digital Adjusters"
http://www.jaycarelectronics.com/pro...Max=&SUBCATID=

"Universal High Energy Ignition Kit"
http://www.jaycarelectronics.com/pro...Max=&SUBCATID=

"SC2 Project - Sound Like a Dalek"
http://www.jaycarelectronics.com/pro...Max=&SUBCATID=



(Matt, maybe this is an advertising oppurtunity ... Ramsey electronics too?)

CarloSW2
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Old 12-04-2006, 04:23 PM   #2
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I have personal experience assembling 5 of the Jaycar WideBand O2 kits. Nicely packaged and went together well. just make sure that you are good at soldering and have the proper power supply to calibrate the kit after it's assembled.
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Old 12-04-2006, 04:34 PM   #3
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These kit's look to me like they are just a specialized voltmeter, measuring the voltage coming from the Oxygen Sensor. You can just use a voltmeter to read the voltage from the sensor to ground, and get the same information. 0.5 volt's is what the ecu shoot's for, but I generally see it go between 0.3 and 0.8, which is about 12:1, up to about 18:1.

I didn't see any wide band kit listed on their site. Additionally a wideband sensor generally run's between $180 and $360, by itself.
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Old 12-05-2006, 12:48 AM   #4
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I worked at Jaycar and helped them set up their operation on the west side of Australia back in the early 90's.

I (and others) pushed for the development of these fuel mixture monitor kits.



They do operate as a volt meter of sorts that displays the voltage of the o2 sensor., which is quite logical because that is its output.(what did you expect?)

A normal digital voltmeter averages the display which can make viewing the output of the sensor inacurate.

The o2 kit shows it as it happens.

Later kits (which I was not involved with) I believe had a pic chip in them ..I dont know how good/or bad they work.
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Old 12-11-2006, 03:02 PM   #5
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onegammyleg -

Thanks, I got the digital A/F meter, the high range temp switch with LCD, and the Dalek voice kit. Seeing the A/F ratio will give me more car-oh-feedback so I can prove/disprove the Hot Air Intake for myself. I like the high temp switch because I can use it in lots of different ways:

1 - Create a switch for HAI temp control.
2 - Before / After engine block temp readings to see if the HAI is putting my engine at risk.
3 - Creating an alarm for my wife's pottery kiln.

I got the Dalek voice to scare the cats.

You will OBEY!!!

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