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rav4 2000 Quad Digital EFIE
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berial Offline
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Post: #1
rav4 2000 Quad Digital EFIE
hi
I have Quad Digital EFIE on my car I have only one oxygen sensor 1.8 VVTI 1zz-fe RAV 4 2000' japan
[Image: 20130501215750.jpg]

PWM I got old model

[Image: 20130501215812.jpg]


(20 amp max. i don't know what frequency I have )

[Image: 20130501215834.jpg]


question is what's the settings for IFIE ? down and up stream ?
I start from 150 and 300

in future I planning change dryer


any one have experience with that engine ?
(This post was last modified: 05-01-2013 01:47 PM by berial.)
05-01-2013 01:25 PM
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mike Offline
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RE: rav4 2000 Quad Digital EFIE
We've definitely had success with Rav 4s before. I don't recall what years.

The US versions of that engine all use wide band sensors. The quad digital is for narrow band oxygen sensors. I'm pretty sure the Japanese version will be the same.

In the US, they use 1 x wideband upstream sensor and 2 x narrow band downstream sensors. The quad wideband has 2 wideband and 2 narrow band EFIEs in one unit. That's the one you want.

Actually, first verify the voltages from the front sensor. Measure the voltage on each wire while the engine is running. You'll need a sharp probe so you can pierce the insulation of the wires and get a measurement. If the signal wire (or all of the wires) is above 2 volts then you know you have a a wideband sensor.

Contact shipping@fuelsaver-mpg.com about an exchange.

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05-02-2013 08:56 AM
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berial Offline
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RE: rav4 2000 Quad Digital EFIE
that is my connector for oxygen sensor
measurement results one site - then I have reding results
white cable 3.7 mv
blue cable voltage is from 0.085 up to 0.830 mv
black 13.97 v
black 338 mv

one site +
white 14.4V
blue 14.02V
black 154 mv
black 13.79V




locate here [Image: oxygensensor.jpg]

I try find other one but I have only one
(This post was last modified: 06-19-2013 04:41 AM by berial.)
05-03-2013 04:38 AM
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mike Offline
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RE: rav4 2000 Quad Digital EFIE
The downstream sensor is definitely narrow band. The problem is that the upstream sensor also reads like a narrow band sensor. Are you sure of your measurements? These were taken while the engine was running and the sensor was plugged in?

If so, its narrow band. Which surprises me. All Toyotas of that year are made with wide band sensors in the US. But all wires are above 2.5 volts in a Toyota wide band sensor.

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05-09-2013 02:59 PM
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berial Offline
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RE: rav4 2000 Quad Digital EFIE
(05-09-2013 02:59 PM)mike Wrote:  The downstream sensor is definitely narrow band. The problem is that the upstream sensor also reads like a narrow band sensor. Are you sure of your measurements? These were taken while the engine was running and the sensor was plugged in?

If so, its narrow band. Which surprises me. All Toyotas of that year are made with wide band sensors in the US. But all wires are above 2.5 volts in a Toyota wide band sensor.

I have only one sensor and it's narrow one where I stick the cable upstream or downstream ? it's from Japan bring to England and now I drive in Ireland Wink
(This post was last modified: 05-10-2013 12:10 PM by berial.)
05-10-2013 12:07 PM
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LittleGreenDot Offline
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RE: rav4 2000 Quad Digital EFIE
2000 Toyota Rav 4 only used wideband sensors in California. You have narowband for sure. It looks like it's your downstream sensor though. If you have another one it will be under the hood on the exhaust manifold. Check under any heat shields you might have.
05-13-2013 01:54 PM
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berial Offline
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RE: rav4 2000 Quad Digital EFIE
Mike sorry that take so long
but I organise oscilloscope

could you help me understand graph ?

here is with HHO on EFIE my reading for test point is:
-Digital 127
-Analog 262

osciloscope setup for 1s/DIV 200mV AC

[Image: graphhho.jpg]

without hho
[Image: graphpetrol.jpg]



tomorrow I will be testing on motorway that give better accuracy on graph.
(This post was last modified: 05-24-2013 01:20 AM by berial.)
05-24-2013 01:17 AM
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mike Offline
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RE: rav4 2000 Quad Digital EFIE
That looks like a narrow band oxygen sensor signal. But really, it doesn't tell us anything other than that.

It is possible that those sensors are old because of the highs and lows not being very high or low. How many miles do you have on them?

What else are you trying to figure out from this?

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05-25-2013 09:30 AM
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berial Offline
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RE: rav4 2000 Quad Digital EFIE
(05-25-2013 09:30 AM)mike Wrote:  That looks like a narrow band oxygen sensor signal. But really, it doesn't tell us anything other than that.

It is possible that those sensors are old because of the highs and lows not being very high or low. How many miles do you have on them?

What else are you trying to figure out from this?

I'm not sure what value I need setup on EFIE. to get better results
How many miles do you have on them? 180K miles on clock
I don't know how many miles I make per gallon
results show only on LCD from original radio witch I don't have
(This post was last modified: 05-26-2013 03:07 AM by berial.)
05-25-2013 11:38 PM
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mike Offline
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RE: rav4 2000 Quad Digital EFIE
o2 sensors are good for about 80K miles. You'll need to change yours out. It is a commonly missed maintenance item.

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05-26-2013 11:37 AM
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