O2 sensor

[tim_blair]

how can you tell the difference between a wide band o2 senor and a narrow band one?

what is the dif betwen a 4-wire o2 sensor and a single wire?

[thegreatestben]

More wires = heated.

Ways to tell difference between narrow and wide band = cost

[tim_blair]

i am aware that the 4-wire ones have heating

im goin to get a second hand one from pikapart for my bike project im not worried about accuracy just so that i can moniter my fuel ratio

[Py7h0n]

I would never use anything from pick a part to monitor my AFR - Cheap project or not :p

[strx7]

wideband has 5 wires or more.
3 & 4 wire sensors are heated narrow band sensors

[matt dunn]

wideband has 5 wires or more.
3 & 4 wire sensors are heated narrow band sensors

Thats what I though too,

but there is a Bosch Wideband 4 wire sensor, a motorsport special.

Have fitted them to Motec dash's on NZV8 touring car for mixture logging.

But in reality most are 5 wire and expensive,
and need a controller (or ECU) to run them.

[1hypo3]

Toyota use "air / fuel sensors" on late model vehicles which are linear 5v wideband 4 wire sensors
the only way to be sure is to check the output voltage to the ecu as toyota also use 1v narrow oxygen sensors 4 wire also
if a vehicle is fitted with a linear sensor it is always before the cat and oxygen sensor is after the cat
Most aftermarket linear 5v sensors are 5 wire and you need a lambda controller to interpret the information

[B0000M]

do you know what kind of sensors ST215's have? theres a 4 wire sensor just beside the turbo

[sergei]

do you know what kind of sensors ST215's have? theres a 4 wire sensor just beside the turbo

Narrow Band.

[B0000M]

thanks. and how do we confirm if this is working correctly - ive put my multimeter on it and found the wire that has the 0-1v range on it, and it jumps around anywhere from 0-.9v as the car idles whilst warm.

i have my doubts that it is working correctly though because the car produces black smoke when you accellerate at low revs - eg not on boost. to me this looks like its running really rich, and also if you stand near the car even at the front while its running you get that woft of smell of unburnt fuel.

is there anything else i should be checking for mixture related issues?

[sergei]

thanks. and how do we confirm if this is working correctly - ive put my multimeter on it and found the wire that has the 0-1v range on it, and it jumps around anywhere from 0-.9v as the car idles whilst warm.

i have my doubts that it is working correctly though because the car produces black smoke when you accellerate at low revs - eg not on boost. to me this looks like its running really rich, and also if you stand near the car even at the front while its running you get that woft of smell of unburnt fuel.

is there anything else i should be checking for mixture related issues?

Yes it works correctly, count how many times it changes that value in 10 seconds time period, if it does 8 or more than it is fine.

As for high load conditions, the ECU generally discards current data from O2.
It will probably compensate for knock with poor fuel (do you run 98?).

[tim_blair]

thanks for the info

is there any advantage of using a 4wire instead of a 1 wire

[1hypo3]

thanks for the info

is there any advantage of using a 4wire instead of a 1 wire

only if youre worried about emissions the heater circuit warms the sensor faster which gives it a quicker response

[B0000M]

thanks. and how do we confirm if this is working correctly - ive put my multimeter on it and found the wire that has the 0-1v range on it, and it jumps around anywhere from 0-.9v as the car idles whilst warm.

i have my doubts that it is working correctly though because the car produces black smoke when you accellerate at low revs - eg not on boost. to me this looks like its running really rich, and also if you stand near the car even at the front while its running you get that woft of smell of unburnt fuel.

is there anything else i should be checking for mixture related issues?

Yes it works correctly, count how many times it changes that value in 10 seconds time period, if it does 8 or more than it is fine.

As for high load conditions, the ECU generally discards current data from O2.
It will probably compensate for knock with poor fuel (do you run 98?).

yeah always use bp 98.

got any more ideas on things to check?

[tim_blair]

i just want a rough idea of what my mixture is doing

i have both a 4 wire and a 1 wire

[sergei]

you mean you have both on the car?
if it is factory setup the one wire sensor is probably just a cat. overheat warning sensor .

[ChaosAD]

You can get the bosch wideband oxy sensors as used with the innovate gear for about $120 new on trademe.
Youll need a wideband sensor controller though.

The innovate lc1 is about $350 including sensor

[tim_blair]

no no im putting 1 on my motorbike, it currently doesnt have 1
and i have one of each but want to know what is more likely to give me a better readout

[steve murch]

how can you tell the difference between a wide band o2 senor and a narrow band one?

what is the dif betwen a 4-wire o2 sensor and a single wire?

the cheapest and easyist wideband youll find is on the comodore ecotech v6,it runs two of them
two wires for heater and voltage return and 0 earth,but you have to run 14.5volts to make them work or they dont give a good reading.

[Leiden]

So the ecotech O2 is effectively a wideband oxygen sensor without the need for a wideband controller?

Is it just 4 wire? Two for heater and two for oxygen signal and oxygen signal earth?