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strx7 wrote:wideband has 5 wires or more.
3 & 4 wire sensors are heated narrow band sensors
B0000M wrote: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?
tim_blair wrote:thanks for the info
is there any advantage of using a 4wire instead of a 1 wire
sergei wrote:B0000M wrote: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 wrote: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?
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