m3dim

iTrader: (1)

Hi

I have a 1993 JDM WRX fitted with a Bosch LS04 3-wire lambda sensor. When I measure the voltage across it, it reads a fairly constant 3v. A bit confusing since it should only read between 0 and 0.9v. When I rev it, it will go down to about 2.9v. Any ideas as to why its reading 3v??

Thanks

Glowplug

iTrader: (8)

Because it's ****'d??

I have the same MY and use a LS02 3 wire??

turboaddict

iTrader: (2)

well said

Glowplug

iTrader: (8)

Just had a look at just lambda and they only recommend the LS01 and the LS02 for 1 and 3 wires respectivly. You may have the wrong sensor fitted

Just a thought, you are taking the voltage from the 'signal' wire and not across the heater - (neg) and +(pos).

m3dim

iTrader: (1)

Yes taking voltage from the signal wire. I looked on here and from previous posts Scott.t says either LS02 or LS04 is fine and they are both 3 wire sensors???

Glowplug

iTrader: (8)

Saw the same post earlier, after i'd posted
Can only suggest it's fudged.

Petbeemer

volts should swing fairly rapid when rev'd, it the volt's are slow to change then it's buggered anyhow, 2 types of common lambda make sure it's the correct type