I have done voltage check on a ETC and readings on 5 volt reference wire is 5 volt unplugged and 1,5 V cold and hot it is 450mv ground wire is 0,028V ground lead on multimeter is connected to battery ground. I guess it is voltage drop I am reading on the 5V reference wire and I guess the cold reading is to low and hot engine in spec.
The car is a Audi 100 1988 1,8 litre and problem is to much HC and sooty spark plugs.
New 02 sensor. It is a TBI Bosch type injection and has no MAP or MAF only TPS that calculate air intake. TPS has two pot and no glitch one is from 2-5V and second pot is 0-5V.
Question is if I am measured the ETC the right way and the problem is in the ETC.
[Last edited May 20, 2016 14:28:59]