Symptoms of bad O2 Sensor

[Moppie]

Originally Posted by UncleBob

so....you still wrestling with #7 & 8 plugs?

any resolution?

He pulled all 4 plugs out, now he's trying to figure out why it still runs......

[KiwiBacon]

Originally Posted by UncleBob

As for the runnability issue: Depends on the vehicle. Some computers are more stupid than others, and will blindly adjust the fuel trim based on the O2 readings, and have no decent method for verifying the O2 is working properly. On those vehicles, they can definitely get the fuel trim so far off that it causes misfires.

A workmate did an engine swap in a Nissan ute. Put the 3.0 V6 in.
The auto electrician wired the O2 sensor in wrong, and the truck ran for about a month at 5:1.

It actually put out an orange cloud when revved off idle.

You guys do realise that UK gallons are bigger than US gallons (4.54 litres versus 3.6 litres)?

[2.2 Straight six]

Originally Posted by UncleBob

so....you still wrestling with #7 & 8 plugs?

any resolution?

she had it fixed before i got there.

and when i talk about measurements to americans, i work in US measurements.

[moez1010@yahoo.com]

Yes Steven I agree it is not easy. Not like the real old days. Drop a littles gas in the carb. and see what happens. Now i guess it is the unplug it test. If things change then it probably aint it.

If a guy misses a couple days work messing around with it (-200) on a job that would have cost 175 then that person shouldnt be chaging a light bulb.

Unless; They just dont trust um. Like attorney's a few bad one's wreck it for all of um.

I can understand that and a person might say that the price is the reason vs I really dont trust you.

I fight the battles I can win. Wouldnt do a trans. Motor out. Not on your life.

Im learning the technical as I go along. On one engine on one car.
Some overlap from one car to the next and if I can pass something along great.

Steven in your estimation... What sensors whould be most sensitive to
heat? Should a car heat to almost overheating. O2 sensors being in the exaust would get pretty hot Perhaps one's in the block would be more prone to fail. What have you noticed over the 33 years in the biz?

I do know an electric fire (short) will cook all the thermal switches, idiot
lights, and coolant fan switches. (live and learn 86 Caravan)

If not heat alone. What about heat and then cooled quickly like perhaps
getting splashed from rain water or puddles.


Thanks Good luck