i will be switching out these crappy bosch sensors for the NTK japanese ones

after watching some diagnostic videos , the ntk sensors switch to closed loop after 32 seconds even when engine is still cold

soooo i am going to be the guinea pig this time around

 

well after 90 minutes trying to dis-connect the passenger side o2 sensor connector without success

i am farming this job to i mechanic i know , he has replaced ranger sensors before , he uses sensor extensions

 

the new NTK oxygen sensors are installed

mechanic had a hell of a time with the passenger side connector , it was some what weld to the other connector . they had to break the o2 sensor connector into pieces .

the slightly erratic idle is back , this is good because it tells me that the new O2 sensors are sending correct data back to the ECM

i will report back in few days in regards to fuel economy with these new japanese sensors installed

 

well i have to report that these new NTK sensors are just the cats meow

although you have to let the engine for 30 minutes using 91 octane fuel

my mileage has shot back up to around where it used to be 620 kms per tank, and it is still going up

the CON-- is that the sensors only like esso 91 octane fuel without ethanol

ethanol when combusted turns to oxygen , which the sensor reads as the engine is running lean

 

nothing in this thread makes sense

 

 

some members were reporting decreased mileage .

that is because as i said earlier , the factory sensors are bosch and are easily damaged by any type of moisture in the exhaust flow ( aka ,, fuel injection cleaners )

unless the product specifically states OXYGEN SENSOR safe

i am getting better mileage now with the NTK sensors than i have ever did with the factory bosch sensors

 

You keep making wrong statements, just stop now before it gets any worse.

Oxygen sensors sit in an environment which has an ambient temperature much lower than the exhaust that flows over them when a vehicle is running. When you take a (relatively) colder surface and put hot gases near it it causes condensation. - Just like pulling a can of coke from the fridge on a warm summer day. If water (condensation) gets on the sensing element it can damage it. It has nothing to do with fuel injection cleaner. This is the primary reason when I weld in a sensor bung I always do so with the sensor at the 12 o'clock position. Water does not run uphill.

If you have better mileage from changing your sensors it dosen't mean "bosch sensors are crappy", it may indicate you had a faulty sensor.

A thread that read "Hey I had a problem with fuel mileage and I changed my oxygen sensors, it seems to have fixed it - anyone know why?" would be more appropriate.

please refrain from making any type of scientific statements of what is wrong, because honestly - it's obvious that you have quite a bit to learn. (just being honest)

 

WRONG!!!

why do think that oxygen sensors have built in pre-heaters , because the sensors needs to be heated quicker than the exhaust gas when the engine is started and warming up

i have spent over 8 hours reading various articles on oxygen sensors .

and the main concensus is that the bosch sensors are crap

heck even mechanics in germany switch german cars over to japanese oxygen sensors

 

The heater circuit serves 1 main function, being the resistance is inversely related to temperature (it behaves as an NTC) and with a malfunctioning heater the sensor will not be able to pull the reference voltage down close to zero. As a result the sensor can not switch accurately without being warmed up. The quicker this can be achieved, the quicker the vehicle can manage the pulse-width by adjusting the STFT and reduce pollution.

heater circuits with ceramic elements that get wet with condensation can instantly kill the sensing element, how do I know? (I messed this up once myself)

You have 8 hours reading about oxygen sensors.

I have 12 years of professional tuning experience installing and tuning cars with them, 3 years of OEM engineering experience along with 2 engineering degrees. You may be more qualified to speak on them though

I use bosch oxygen sensors on my personal cars (including my race car) and recommend them on the cars I work on.

I see no real difference in NTK vs Bosch - both are OEM name brand with OEM quality.

 

I invented the oxygen sensor, I have to agree with cheese_man on this one,if that's what works in his truck,that is what it is,you have 2 degrees and your a mechanic I take it,if I had 2 degrees I wouldn't be working on cars