What do I all need to clean the throttle body? 2014 Tahoe

[Doubeleive]

Ok and the cheapest way? What’s back flow test?

Gee what camera? a noodle camera?

ya just a inspection camera to look at the honeycombs inside to see if it melted or not.
a backpressure test is done with a fitting on the 02 sensor port with a hose and gauge there are youtube videos around that show how it is done

 

[swathdiver]

The car will be a dog with a clogged cat. With a dead cat the downstream O2 sensor will move like the upstream sensor.

 

[iboughtatahoe23]

ya just a inspection camera to look at the honeycombs inside to see if it melted or not.
a backpressure test is done with a fitting on the 02 sensor port with a hose and gauge there are youtube videos around that show how it is done

Saw that video, have to drill a hole :/ not sure how I feel about that. Won’t that make exhaust leak worse?

 

[iboughtatahoe23]

The car will be a dog with a clogged cat. With a dead cat the downstream O2 sensor will move like the upstream sensor.

How can I study this on the PID banks on my scanner? How they “move”, I think I asked this already. Please excuse me if I did.

How should the graphs look?

 

[Doubeleive]

Saw that video, have to drill a hole :/ not sure how I feel about that. Won’t that make exhaust leak worse?

No you use the 02 sensor bung, drilling a hole is not going to help anything lol

 

[iboughtatahoe23]

No you use the 02 sensor bung, drilling a hole is not going to help anything lol

I saw a video where a guy drilled a hole before the cat to take the pressure with a gauge.

 

[Doubeleive]

I saw a video where a guy drilled a hole before the cat to take the pressure with a gauge.

There is a hole already where the sensor mounts

 

[swathdiver]

How can I study this on the PID banks on my scanner? How they “move”, I think I asked this already. Please excuse me if I did.

How should the graphs look?

You can just look at the numbers or run a graph. The upstream sensors should move up and down constantly once warmed up. The downstream sensors don't move much, change position with different throttle positions and stay put pretty much. If a downstream sensor moves like an upstream sensor, that's the sing of a bad cat.

There are lots of videos on youtube showing this.

 

[Doubeleive]

Cleaned mine today it's not even dirty a few smudges, I keep it clean though

 

[Doubeleive]

Cleaned the maf also