so ive been getting lean codes for a while now. finally smoke tested brake booster after i figured out how.


vid here

https://photos.app.goo.gl/m6bcYiBAkDcFUzWk6

and the pipe i pumped full of smoke

https://photos.app.goo.gl/d34f2XW7WAuonKXn9

i assume i have to change out the brake booster and its been the cause of the vacuum. i did unplug it and plug the vacuum to plug the leak but the trims were still a bit funny. it might need adaptive trims reset tbf

Well done

Now I just need to learn to bleed brakes :p

You don’t need to.

If you loosen the ABS unit off it’s rubber mounts.
Unbolt the master cylinder 2 bolts it will swing out the way.
To allow booster to be changed once plastic shelf removed and pedal unclipped.

Ahh things are gonna get real interesting for me since I've got a busy plastic shelf, the lpg reducer and ecu lives their as well haha

It's split into 2 parts.

Can't remember if both parts need to come out

So changed everything out, turns out I had a non supercharger brake servo. But I did another smoke test before I installed it, no issues.

After installation smoke pours out the back the same way, am guessing it's not the problem then?

Humm.

I wonder if it’s because your blowing rather than sucking

I guess it needs a hole n the back to work





He cuts t open and the end and explains how it works

Aiye I watched both but I just assumed either way it'd be air tight :p I guess when it sucks it'll create an air seal

when the engine has been running for a bit, disconnect the vac pipe. It should hiss for a good few seconds (and loudly) if its good/new

My old one hissed for a second at best so I guess we'll see with this new one. Probably means backs to the drawing board on lean codes. Next up, lambda sensors replacement

I thought petrols used an electric pump on the passenger side to generate vacuum anyway ?
So what’s going on ? Where does the vac line go?

They do yeah, it has a vacuum pump does that mean that it won't affect the amount of oxygen going into combustion?

Am currently trying to still fix my lean codes, lambda sensors seem to be a good shout cause one banks fuel trims is double the others and I've tried all the conventional ways to check

Well I don’t understand how if you connected a smoke machine to the engine it came out the servo ?

i connected it to servo directly