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[Nick W]

You use carb cleaner to narrow down where to look for vacuum leaks, by gently spraying it around inaccessible joints. If the rpms rise, that's where to investigate further.

This isn't necessary for checking the multirams, or heater solenoids etc, as you can easily remove the short lengths of rubber hose that join the nylon pipes and examine each of them for damage. The rubber hose is readily available, and cheap so dealing with any issues is straightforward. Nylon pipe is used in air systems, so isn't difficult to source either.

[Webby the Bear]

Fair enough lads..... could have sworn I saw a vid on using water though 

 

[tidla]

Fair enough lads..... could have sworn I saw a vid on using water though 

 

That was for fixing your puncture on your bmx.

[chrisgixer]

Carb cleaner evaporates very quickly as it's designed to. The vapour is flammable. Once drawn in through any vacuum leak it combusts in the cylinder and the revs increase. Spray it in the right place and the revs go up, you know the induction system has a leak.


In practice the leak needs to be prety severe for it to work ime. So an audible hiss is often a bigger clue.

Carb cleaner is clear. So could be mistaken for water. I suppose.

[omega3000]

Fair enough lads..... could have sworn I saw a vid on using water though 

 

That was for fixing your puncture on your bmx.