Vacuum leak tested question

[delorean928]

When I connect a smoke machine I try to disturb as little as possible so I get an accurate test. I take off the air cleaner box, cover the air inlet for the mixture unit and pump into the crankcase vent hose. With the air filter box off I can get a better look at the top of the motor.

That's what I did too. I found a leak at the mixture adjust screw cause I had no plug. I found another leak at the oïl filler cap assy and I changed the big O-ring around it. I also found a leak at an an injector seal. I planned and ordered 6 to change them all. I'll also change the O-ring around the air inlet so the engine will tale air only from the right place thru the air filter.
Beside that everything is fine.

[Trstno1]

Does someone have a video showing how to test for vaccum leaks on our cars? Maybe something showing where to introduce the smoke into the system?

[David T]

Does someone have a video showing how to test for vaccum leaks on our cars? Maybe something showing where to introduce the smoke into the system?

There are many ways to do the same thing. I remove the air cleaner, seal the air intake and push the smoke in through the oil vent hose.

[Trstno1]

There are many ways to do the same thing. I remove the air cleaner, seal the air intake and push the smoke in through the oil vent hose.

You do that without the engine running right?

[David T]

You do that without the engine running right?

Correct, this is a static test. Hard to keep the motor running when you seal the intake.

[Trstno1]

Correct, this is a static test. Hard to keep the motor running when you seal the intake.

haha....right