Best way to find a vacuum leak

[steven_esi_bui]

What would be the best way to find a vacuum leak on a 420a. I'm sorry for the noob question but I'm not that familiar with these engines.

 

[VelocitàPaola]

No different from how you'd find a vacuum leak in any other engine...

How to Find a Vacuum Leak - Smoking Out Vacuum Leaks - Popular Mechanics

 

[2slow4now]

I've used just plain old WD-40 before. Works pretty much the same as carb cleaner just not as flammable.

Concentrate on connection points, tight bends, or any place the lines may have rubbed on.

A side benefit is it will protect your rubber parts and plastic parts in the engine compartment. It also loosens up crud so its easier to wipe off and detail or if you have a clean engine compartment it makes clean up later easier because of a thin layer of oil under the crud.

Don't spray it on belts, alternator, exhaust, and don't hose down electrical connectors.

 

[steven_esi_bui]

Thanks guys for the quick replies. And I'll try that wd-40. Any specific places to look at for a leak?

 

[Sychotix]

Check all the vacuum lines around the intake manifold and around your throttle body. Try to listen for the hissing noise. A buddy of mine was smoking a cigarette and blew it over the motor. The smoke seeped into one of the lines and found out I had a cracked EGR line. So I snatched it out and plugged it up.