Vacuum Leak

[Docktour Z]

So it appears my car may have a vacuum leak. I recently installed a JLT CAI and a JLT oil separator. What's the best way to track down my leak? I had sent Bama my logs and the tuner said he sees I am running lean at idle but that clears up as RPM's build indicating a vacuum leak. I read that I can spray starter fluid or some other liquid around each connection and hear the idle raise up which means that is where the leak is at.

 

[blownGTvert]

Your exactly correct in your troubleshooting method. Carb cleaner works well for finding vacuum leaks.

 

[Docktour Z]

Will it leave any residue? I was also thinking that maybe I could blow smoke over the possible areas with a cigar to see if it sucks in.

 

[JeremyH]

No it wont leave a residue it is quickly vaporizes. Carb choke cleaner is quick and easy and what I have always used, works great. Let the car idle and spray different areas and when the car idle stumbles you have found it.

 

[blownGTvert]

Make sure to post a video of the cigar method! LMAO.

 

[Docktour Z]

Lol I have no problem trying it and making myself look like a fool. I'll report back.

 

[Docktour Z]

huh...no leaks...no stumbling and I sprayed all the vacuum hoses down...what would I look for on a log to see a vacuum leak?

 

[wbt]

Remove said parts and see if the problem still exists.

 

[eighty6gt]

huh...no leaks...no stumbling and I sprayed all the vacuum hoses down...what would I look for on a log to see a vacuum leak?

I have never been able to detect a leak with carb cleaner, etc... even when I create a large leak and try to test the method.

Vac leaks are shitty to track down, usually you just have to go over everything and check each connection. There aren't that many. And in this case you're probably just checking your CAI and your separator hoses - not pulling the intake manifold.

 

[Fullboogie]

NVM. Didn't read the original post correctly.