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Old 03-18-2020, 01:00 PM
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Default How to do Vacuum leak test LP550 - Where is an easy to access vacuum line?

Hi everyone, I have some high idle code that I believe is a vacuum leak. Can anyone guide me in the right direction where and how I should test. Or should I just spray the smoke randomly around hoses and see where the smoke gets sucked in?

I bought one of those cheap paint can looking smoke makers for this specific purpose.

Last edited by imjohnphan; 03-18-2020 at 03:02 PM.
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Old 03-19-2020, 12:37 PM
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Quote:
Originally Posted by imjohnphan View Post
Hi everyone, I have some high idle code that I believe is a vacuum leak. Can anyone guide me in the right direction where and how I should test. Or should I just spray the smoke randomly around hoses and see where the smoke gets sucked in?

I bought one of those cheap paint can looking smoke makers for this specific purpose.
I've always just used carb/choke cleaner when the car is still cold and listen for the idle change. It's a little old school and can go wrong if the car is too hot, but everything in the engine bay is designed to handle high heat, so doable if you're careful and have an extinguisher handy.
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Old 03-19-2020, 01:44 PM
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Hi thanks for the advice. I actually found the leak and it was straight up the elbow connector after the vacuum tank (3 spherical looking thing) was completely disintegrated. Since looking at the lines I noticed that it lead to what could possibly be the lines for the exhaust valves so I thought good just plug it up and we're good. What I forgot was that that vacuum line branches somewhere afterwards and I didn't know where but now I am getting a P2404 code which I is something to do with fuel EVAP or something and I am feeling as though that branch off after the vacuum tank goes to that fuel area.
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