Low vacuum psi

[Tommy92]

Two days ago my vacuum gauge started to read ~5psi. I know that's not normal. It used to always be around 25 at idle. When I'm in neutral and rev the engine the car hesitates to bring the rpm back to idle for a split second. I recorded this.

There is nothing wrong with the car either. Runs strong, idles smooth, not throwing codes, and doesn't stall.

Here is a video http://youtu.be/h3xxiLNMwUQ

Hope someone can help me out.

 

[ademily87]

Probably a very small vacuum leak. The slightest little thing can knock your vacuum pressure down.

 

[Tommy92]

Any tips on finding the bugger?

 

[ttocs]

start feeling yer lines up and see if its a big enough leak to feel.

 

[sn95jones]

I'd start on what ever lines are clamped on, most of the time the clamps slowly tear away the hose over the years, can't tell you how many car's I've had this issue. You'd be surprised how little the hole can be to cause such a huge issue

 

[MustangChris]

FYI: thats inches of mercury, not PSI (In Hg)

 

[Tommy92]

Thanks guys, I'm going to check for cracked lines and do a carb cleaner test tomorrow.