Hissing sound right around fuel regulator

[nightfire]

I'm getting a fairly loud hissing sound at idle on my KLZE coming from right around where the fuel rails start (basically near the regulator). Is this normal, or a vacuum leak on the IM?

[hgallegos915]

if its idling ok, its normal, if its not, vac leak.

[mazdanut08]

Check for Vacuum leaks, I had a similar sound and I thought the same thing wouldnt idle right if there was a vacuum leak and it took me 2 days of looking to actually figure out i had a whole line that wasnt connected.

[nightfire]

Check for Vacuum leaks, I had a similar sound and I thought the same thing wouldnt idle right if there was a vacuum leak and it took me 2 days of looking to actually figure out i had a whole line that wasnt connected.

Well, where it's hissing I can't see anything disconnected. :/ I wonder if the intake is leaking at the gasket.

It seems to idle OK, but somewhat rough. Could that be normal for a fidanza flywheel?

[Mnemonic]

take some carb and choke or brake cleaner, slowly spray in different spots in the engine bay, if your rpms rise well then you know there is a leak, if it idles slightly rough then you have a vacuum leak more or less

[nightfire]

take some carb and choke or brake cleaner, slowly spray in different spots in the engine bay, if your rpms rise well then you know there is a leak, if it idles slightly rough then you have a vacuum leak more or less

Wow.. good idea. I'll try it tonight.