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Hissing sound right around fuel regulator
Posted: May 21st, 2008, 2:27 am
by 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?
Re: Hissing sound right around fuel regulator
Posted: May 21st, 2008, 2:43 am
by hgallegos915
if its idling ok, its normal, if its not, vac leak.
Re: Hissing sound right around fuel regulator
Posted: May 21st, 2008, 5:51 pm
by 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.
Re: Hissing sound right around fuel regulator
Posted: May 21st, 2008, 7:45 pm
by nightfire
mazdanut08 wrote: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?
Re: Hissing sound right around fuel regulator
Posted: May 21st, 2008, 7:46 pm
by 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
Re: Hissing sound right around fuel regulator
Posted: May 21st, 2008, 8:08 pm
by nightfire
Mnemonic wrote: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.
