LT1 sucks when shut down
Thread Starter
Le Mans Master
Joined: Feb 2002
Posts: 7,858
Likes: 2
LT1 sucks when shut down
I am just wondering if this is normal: My '95 has always made a sucking sound as it shuts down at key-off. Sort of a "Shooooooooop..." suction like sound comes from the engine bay, possibly from fuel rail or fuel pressure regulator but I can't really pinpoint it other than it sounds like a liquid-induced sound. Duration is only about a second or two and it sounds like pressure equalization, but: happens when air conditioning is not running, electric emissions air pump is off also.
It makes the sound right at moment when the engine has spun-down and piston movement has stopped, sounds like. Like the moment the crankshaft stops moving.
Maybe I'm being over-analytical.
I was just wondering if anyone else's does this or not, and if not could this be the fuel pressure regulator acting up?
It makes the sound right at moment when the engine has spun-down and piston movement has stopped, sounds like. Like the moment the crankshaft stops moving.
Maybe I'm being over-analytical.
I was just wondering if anyone else's does this or not, and if not could this be the fuel pressure regulator acting up?
Race Director
Joined: Oct 2002
Posts: 13,717
Likes: 5
From: RI
Since I changed my air intake to a vortex I hear it every time. Never heard it in the stock air cleaner. It is normal to hear if your looking for it. I say the engine is still pretty tight......
Chris
Chris
