Is this hissing noise normal?
Thread Starter
|
Mountain Pass
Joined: Jun 1999
Posts: 102
Likes: 0
From: Pennsylvania
Is this hissing noise normal?
First of all I am new to Diesels. I am getting near the end of doing an Oil cooler, EGR delete, Blue Spring, Stand pipes, and dummy plugs on my 2005. I have everything back together and read somewhere to cycle the key on and off 3 times before trying to start. When i do that I hear a hissing noise that sounds likes its coming from the fuel bowl. .
Its not real loud but it is noticeable. I have no idea if that noise was there before or not. I am acutely aware of anything leaking, weird noise anything after doing this major job over the course of a few days. After a few seconds the fuel pump shuts off and the hissing noise fades away. I assume that means what ever pressure or check its looking for is reached. I don't see any leaks anywhere. Is this just fuel running through the system? I haven't tried to start the truck yet. Thought i would what to hear from the experts about this noise.
Thanks!
Its not real loud but it is noticeable. I have no idea if that noise was there before or not. I am acutely aware of anything leaking, weird noise anything after doing this major job over the course of a few days. After a few seconds the fuel pump shuts off and the hissing noise fades away. I assume that means what ever pressure or check its looking for is reached. I don't see any leaks anywhere. Is this just fuel running through the system? I haven't tried to start the truck yet. Thought i would what to hear from the experts about this noise.
Thanks!
Logistics Pro
Joined: Dec 2004
Posts: 4,138
Likes: 7
From: South Weber, Utah
You should be fine, you are just hearing the fuel pump pushing the air out of the system. I just did the blue spring in a friend of mines truck and happened to be near the engine when he keyed the ignition to the on position and I could hear it pushing the air out of the system and then I could hear it bypassing fuel once it got the air out.
Cargo Master
Joined: May 2006
Posts: 2,116
Likes: 6
From: Florida
I had my fuel pressure gauge when I did mine, it took more than 3 key cycles to purge all the air, when the gauge started to register proper pressure you could hear the sound change at the same time. I think I could go just by the sound now, just wait till you hear the sound change and it should be purged. It will also take a lot of cranking to fill the Hpop reservior with oil.don't get scared just keep cranking under 30 sec intervals at a time until it fires .
Thread
Thread Starter
Forum
Replies
Last Post
shark1979
1999 - 2003 7.3L Power Stroke Diesel
3
Jul 12, 2010 08:23 PM
briank
1997 - 2006 Expedition & Navigator
4
Sep 30, 2009 09:36 PM
shark1979
1999 - 2003 7.3L Power Stroke Diesel
10
Jun 24, 2009 08:02 PM
