Home made LS1 PCV Boot?
Thread Starter
TECH Fanatic
Joined: Jan 2022
Posts: 1,362
Likes: 256
Might have found the general area of the leak. I think the leak is going to be coming from somewhere around the TB because when the motor is turned off I hear a woosh of air coming from that area. I have another problem now though. I ran it kind of hard on the hwy (no WOT misfire) and when I got home the belt tensioner was knocking. If it wasn’t for the air noise as well I might guess a loose belt tensioner was causing the issues. It’s not supposed to make that air noise is it? Awhile back I took the TB off to clean it and I reused the old gasket. Also there’s this line that sticks into the drivers side of the intake near the TB that just kind of goes in and out but not all the way out. It can’t be that big of a leak though because the idle isn’t all that bad. Just a minute ago even with the tensioner knocking it was had a pretty steady idle.
Thread Starter
TECH Fanatic
Joined: Jan 2022
Posts: 1,362
Likes: 256
I think the leak is going to be coming from somewhere around the TB because when the motor is turned off I hear a woosh of air coming from that area. I have another problem now though. I ran it kind of hard on the hwy (no WOT misfire) and when I got home the belt tensioner was knocking. If it wasn’t for the air noise as well I might guess a loose belt tensioner was causing the issues. It’s not supposed to make that air noise is it? Awhile back I took the TB off to clean it and I reused the old gasket. Also there’s this line that sticks into the drivers side of the intake near the TB that just kind of goes in and out but not all the way out. It can’t be that big of a leak though because the idle isn’t all that bad. Just a minute ago even with the tensioner knocking it was had a pretty steady idle. Air sound near TB
Joined: Nov 2001
Posts: 34,632
Likes: 2,557
From: Schiller Park, ILL Member: #317
The belt tensioner noise isn't normal, but the "air whoosh" sounds pretty normal to me (basically sounds like mine, from what I can hear in the video).
That hard plastic line on the driver's side of the intake is for the EVAP system. It's sort of a strange quick-disconnect type deal, there is some play in it and that's normal.
Perhaps that re-used TB gasket was not in such great shape and might be leaking a little. Could also still be the PCV system (which you could just disconnect and temporarily cap off the system to check, see if the idle gets better, if you don't want to wait for a smoke machine or scanner).
That hard plastic line on the driver's side of the intake is for the EVAP system. It's sort of a strange quick-disconnect type deal, there is some play in it and that's normal.
Perhaps that re-used TB gasket was not in such great shape and might be leaking a little. Could also still be the PCV system (which you could just disconnect and temporarily cap off the system to check, see if the idle gets better, if you don't want to wait for a smoke machine or scanner).
Thread Starter
TECH Fanatic
Joined: Jan 2022
Posts: 1,362
Likes: 256
The belt tensioner noise isn't normal, but the "air whoosh" sounds pretty normal to me (basically sounds like mine, from what I can hear in the video).
That hard plastic line on the driver's side of the intake is for the EVAP system. It's sort of a strange quick-disconnect type deal, there is some play in it and that's normal.
Perhaps that re-used TB gasket was not in such great shape and might be leaking a little. Could also still be the PCV system (which you could just disconnect and temporarily cap off the system to check, see if the idle gets better, if you don't want to wait for a smoke machine or scanner).
That hard plastic line on the driver's side of the intake is for the EVAP system. It's sort of a strange quick-disconnect type deal, there is some play in it and that's normal.
Perhaps that re-used TB gasket was not in such great shape and might be leaking a little. Could also still be the PCV system (which you could just disconnect and temporarily cap off the system to check, see if the idle gets better, if you don't want to wait for a smoke machine or scanner).
Joined: Nov 2001
Posts: 34,632
Likes: 2,557
From: Schiller Park, ILL Member: #317
But either way, if it's making a knocking noise that's not normal and it should be replaced. Are you certain that the noise is coming from the tensioner though? Can't really be sure from just a video.
