1999 wj Laredo weird whistle
03-09-2017, 12:49 PM
#1
Newbie
Thread Starter
Join Date: Mar 2017
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
1999 wj Laredo weird whistle
I have a 1999 jeep wj Laredo with the 4.0 with a strange whistle coming from under the vehicle, not in the engine bay. Any ideas. Took this video of the noise. https://www.youtube.com/watch?v=MB9IGPOkIpo
03-09-2017, 02:04 PM
#3
Seasoned Member
Join Date: Apr 2011
Location: 4 Corners, USA
Posts: 263
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2000
Model: Cherokee
Engine: 4.0 I-6 Cyl. w/ 0630Head+MikeWilsonAdapter (preserves engine/brain function w/ stronger head) 62mmTB
Not in the engine bay... When does it happen, and not happen? When the vehicle's moving, when it's under acceleration? When it's stopped, idling, etc.
Which side does the sound come from, or does it sound like it's underneath?
Which side does the sound come from, or does it sound like it's underneath?
Last edited by '00 XJ; 03-09-2017 at 02:10 PM.
03-09-2017, 02:54 PM
#4
Newbie
Thread Starter
Join Date: Mar 2017
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
It is coming from right underneath towards the rear axle-ish area. Happens when engine is idle or when I am coasting, when I am driving it straight up just disappears.
03-09-2017, 03:15 PM
#5
Seasoned Member
Join Date: Apr 2011
Location: 4 Corners, USA
Posts: 263
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2000
Model: Cherokee
Engine: 4.0 I-6 Cyl. w/ 0630Head+MikeWilsonAdapter (preserves engine/brain function w/ stronger head) 62mmTB
Thanks. Sorry, I couldn't hear the video, where I am it's terrifically bright and windy, and I can only stop for a bit.
03-09-2017, 03:19 PM
#6
Newbie
Thread Starter
Join Date: Mar 2017
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
03-09-2017, 08:48 PM
#7
Old fart with a wrench
I'm just guessing here, but could the tailpipe be dented just enough to act like an organ pipe? As in resonate at just the right flow?
Trending Topics
03-09-2017, 09:05 PM
#8
Newbie
Thread Starter
Join Date: Mar 2017
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
I never thought of a dent, I'll have to take a look tomorrow. But it seems to happen very sparatically recently every day, but before it was maybe once a week... so it's not every time just a majority.
03-10-2017, 01:40 AM
#9
Old fart with a wrench
The only other thing I can think of, if it's the exhaust, is a loose muffler baffle.
03-10-2017, 07:30 AM
#11
Newbie
Thread Starter
Join Date: Mar 2017
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
03-10-2017, 07:31 AM
#12
Newbie
Thread Starter
Join Date: Mar 2017
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
03-10-2017, 04:17 PM
#13
Newbie
Thread Starter
Join Date: Mar 2017
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Update: so mainly can hear it from the rear. Very random when it occurs sometimes when it's hot, sometimes when it's cold... also I can hear it slightly better from the rear of the vehicle on the side opposite of the exhaust. Could be from just the absence of exhaust noise. Any ideas? Looked for any obvious cracks, dents, ect... nothing too obvious so might have to take a closer look.
03-13-2017, 09:31 PM
#14
Newbie
Thread Starter
Join Date: Mar 2017
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Anymore ideas anyone? Also does anyone know if exhaust leaks are very expensive as I have never looked into it and have never needed exhaust work on any of my previous vehicles.
03-13-2017, 09:50 PM
#15
Member
Join Date: Sep 2016
Posts: 137
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
I don't know but, maybe it's the electric fuel pump in the gas tank or even the gas cap vent whistling. Try taking the fuel cap off with the motor running and see if anything changes.