Weird noise when I let off the gas

M

mamhpremier

NAXJA Forum User

Location

San Diego

• Nov 21, 2015

• #1

I drive a 1992 4.0l xj with a manual transmission. When I accelerate up to about 2500rpm and then let of I get a weird noise from the center of my engine compartment. Sounds like something is rattling. I also have a lifter tick but the noises are very different. There is a video of the sound here https://youtu.be/bXGyzZRdwI8

 

M

mamhpremier

NAXJA Forum User

Location

San Diego

• Nov 21, 2015

• #2

Sorry about the road noise, hope you can still hear it.

 

Talyn

NAXJA Forum User

Location

Radford, Communistwealth of Virginia

• Nov 23, 2015

• #3

Can't hear it on the video. Unless you are talking about that single metallic click.

 

W

wyowalsh

NAXJA Forum User

Location

wyoming

• Nov 29, 2015

• #4

have you checked driveshaft U-joints ?
possible transmitting noise up to engine area ?

 

M

mamhpremier

NAXJA Forum User

Location

San Diego

• Nov 30, 2015

• #5

The metallic noise was my keys but directly after that is the noise. I accelerate then at 5 seconds I let off and it almost sounds like a flopping piece of thin metal, definitely coming from engine not U-joints

 

T

truckeejeeper

NAXJA Forum User

Location

Northern California

• Dec 1, 2015

• #6

Make another vid without your keychain. And do it for a bit longer. Cant make out anything.

I think I know the noise though. I have 1991 5speed. Have never pinpointed it. Like a lever or cable related to the throttle that hangs loose and rattles when you let off the gas. Really love to identify it.

 

T

truckeejeeper

NAXJA Forum User

Location

Northern California

• Jan 1, 2016

• #7

Did you ever pinpoint this sound. Have same on my '91. Sounds like its coming from under the front passenger side. Differntial? I have the vacuum disconnect d30.

'91 sport 4.0 5speed.

 

O

outlander

NAXJA Forum User

Location

Columbus,Ohio

• Jan 5, 2016

• #8

Any other symptoms?
Clutch chatter?
Rough engagement or disengagement?
Could be throwout bearing related or broken pressure plate dampener spring but cant hear anything in vid

 

C

cp2295

NAXJA Forum User

Location

Washougal, WA

• Jan 5, 2016

• #9

Well i had similar symptoms in my 4.0 v6 ranger (ohv motor) where id be in gear, 2500 rpms or higher and letting of the throttle or very light load in hear it would rattle from the engine, ended up pulling the motor to find that all my rod journals were shot and the valvetrain was severely worn.. A rebuild took care of my noise. Whats your oil pressure sitting at? And sorry i cant hear anything in that vid.