Loud Whistling noise! please help

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Nov 16, 2020 | 08:55 AM

#16

msteiny

Newbie

Joined: Oct 2015

Posts: 3

Likes: 0

Model: Cherokee

I think I found it.

I had the same problem with my 2000 XJ. Could never figure it out, vacuum gauges, starting spray, brake cleaner, nothing would point to the source of the whistle. I just lived with it as embarrassing as it was.

Changed out my injectors and it went away briefly, Changed the fuel pump and its gone for good now. must be some weird low pressure restriction that makes it whistle.

plenty cold here in North Dakota so its been an ongoing issue.

Hope this helps.

Nov 17, 2020 | 07:37 AM

#17

downs

CF Veteran

Joined: Oct 2018

Posts: 1,096

Likes: 166

From: Hunt County Texas

Year: 1995

Model: Cherokee (XJ)

Engine: 4.0L

Quote:

Originally Posted by TrevorNelson

Alright guys! I have figured it out. Well, My mechanic did, he replaced the Idler Pulley (which makes perfect since) and it hasnt whistled yet!

Good. Cheap fix. If you can get the old idler pulley back and have a new bearing put in it. Or do it yourself. I have my original MOPAR pulley on the shelf now as a spare. Bearing cost me a few bucks and about 2 minutes of my time to press the old one out and new bearing in.