320k mile filter change...

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Mar 22, 2026 | 07:49 AM

John T

Thread Starter

Seasoned Member

Joined: Jan 2010

Posts: 400

Likes: 42

From: Oxford, CT.

Year: 1998

Model: Cherokee (XJ)

Engine: 4.0

320k mile filter change...

320k miles and 28 years .... I never even knew this filter existed !

blew it off with compressed air and put it back in.

We will revisit this in another 100k miles or so.....

Mar 22, 2026 | 09:27 AM

Saudade

CF Veteran

Joined: Aug 2020

Posts: 2,109

Likes: 576

From: SoCal

Year: 1988

Model: Cherokee (XJ)

Engine: 4.0L

Yep, Fuel Vapor Vent filter for the LDP.

Mar 22, 2026 | 06:20 PM

bluejeep2001

CF Veteran

Joined: Dec 2016

Posts: 1,722

Likes: 399

From: Long Island, New York

Year: 2001

Model: Cherokee (XJ)

Engine: 98 stroked 4.7

Wow, My 2001 has 355k and never knew either...will pop that can open next time I get some free time. I wonder if clogged keeps evap msg away? Thanks for the info...did you open for a reason or just curiosity...

Mar 23, 2026 | 07:15 PM

jpz

Senior Member

Joined: Jul 2013

Posts: 522

Likes: 99

From: PA

Year: 2000

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by bluejeep2001

My understanding of the how the EVAP system works is, a clogged component will produce the check engine light as quickly as a leaking component. I read this while chasing an EVAP leak of my own for a couple seasons.

Last edited by jpz; Mar 23, 2026 at 07:17 PM. Reason: I wasn't happy with my first draft

Mar 25, 2026 | 06:21 PM

John T

Thread Starter

Seasoned Member

Joined: Jan 2010

Posts: 400

Likes: 42

From: Oxford, CT.

Year: 1998

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by bluejeep2001

Thanks for the info...did you open for a reason or just curiosity...

I was looking at the sticker on the firewall and it occurred to me... Filter??? what filter....

popped the cover and what do you know..... really wasn't that dirty..... minor dust and crud on one side.