How do I check for a vacuum leak on a 2004 3.7 liberty, code says it could be a vacuum leak for rich bank 2

40

Asked by Mrvic Dec 01, 2016 at 02:03 PM about the 2004 Jeep Liberty

Question type: Maintenance & Repair

I have a 2004 3.7liberty. I keep getting a rich bank code and only one plug is
fouling. Code says it could be a vacuum leak on the intake manifold, how to I
see where the vacuum leak could be?

3 Answers

A Vacuum leak should make it run lean, not rich. If you look for loose or cracked vacuum hoses you might find a leak but I don't think that is your problem. I would suspect a leaking fuel injector in the cylinder with the fouled plug.

4 people found this helpful.
40

Turned out it was a dropped valve seat. I did a compression test and that was how I figured it out. Just a heads up to anyone else with the same issue.

4 people found this helpful.

Your Answer:

Liberty

Looking for a Used Liberty in your area?

CarGurus has 25 nationwide Liberty listings starting at $5,900.

Postal Code:

CarGurus Experts

  • #1
    rst429
    Reputation
    3,100
  • #2
    fixmyjeep
    Reputation
    3,010
  • #3
    Gene Arnett
    Reputation
    1,970
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Jeep Wrangler
144 Great Deals out of 5,930 listings starting at $8,995
Used Jeep Grand Cherokee
121 Great Deals out of 3,487 listings starting at $4,950
Used Ford Escape
140 Great Deals out of 3,929 listings starting at $3,995
Used Toyota RAV4
111 Great Deals out of 2,857 listings starting at $2,949
Used Toyota 4Runner
20 Great Deals out of 517 listings starting at $6,825
Used Honda CR-V
157 Great Deals out of 4,953 listings starting at $440
Used Nissan Xterra
29 listings starting at $7,799
Used Ford F-150
363 Great Deals out of 12,802 listings starting at $599
Used Toyota Tacoma
43 Great Deals out of 684 listings starting at $9,975

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.