EXPERINCING VACUUM LEAKS ON MY 1969 JEEP WAGONEER

Asked by Apr 24, 2012 at 02:24 AM about the 1969 Jeep Wagoneer

Question type: Maintenance & Repair

PERIODICALLY THE ENGINE WILL SHOW A VACUUM LEAK - ESPECIALLY AFTER WARMING UP

2 Answers

13,235

Sounds like possibly an intake leak, but here is a good reference for vacuum trouble shooting.......... You should get between 17-22 in. hg. depending on your elevation above 2000 feet MSL or mean sea level. To perform this test hook vacuum gauge directly to manifold vacuum. 1. Low steady needle usually indicates leaky intake, a leaky vacuum hose, late timing, or incorrect camshaft timing. 2. If reading is 3-8 inches low and fluctuates at that low reading suspect an intake manifold gasket leak at intake port or faulty injector. 3. If the needle has regular drops of about 2-4 in hg. at a steady rate the valves are probably leaking. (Perform a compression check). 4. An irregular drop or down flick of the needle can be caused by a sticking valve or an ignition misfire. 5. A rapid vibration of about four in hg. indicates worn valve guides. 6. Slight fluctuation of one inch or so indicates ignition problems. 7. Large fluctuation perform a compression check. 8. If needle moves slowly through a wide range check for PCV issues. Hope this gives you a good place to start and helps you figure it out.

3,725

there are also vaccum hoses. check the hoses and see if one is loose, or off. vaccum hoses will cause a vaccum leak.

Your Answer

Jeep Wagoneer Experts

  • #1
    Tom Demyan
    Reputation
    80
  • #2
    a2881541
    Reputation
    50
  • #2
    tuff4x4
    Reputation
    50
View All

Related Models For Sale

Used Jeep Cherokee
353 Great Deals out of 50,739 listings starting at $1,995
Used Jeep CJ5
31 listings
Used Ford Mustang
606 Great Deals out of 36,201 listings starting at $1,800

Used Cars For Sale

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.