User Tag List

Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Engine not Idling, dies after 10 seconds if throttle not being pushed.

  1. #1
    Junior Member michael.abken's Avatar
    Join Date
    Oct 2008
    Location
    White Salmon
    Posts
    265

    Branch
    Army National Guard
    Status
    Retired
    Served
    1996 to Present

    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default Engine not Idling, dies after 10 seconds if throttle not being pushed.

    So, I have been having this issue for awhile. My 99 2.5l, won't idle. I have replaced, the distributor & rotor, wires, sparkplugs (all 3 2x in the last year), fuel pump, iac, tps, and replaced the tb gasket and cleaned the tb with tb cleaner.

    I start it and it will the idle fluctuates for a few seconds up and down then the idle plunges and the engine dies, also it sounds as if there is a lot of air being sucked in. If I press the accelerator and rev up the engine it finally revs decently, but as soon as I let release the accelerator the engine dies. I know it is getting fuel, because of fuel that comes out of the pressure release valve.

    Any ideas or recommendations would be helpful.
    SSG Mike Abken
    OIF twice now.
    '99 TJ, 4 Cyl., 3in lift.

    "I am not lost, I am exploring my surroundings."

  2. #2
    Time n Money Ghost00TJ's Avatar
    Join Date
    May 2008
    Location
    Missouri
    Posts
    9,121

    Branch
    Army
    Status
    Retired
    Served
    1986 to 2008

    Closest Installation

    Fort Leonard Wood
    Mentioned
    7 Post(s)
    Tagged
    0 Thread(s)

    Default

    almost sound like a vacuum leak, use some carb cleaner when it is running and spray along intake manifold where it meets the block and around any vacuum hoses one at a time. You should hear the idle change when the cleaner is sucked into the vacuum lines or manifold. That is where the leak is.
    F'it, aint my Jeep!
    Beer does a Jeep Good

  3. #3
    Junior Member
    Join Date
    Oct 2008
    Location
    Colorado Springs
    Posts
    463

    Branch
    Marine Corps
    Status
    Served
    Served
    1980 to 1984

    Closest Installation

    Fort Carson
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Getting fuel is not the same as getting the correct pressure at the rail. You really need to check the pressure with a known good Gas Pressure Gauge.

    Check engine light on? If so, what are the codes being reported?
    http://zhvac.webs.com/

    9/11 - WE WILL NEVER FORGET!! (<---<<click)

  4. #4
    darwinism at its best irish1371's Avatar
    Join Date
    Jun 2008
    Location
    St. George
    Posts
    1,333

    Branch
    Marine Corps
    Status
    Served
    Served
    1996 to 2002

    Closest Installation

    Yokota AB
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)

    Default

    an old fuel pump will cause a piss poor idle, never had one kill it like yours yet, but not saying it couldn't be the cause

    Also need to check the exhaust and cat. I have seen crushed exhaust pipe do this.
    blocked or broken up cats can cause idle issues but usually they get cherry red hot you smell em and throw a code

    just a thought, how is your battery voltage?
    Last edited by irish1371; 03-27-2010 at 23:06. Reason: sp
    "Some people wonder their whole lives if they will ever make a difference. Marines don't have that problem." Pres. Ronald Reagan
    Army vs Marines = http://www.youtube.com/watch?v=_2M7ckkxQLU

  5. #5
    "Rock Hound" Joe Roberts's Avatar
    Join Date
    Apr 2009
    Location
    Ishpeming, Mi
    Posts
    194

    Branch
    Navy
    Status
    Retired
    Served
    1982 to 2005

    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Could also be the throttle position sensor, had a 97 that did pretty much the same as you describe and that was the culprit.

  6. #6
    aussie locked 03Sahara's Avatar
    Join Date
    Jan 2008
    Location
    Mineral, Va
    Posts
    334

    Branch
    Army National Guard
    Status
    Serving
    Served
    1997 to Present

    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    dont forget the 02 (oxygen) sensior it can do the same thing
    Evil is allowed to triumph in the world only when good men stand by and do nothing.....Edmund Burke

  7. #7
    MODERATOR warrior's Avatar
    Join Date
    Jun 2009
    Location
    USA
    Posts
    3,810

    Branch
    Army
    Status
    Retired
    Served
    1965 to 1968

    Mentioned
    23 Post(s)
    Tagged
    0 Thread(s)

    Default

    Sound like your air valve sensor at the TB(Clean the carbon out)
    Also check your coolant temp sensor(radical idle)
    If you don't give up---You will never fail.



    8th Combat Engineers (Sapper) (Vietnam 66)


  8. #8
    Wheelin requires wrenchin Doppler's Avatar
    Join Date
    Jan 2010
    Location
    Newcastle
    Posts
    2,695

    Branch
    Air Force
    Status
    Retired
    Served
    1990 to 2010

    Closest Installation

    Tinker AFB
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)

    Default

    Pull the O2 sensor in front of the cat out and see if it stays idling. If it does your cat is becoming blocked and will need to be replaced. This will not always set a code in the computer. If it remains running make sure you secure the sensor up to something so it will not fall and bang around or melt the insulation on the wires. You can drive it a short distance to a muffler shop to have the repair done. Expect it to be loud while your driving. Hope this helps.

  9. #9
    Junior Member michael.abken's Avatar
    Join Date
    Oct 2008
    Location
    White Salmon
    Posts
    265

    Branch
    Army National Guard
    Status
    Retired
    Served
    1996 to Present

    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Sorry for not getting back to you guys in over a week, family vacation to see family we haven't seen in 5 years.

    Ghost:
    We tried spraying the manifold with carb cleaner, no change. I haven't tried the vacuum lines yet.

    FrankZ:
    how should I do that? I have the chiltons manual and since it doesn't show really good my engine (no real help) since my fuel pressure regulator is out back on top of the internal pump. Check engine light isn't on due to me disconnecting the battery during my changing of iac, tps, and tb gasket.

    Irish:
    Fuel pump is about a year old, just replaced the internal filter in january roughly. Battery voltage seems good.

    We are going to try the O2 sensor to day. Would the MAP sensor mess it up also?
    SSG Mike Abken
    OIF twice now.
    '99 TJ, 4 Cyl., 3in lift.

    "I am not lost, I am exploring my surroundings."

  10. #10
    Junior Member
    Join Date
    Oct 2008
    Location
    Colorado Springs
    Posts
    463

    Branch
    Marine Corps
    Status
    Served
    Served
    1980 to 1984

    Closest Installation

    Fort Carson
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    There's a schrader fitting on the fuel rail. Simply unscrew the cap and screw the hose from the tester on to it.
    http://zhvac.webs.com/

    9/11 - WE WILL NEVER FORGET!! (<---<<click)

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Get the MJ Supporter Membership for a little less than $0.06 a day and get more space, 2 MJ Stickers and no banners ads. [Check it out]