1. Welcome to Jeeps.net!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Jeep discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Jeep owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

YJ having trouble starting

Discussion in 'Wrangler YJ (1986-1995)' started by faston2whlz, Sep 11, 2016.

  1. Sep 11, 2016 at 3:15 PM
    #1
    faston2whlz

    faston2whlz [OP] Member

    Joined:
    Sep 11, 2016
    Member:
    #201
    Messages:
    13
    Gender:
    Male
    First Name:
    patrick
    Vehicle:
    1995 Wrangler Sahara
    3" with 33's
    Just picked up a 1995 YJ Wrangler with the 4.0 and a manual transmission. The thing ran great on the test drive but the day after I bought it, I noticed it was hard to start a couple times and now it won't start at all. Cranks over great but doesn't fire at all.

    I put new plugs, rotor, cap and a coil and that did no good. I shot gas directly into the intake and she never fired once.I am almost positive it is electrical issue somewhere. Looks like it's been beat on in the past but that wasn't an issue with me as it ran and shifted just fine. Distributor maybe?

    I just had a problem with a Honda civic and the symptoms are identical.....cranks over fine but no fire and a new distributor fixed that up. Are the distributors an issue with these 4.0's?
     
  2. Sep 11, 2016 at 3:50 PM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine Moderator

    Joined:
    Jul 19, 2016
    Member:
    #2
    Messages:
    3,341
    Gender:
    Male
    Welcome! I would pull a spark plug, and see if its making any spark.
     
  3. Sep 11, 2016 at 5:50 PM
    #3
    faston2whlz

    faston2whlz [OP] Member

    Joined:
    Sep 11, 2016
    Member:
    #201
    Messages:
    13
    Gender:
    Male
    First Name:
    patrick
    Vehicle:
    1995 Wrangler Sahara
    3" with 33's
    it didn't even try to start when I poured fuel directly into the butterfly....it would have at least fired if there was any spark. I thought maybe someone else had this issue with these 4.0's
     
  4. Sep 12, 2016 at 8:13 AM
    #4
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    759
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    ^^^^^^^^
     
    chris4x4 likes this.
  5. Sep 16, 2016 at 9:47 AM
    #5
    faston2whlz

    faston2whlz [OP] Member

    Joined:
    Sep 11, 2016
    Member:
    #201
    Messages:
    13
    Gender:
    Male
    First Name:
    patrick
    Vehicle:
    1995 Wrangler Sahara
    3" with 33's
    found out it's the ECM.......where do you guys get em when you need one????? HELP!!!!
     
  6. Sep 16, 2016 at 10:03 AM
    #6
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    759
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    I have never had to purchase one but your local auto parts store should have something.

    Autozone has remanufactured units as does Rock Auto and most local and on-line parts houses.

    New ones can be painful. If you are after new you might want to check with your local dealer.

    Make sure you match the OEM part number from your current one to make sure you get the right one for your engine/tranny combo.

    Hope this helps. Good luck!!
     
  7. Sep 16, 2016 at 12:45 PM
    #7
    faston2whlz

    faston2whlz [OP] Member

    Joined:
    Sep 11, 2016
    Member:
    #201
    Messages:
    13
    Gender:
    Male
    First Name:
    patrick
    Vehicle:
    1995 Wrangler Sahara
    3" with 33's
    I've been on the phone for hours and I'm gonna have to let a company off ebay repair it as nobody has these things for a 95 and older. I don't know why but that is the cutoff year for getting a new or remanufactured one. Apparently Autozone can still get you one but they are $300 bucks for a new one. Gonna go the $99 ebay repair route first. I'll keep you posted.
     
  8. Sep 16, 2016 at 1:08 PM
    #8
    faston2whlz

    faston2whlz [OP] Member

    Joined:
    Sep 11, 2016
    Member:
    #201
    Messages:
    13
    Gender:
    Male
    First Name:
    patrick
    Vehicle:
    1995 Wrangler Sahara
    3" with 33's
    Just a little FYI.....Rock Auto is out of stock on the Wrangler ECMS. P/N ending in 836
     
    Bob likes this.
  9. Sep 16, 2016 at 2:15 PM
    #9
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    759
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    Thanks for sharing the info!!
     
  10. Dec 27, 2016 at 3:06 AM
    #10
    YJ Noob

    YJ Noob Member

    Joined:
    Dec 27, 2016
    Member:
    #702
    Messages:
    6
    Gender:
    Male
    Vehicle:
    1994 Wrangler Sahara L6
    How did you find out it was your ECM?

    I just bought my first jeep a 94 Wrangler, picked it up for 1500 bucks not running. Trying to breathe life back into it. I checked the two wire plug going into the ignition coil and got the 12 V constant and 11.75 V strobe. I replaced the ignition coil, wires, distributor cap, rotor and plugs and no spark. Any thoughts?
     
  11. Dec 27, 2016 at 7:33 AM
    #11
    faston2whlz

    faston2whlz [OP] Member

    Joined:
    Sep 11, 2016
    Member:
    #201
    Messages:
    13
    Gender:
    Male
    First Name:
    patrick
    Vehicle:
    1995 Wrangler Sahara
    3" with 33's
    I finally had it towed to a mechanic friends shop where he diagnosed the issue. He had the equipment to find the problem otherwise I would still be throwing parts at it.
     
  12. Dec 27, 2016 at 7:40 AM
    #12
    YJ Noob

    YJ Noob Member

    Joined:
    Dec 27, 2016
    Member:
    #702
    Messages:
    6
    Gender:
    Male
    Vehicle:
    1994 Wrangler Sahara L6
    You had them fix your old one for 100 bucks and it worked out ?
     
  13. Dec 27, 2016 at 8:49 AM
    #13
    faston2whlz

    faston2whlz [OP] Member

    Joined:
    Sep 11, 2016
    Member:
    #201
    Messages:
    13
    Gender:
    Male
    First Name:
    patrick
    Vehicle:
    1995 Wrangler Sahara
    3" with 33's
    Yes, I sent mine to them and whatever they did fixed it. It's been starting and running perfectly ever since. It was only a 5 day turn around. They're the biggest one on eBay. I sent it out to Colorado Springs. I'll get the name for you
     
  14. Dec 27, 2016 at 9:05 AM
    #14
    faston2whlz

    faston2whlz [OP] Member

    Joined:
    Sep 11, 2016
    Member:
    #201
    Messages:
    13
    Gender:
    Male
    First Name:
    patrick
    Vehicle:
    1995 Wrangler Sahara
    3" with 33's
    SIA Electronics. 800-737-0915. If the ECM is the problem they can hook you up
     
    chris4x4 likes this.
  15. Dec 27, 2016 at 9:56 AM
    #15
    YJ Noob

    YJ Noob Member

    Joined:
    Dec 27, 2016
    Member:
    #702
    Messages:
    6
    Gender:
    Male
    Vehicle:
    1994 Wrangler Sahara L6
    Appreciate the info thanks man
     
To Top