Results 1 to 12 of 12

Thread: 1994 yj wont start need advice!

  1. #1
    Join Date
    Apr 2010
    Location
    singhampton,ont
    Posts
    7
    Time Online: 8 Hrs 57 Mins 49 Secs
    Avg. Time Online: 1 Secs
    Rep Power
    8

    1994 yj wont start need advice!

    i have a 1994 jeep yj 2.5l i just bought a month ago i was informed it needed a computer and has been sitting for 2 years i get the jeep home got a used computer and found out the fuel pump was gone bought a new fuel pump and filter and now it trys to start maybe revs up to 1000 rpm for a split second than dies thought it wouldent hurt either to get new plugs wires cap and rotor and still the same thing checked timing, fuel pressure, injector pulses and everything checks out cleaned throttle body and made sure there was compression and all the valves were opening and that checks out aswell i just dont know what else i can do your advice would be awsome thanks!

    Frank

  2. #2
    Join Date
    Feb 2009
    Location
    Living out of Jeep between Toronto to Owen Sound
    Posts
    2,470
    My Mood
    Tired
    Time Online: 5 Mths 1 Wk 2 Days 12 Hrs 46 Mins 9 Secs
    Avg. Time Online: 13 Mins 9 Secs
    Rep Power
    11
    Throwing any codes?


    If you manually feed it fuel will it run?

  3. #3
    Join Date
    Apr 2010
    Location
    singhampton,ont
    Posts
    7
    Time Online: 8 Hrs 57 Mins 49 Secs
    Avg. Time Online: 1 Secs
    Rep Power
    8
    no codes and nothing i do will get this thing to start

  4. #4
    Join Date
    Feb 2009
    Location
    Living out of Jeep between Toronto to Owen Sound
    Posts
    2,470
    My Mood
    Tired
    Time Online: 5 Mths 1 Wk 2 Days 12 Hrs 46 Mins 9 Secs
    Avg. Time Online: 13 Mins 9 Secs
    Rep Power
    11
    Air, fuel, spark. Those are the basics to run.

    Do you have spark?
    if yes then you should be able to get a spray bottle with some gas and get it to fire over unless the timing is screwd. If it does run with a spray bottle then you have some fuel/fuel delivery issue.

  5. #5
    Join Date
    Apr 2010
    Location
    singhampton,ont
    Posts
    7
    Time Online: 8 Hrs 57 Mins 49 Secs
    Avg. Time Online: 1 Secs
    Rep Power
    8
    ive tryed that and to me it seems like it floods like doesent even try to fire when i do that i checked timing twice just to be sure and that checks out now it does have nice blue spark when it turns over but could it be the coil like it sparks blue when it just at atmospheric pressure but could it fail under a compression stroke pressure , could that give me a problem like i have? other people have brought up that the computer might need re flashed but in my eyes that could be a possibility but i figure that it is less likey problem because it came out of a jeep with the same displacment engine , fuel, spark would be the same i would figure.

  6. #6
    Join Date
    Jun 2005
    Location
    Burlington
    Posts
    5,009
    Time Online: 1 Mth 3 Wks 5 Days 8 Hrs 29 Mins 23 Secs
    Avg. Time Online: 4 Mins 38 Secs
    Rep Power
    18
    Nah, it's unlikely that it needs a different computer.

    Checking for spark, if it'll jump 3/4" in open air it should run under compression. I do this test at a spark plug wire. If it wont jump at least 1/2 inch I'll do the maintenance items there.
    For fuel I agree with Craven's suggestion. Use starter fluid to give the engine a fuel source that doesn't rely on the pump & injectors. It'll also fire with a weaker spark than gasoline
    ....-Noltz
    '91 Frankenheep Edition. 4.0, 4" BDS, Richmond 8.8, 35" KM2's, Titan 12k, ... gone.
    '95 4Runner SR5. Air-Lift bags, OBA & 8K Winch, DD... gone.

  7. #7
    Join Date
    Apr 2010
    Location
    singhampton,ont
    Posts
    7
    Time Online: 8 Hrs 57 Mins 49 Secs
    Avg. Time Online: 1 Secs
    Rep Power
    8
    ok i checked the spark once again tonite and it clears 1/2 inch no problem , but i try to start it say with the gasoline spray bottle and nothing happens just seems to flood so it must be that the timing is messed up but i dont understand how because on compression stroke on #1 cylinder once the stroke hits tdc the rotor is pointing right at cylinder #1 plug wire? am i missing somthing?

  8. #8
    Join Date
    Apr 2010
    Location
    singhampton,ont
    Posts
    7
    Time Online: 8 Hrs 57 Mins 49 Secs
    Avg. Time Online: 1 Secs
    Rep Power
    8
    no its accual gasoline fresh in a spray bottle , i never really was told to use quickstart on any engine but at this point i dont know what else to do

  9. #9
    Join Date
    Feb 2009
    Location
    Living out of Jeep between Toronto to Owen Sound
    Posts
    2,470
    My Mood
    Tired
    Time Online: 5 Mths 1 Wk 2 Days 12 Hrs 46 Mins 9 Secs
    Avg. Time Online: 13 Mins 9 Secs
    Rep Power
    11
    You have the firing order correct and not just what the previous owner had? cap to plugs
    badass tj " Hey bro I would really like 2 grab tht rear end."

  10. #10
    Join Date
    Apr 2010
    Location
    singhampton,ont
    Posts
    7
    Time Online: 8 Hrs 57 Mins 49 Secs
    Avg. Time Online: 1 Secs
    Rep Power
    8
    yup looked online for the firing order and double checked from stamping on the intake manifold

  11. #11
    Join Date
    Feb 2009
    Location
    Living out of Jeep between Toronto to Owen Sound
    Posts
    2,470
    My Mood
    Tired
    Time Online: 5 Mths 1 Wk 2 Days 12 Hrs 46 Mins 9 Secs
    Avg. Time Online: 13 Mins 9 Secs
    Rep Power
    11
    Distributor shaft can also be out 180 degrees.

  12. #12
    Join Date
    Apr 2010
    Location
    singhampton,ont
    Posts
    7
    Time Online: 8 Hrs 57 Mins 49 Secs
    Avg. Time Online: 1 Secs
    Rep Power
    8
    how could the distributor shaft be out 180 degrees if the rotor is bang on?

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •