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Starting Issues

Discussion in 'Wrangler YJ (1986-1995)' started by MacQ, May 17, 2020.

  1. May 17, 2020 at 8:14 PM
    #1
    MacQ

    MacQ [OP] New Member

    Joined:
    May 17, 2020
    Member:
    #4661
    Messages:
    2
    Gender:
    Male
    First Name:
    Mike
    Vehicle:
    Red 1991 YJ
    Hello all, new to this forum (but have been a lurker for a few weeks).

    My adult son purchased a 1991 YJ a few months ago. I think part of the reason for the purchase is that he likes this style of Jeep and wanted something he and I could work on together (some father and son time). The YJ has a rebuilt engine (2.5) with about 5000 miles on it. A friend of mine is a Jeep fan who did a build on a CJ5 in high school, a CJ7 several years ago, and is currently doing a build on a 95 YJ, and he gave my son some great advice of things to look for when buying an old YJ. Overall, the Jeep doesn't look bad for a vehicle that is 29 years old.

    A few weeks ago the YJ, while at an idle, just stopped running. Since then we have done the following:

    Test fuel pressure - None.
    Checked spark - Good.
    Used starting fluid - Will briefly run.
    Checked Fuses - Good.
    Checked Starter Relay - Appears to be good.
    Listened for the fuel pump to prime when the key is turned - Nothing.
    Dropped Fuel Tank - We will need a new skid plate (rust, big time).
    Checked for power going to fuel pump - Got it.
    Hooked 12V to fuel pump while in the tank - could not hear anything.
    Hooked 12 to fuel pump while out of the tank - It runs, but is soooooooo quiet.

    Not sure what to do now. Suggestions?

    Thanks!
     
  2. May 17, 2020 at 9:56 PM
    #2
    aggrex

    aggrex Well-Known Member

    Joined:
    Sep 12, 2016
    Member:
    #203
    Messages:
    3,738
    DE
    Vehicle:
    Backcountry '16
    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    Welcome @MacQ ....good detective work. At this point of the disassembly go for a replacement fuel pump and fuel filter. Post some pics of the YJ.
    Start the search at quadratec.com for the skid
     
  3. May 17, 2020 at 10:05 PM
    #3
    Jim Beam

    Jim Beam Well-Known Member

    Joined:
    Feb 11, 2019
    Member:
    #2891
    Messages:
    437
    Gender:
    Male
    First Name:
    Donald
    Vehicle:
    1986 CJ7
    Fuel Injection, Dana 44s, T18, 4.10s w/lockers
    Yeah, good work. Report back on your repair.
     
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