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

CJ7 issues...

Discussion in 'Jeep CJ' started by airspaulding, Apr 16, 2020.

  1. Apr 16, 2020 at 6:01 PM
    #1
    airspaulding

    airspaulding [OP] New Member

    Joined:
    Apr 16, 2020
    Member:
    #4560
    Messages:
    4
    Gender:
    Male
    Salida, Co
    Hi, Im new to the jeep world and I am at my wits end (that has probably been said a lot here). Last year a bought a '80 cj7, a bit of a beater but looked clean under the hood. It ran great for about 4 months...then, out on the highway, it started to stall, sputter, then die. It would start again, go for a few and then do it again. This problem got worse as I got closer to home - barely made it without a tow but had to restart a bunch. So, i made a list of things that could be wrong. I started with the fuel system (I don't know why). Replaced the fuel filter (duh), nope. I noticed that the carb (an aftermarked EMPI EPC 32/36X progressive) had loosened off of it's studs and trashed the gaskets between the adapter plates - So i replaced the gaskets...nope. Switched out the auto choke with a manual one...nope. Replaced the fuel pump and the fuel pressure regulator, nope. So I switched to the ignition system.... Replaced all plugs and wires...nope. Replaced the ICM...nope. Replaced the coil, the distributor (whole thing), and checked timing...nope.
    After all of the replacements, it seems to run a little better. It idles fine but it will stall out at about 2200 rpm (ish) - i cant even get up to highway speeds and it seems to worsen going up hills....
    What am i missing???? Help please!
     
  2. Apr 17, 2020 at 4:18 PM
    #2
    Jim Beam

    Jim Beam Well-Known Member

    Joined:
    Feb 11, 2019
    Member:
    #2891
    Messages:
    434
    Gender:
    Male
    First Name:
    Donald
    Vehicle:
    1986 CJ7
    Fuel Injection, Dana 44s, T18, 4.10s w/lockers
    Another possibility would be a bad distributor pick up coil. By this time it wouldn't hurt to replace the distributor with an aftermarket one purchased through one of the big box 4WD outfits. The symptoms are the same as a bad icm also, which is an excessive engine miss. You should get between 400 and 800 ohms between the violet and orange wires coming from the distributor.
     
  3. Apr 17, 2020 at 5:36 PM
    #3
    airspaulding

    airspaulding [OP] New Member

    Joined:
    Apr 16, 2020
    Member:
    #4560
    Messages:
    4
    Gender:
    Male
    Salida, Co
    Thanks for the reply Jim!

    I replaced both of those things.... No dice.
    ...so you're thinking ignition system, huh?

    What would be the symptoms of a bad fuel sender?

    I'm really reaching at this point...

    Could there be something up with the carb???
     
  4. Apr 17, 2020 at 5:52 PM
    #4
    Jim Beam

    Jim Beam Well-Known Member

    Joined:
    Feb 11, 2019
    Member:
    #2891
    Messages:
    434
    Gender:
    Male
    First Name:
    Donald
    Vehicle:
    1986 CJ7
    Fuel Injection, Dana 44s, T18, 4.10s w/lockers
    You might want to try a fuel pressure gauge at the carb inlet, look for a steady 4 psi, this will also check how good the fuel pump is. There could be cracks in the fuel line where it comes out of the tank as it is a soft line from there. A bad icm will be warm to the touch if bad, sometimes they can be bad right out of the box. The best one I have seen was made by Echlin from N.A.P.A. auto parts. Yes it could be the carb, look down the throat while it is running for a steady spray.
     
  5. Apr 17, 2020 at 7:52 PM
    #5
    airspaulding

    airspaulding [OP] New Member

    Joined:
    Apr 16, 2020
    Member:
    #4560
    Messages:
    4
    Gender:
    Male
    Salida, Co
    Will do! Thanks!
     
  6. Apr 18, 2020 at 11:57 AM
    #6
    airspaulding

    airspaulding [OP] New Member

    Joined:
    Apr 16, 2020
    Member:
    #4560
    Messages:
    4
    Gender:
    Male
    Salida, Co
    Hey Jim!
    So, the carb is a progressive empi epc 32/36 x - i only see fuel spray on one side (passenger) and nothing on the other even at high rpm (about 3.5k is all i get before she stalls out). My gut tells me to replace the carb... those are around 250$...no big deal, those seem to perform fine.
    Do you recommend one that would work better? I have the 258 6 engine and i live at 7000ft.

    Thanks for your input!
     
  7. Apr 18, 2020 at 2:44 PM
    #7
    Jim Beam

    Jim Beam Well-Known Member

    Joined:
    Feb 11, 2019
    Member:
    #2891
    Messages:
    434
    Gender:
    Male
    First Name:
    Donald
    Vehicle:
    1986 CJ7
    Fuel Injection, Dana 44s, T18, 4.10s w/lockers
    I would suggest cleaning the carb first and try that before shelling out the loot for another one. I have heard that Empi carb is a good one.
     
    aggrex likes this.
  8. May 18, 2020 at 10:23 PM
    #8
    jeepnik

    jeepnik Member

    Joined:
    May 18, 2020
    Member:
    #4664
    Messages:
    8
    Gender:
    Male
    Let's see forty year old Jeep. Probably a forty year old gas tank. Think there might be some crud in there?

    Drop the tank and flush it out, or just replace it and be done with it.
     
    Jim Beam and aggrex like this.
  9. May 19, 2020 at 11:24 AM
    #9
    Jim Beam

    Jim Beam Well-Known Member

    Joined:
    Feb 11, 2019
    Member:
    #2891
    Messages:
    434
    Gender:
    Male
    First Name:
    Donald
    Vehicle:
    1986 CJ7
    Fuel Injection, Dana 44s, T18, 4.10s w/lockers
     
  10. May 19, 2020 at 11:27 AM
    #10
    Jim Beam

    Jim Beam Well-Known Member

    Joined:
    Feb 11, 2019
    Member:
    #2891
    Messages:
    434
    Gender:
    Male
    First Name:
    Donald
    Vehicle:
    1986 CJ7
    Fuel Injection, Dana 44s, T18, 4.10s w/lockers
    Good Idea Jeepnik! Along with changing the fuel pickup sock. Although you could remove the pickup sock and install an external fuel filter.
     
To Top