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  1. M

    4.0 engine replacement

    Thanks Mike! Any reason you need the oil sending unit? I thought it’s just one lead sensor?
  2. M

    4.0 engine replacement

    Hey all, I have a 91YJ with 4.0 and the AX15. I need a new engine. I found one on FB marketplace for cheap but it is a 4.0 out of an XJ. will this be a problem for me or would it be a simple swap? Any pointers or old threads would be appreciated!
  3. M

    YJ won't start

    I’ll give it a shot
  4. M

    YJ won't start

    1991, 4.0, it’s from another Jeep. Checked compression I have good compression before I took the engine out
  5. M

    YJ won't start

    Hey all, I need help. I just installed the engine on my Jeep. It cranks but it doesn’t run. I sprayed ether in the throttle body while cranking and I am not getting anything. I have spark with a test light, and I just put new injectors, distributor, plugs, and wires I’m hoping my timing is 180...
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