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  1. Re: Strange and horrible sounding '87 Renix 4.0 I6

    Thank the lord in the heavens above. I got it running.

    I took off the exhaust from where the cat connects back, and I started it and it ran fine. The cat melted and was causing a huge exhaust...
  2. Re: Strange and horrible sounding '87 Renix 4.0 I6

    Also, while it runs for the very short amount of time, it's making weird noises the whole time.
  3. Re: Strange and horrible sounding '87 Renix 4.0 I6

    Ok, so replacing the CPS didn't help at all. It's still doing the same thing. The first thing I'm going to do next is a compression test. I know that's really the first thing I should've done, but I...
  4. Re: Strange and horrible sounding '87 Renix 4.0 I6

    I think I found my problem.

    http://i493.photobucket.com/albums/rr299/matt0108/Mobile%20Uploads/image1.jpg

    http://i493.photobucket.com/albums/rr299/matt0108/Mobile%20Uploads/image1-2.jpg
    ...
  5. Re: Strange and horrible sounding '87 Renix 4.0 I6

    I checked to see if mine had a fuel pump ballast resistor, it doesn't. Nor do I see wires where one might have been.
  6. Re: Strange and horrible sounding '87 Renix 4.0 I6

    The only reason I'd get it somewhere local is the not waiting for shipping part.
  7. Re: Strange and horrible sounding '87 Renix 4.0 I6

    Ok. Because I never replaced it and it can't hurt to replace it. Thanks.
  8. Re: Strange and horrible sounding '87 Renix 4.0 I6

    So if I got a Bosch one at AutoZone, I could return it if I need to?
  9. Re: Strange and horrible sounding '87 Renix 4.0 I6

    Ok. Is there a brand I should stay away from? Where should I get it?

    Also, thank you for helping me out. The Cherokee veterans over at Cherokee forum are giving me crap for asking suggestions.
  10. Re: Strange and horrible sounding '87 Renix 4.0 I6

    Ok. Is there a way to test the O2 sensor? Or do I just have to flat out replace it?

    And I was thinking, that maybe background info as to how this may have happened, might help people understand...
  11. Re: Strange and horrible sounding '87 Renix 4.0 I6

    No, I don't think anyone mentioned checking the O2 sensor. The current one in there is probably pretty old, so it could be bad. Would an exhaust leak cause one to go bad quicker?
  12. Re: Strange and horrible sounding '87 Renix 4.0 I6

    Ok. So what else could be causing my jeep to start but not run for very long? The only things I can think of are related to fuel and spark.

    My step dad mentioned an intake manifold leak. Is that...
  13. Re: Strange and horrible sounding '87 Renix 4.0 I6

    I did the permanent fuel pressure gauge mentioned in this, while it's running it says about 40psi+/-1 or 2, when the key is just in the on position, not running, about 35psi+/-1.
  14. Re: Strange and horrible sounding '87 Renix 4.0 I6

    I'm going to test the coil and ICM to see if they're good or not. Then I think, the fuel pressure regulator and vacuum lines are next to be checked.

    All that sound good to ANYONE on the forum?
  15. Re: Strange and horrible sounding '87 Renix 4.0 I6

    Ok. So I went and got my battery checked, just so I could rule it out, it wasn't it.
    Tested the spark coming from the coil, it's not "blue and snappy," it's "sluggish and yellow."
    Cleaned up the...
  16. Re: Strange and horrible sounding '87 Renix 4.0 I6

    Ok, so, I did this "http://www.xjtalk.com/showthread.php?t=13190," and it is always close to 40psi+/-1.
    I will borrow a compression tester and do that too.
  17. Re: Strange and horrible sounding '87 Renix 4.0 I6

    Could it also be a bad coil? And, this sensor ground in the harness that you speak of, where is it?
  18. Re: Strange and horrible sounding '87 Renix 4.0 I6

    It didn't really sound like it does now, it was just typical 4.0 sounds

    No, didn't change wires, cap, or rotor. I'm going to change those whenever I get the chance. Plugs are regular old champion...
  19. Re: Strange and horrible sounding '87 Renix 4.0 I6

    Cleaned it and the throttle body like 2.5-3 months back.
  20. Re: Strange and horrible sounding '87 Renix 4.0 I6

    Well, whenever I start my jeep when it's cold, it won't run for more than a minute. It'll run for about 30-40 seconds, then it'll just sputter out and die. I'm thinking it's got something to do with...
  21. Re: Strange and horrible sounding '87 Renix 4.0 I6

    Anyone? No ideas?
  22. Strange and horrible sounding '87 Renix 4.0 I6

    Hey all. Thanks for reading.

    I'm having a really hard time figuring what my 4.0 is doing. It sounds really horrible when it's running. Almost as if it's not running on all cylinders/misfiring....
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    Re: Tow hooks/brackets

    Did you ever see them in the daylight?
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    Re: Tow hooks/brackets

    If you'll take $25 for them, I'll take the gamble.
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    Re: Tow hooks/brackets

    Are those stock hooks/brackets?
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