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Thread: engine knock

  1. #41
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    engine knock

    Buy OEM

    Any codes? Usually throws codes when knocking due to timing.


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    Last edited by JPNinPA; 04-12-2019 at 07:57 AM.
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  2. #42
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    Re: engine knock

    It's a 94, so it's not digital. Going to get the cam sensor today and see what happens.
    Needs to go yonder.

  3. #43
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    Re: engine knock

    94 has odb port see below
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  4. #44
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    Re: engine knock

    nope, It aint there, you owe me a cold one.
    Needs to go yonder.

  5. #45
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    Re: engine knock

    And I is an expensive biscuit.
    Needs to go yonder.

  6. #46
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    Re: engine knock

    then of course there is the posibility that I have the wrong year , then Ahhhh I got a problem.
    Needs to go yonder.

  7. #47
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    Re: engine knock

    yehaaa , the year was right. your diagram was wrong . Went to auto zone got one of the diagnostic things and went to plug it in . HUH, no plug in spot. then I learn I ave the wrong diagnostic toool in the first place. then I think I learn"LOL" the port is by the brake master cylinder, huh, tomorrows job maybe.
    Needs to go yonder.

  8. #48
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    Re: engine knock

    OH Yeah! Then I learned to day that you can get the code by the flashing engine light. Turn the key on and off 3 times, on the forth turn leave it on. The check engine light welll emit flashing code like morse code. Been a good day.
    Needs to go yonder.

  9. #49
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    Re: engine knock

    Two cold ones and a tent.
    Needs to go yonder.

  10. #50
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    Re: engine knock

    Ohio dont sound to exciteing, you can bring the tent and cold ones to the blue ridge mountains in virginia.
    Needs to go yonder.

  11. #51
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    Re: engine knock

    So what codes flashed up there?

    South east ohio is interesting for camping.



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  12. #52
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    Re: engine knock

    Have to regroup on it in a day or 2. Had great weather here to day 75 spring cleaning time.
    Needs to go yonder.

  13. #53
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    Re: engine knock

    Ok it may be a month before I get back to this issue. Spring is here and lawn needs mowing, working on an old farm house . Repairing one thing and as I'm doing it I hear a window drop out of it's frame and brake, lol. Yup I fit right in with that new show. What is it, bless this mess.,lol.
    Needs to go yonder.

  14. #54
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    Re: engine knock

    well, I havnt done anything to the cherrokee but start it up and run it a little here and there and the problem seems to have disappeared.
    Needs to go yonder.

  15. #55
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    Re: engine knock

    The problem still has not reappeared, must be something like a sensor got stuck from it not being run in a while.
    Needs to go yonder.

  16. #56
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    Re: engine knock

    Keep an eye on it.


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  17. #57
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    Re: engine knock

    Well, I am . But it puzzles me, why, what could be the possibilities. May be just run it till something happens, but I would like to do preventive maintenance. Oh well dont fix it if it aint broke. LOL
    Needs to go yonder.

  18. #58
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    Re: engine knock

    Based on the sound of the knock, it could be sever things.
    Dirty fuel filter
    Low pressure
    Dirty injector

    Stuck valve
    Stuck lifter


    Maintenance for stuck valve or lifter would be keeping oil clean. Some might suggest some additives. I have run a 1/2 quart of tranny fluid for a dar before changing the oil. Once in a while.
    Water/steam cleaning or sea foam the intake and calendars. Also occasionally run the engine for a block or two at or above 3500 rpm. Above 3500 rpm the valves were designed to allow them to turn. By turning they prevent buildup in one area.
    For the injectors occasionally run some cleaner in the tank. Or pull them and ultrasonic clean them. If they are bad just change them.


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    JPNinPA

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