1989 jeep Comanche running rich help!!

Discussion in 'Other Trucks' started by xxkenny90xx, May 17, 2015.

  1. xxkenny90xx

    xxkenny90xx Full Member

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    Hey guys, I just picked up an 89 Comanche 4cyl, manual. Basically it has black smoke coming out of the tail pipe, backfires every few seconds, and every 30 seconds or so it revs the engine on its own. The fuel pump and spark plugs are new. I want to work on it this week but was hoping you guys could give me some ideas what to look for. Thanks a lot
    Oh I also pulled the air filter box and sprayed some carb cleaner in and dumped some sea foam in the gas tank (but it runs so rough I haven't really ran it since)
     
  2. Kennyray

    Kennyray Moderator
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    I would check the timing and the cap and rotor.
     
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  3. xxkenny90xx

    xxkenny90xx Full Member

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    Can the timing be adjusted on these by turning the distributor? It looks like the cap is screwed on, can I just unscrew it and check the cap and rotor? (I'm used to older trucks and this set up is unfamiliar to me)
     
  4. Kennyray

    Kennyray Moderator
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    Apparently the timing is not adjustable. But I would still check all ignition components.
     
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  5. xxkenny90xx

    xxkenny90xx Full Member

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    Ok will do, thanks
     
  6. chevychase

    chevychase Semi-Admin
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    Is service/check engine light on? Could be a 02 sensor..coolant temp sensor..fuel regulator.
     

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