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  1. Oxygen Sensors/Trouble shooting Valve Chatter 1991 3.9L

    3.9L V6 Specific Topics
    :confused: Hey guys, Ive looked on Advance Auto parts site for the o2 sensors on my 1991 3.9 Auto Dakota and they are only giving me the "Upstream" one. From what Ive researched there are two o2 sensors no?? ..one being before the Cat and one after the Cat..correct? Do these o2 sensors have the...
  2. Timing Chain slap?

    2.2L/2.5L I4 Specific Topics
    I am getting a noise that sounds like something hitting on something from the front of the engine. 98 Dakota 2.5 4 cyl. I recently put a new head, radiator, water pump and thermostat on it. Now I am getting this noise. A friend says its timing chain slap. It sounds like marbles rolling around...
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