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  1. C

    Need some help with 91 YJ engine codes 75 and 73

    I have a ‘91 YJ with an auto trans Recently did an engine swap Jeep has 109k miles on it new engine came out of a good running 90k miles Jeep Engine came out of a ‘92 When driving it around town it runs fine I am noticing that when you give it more than half throttle its not that responsive...
  2. C

    Hard start problem when engine is cold

    I have a ‘91 YJ that is a project im doing with my son had a blown engine in it according to the previous owner we sourced a new engine and swapped it and got it up and running it runs like a top no noise great oil pressure no overheating issues etc the only thing is that it starts up very...