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surging idle

  1. 99-03 7.3L General Discussion
    I have a 1999 f250 4x4 with the 7.3. I have been having problems with a rough idle especially after the engine has warmed up. Yesterday I discovered a cracked injector cup that i am in the process of replacing as soon as i can rent a tool. I'm hoping that fixing the injector cup will also fix...
  2. 6.0 Motor problems
    I have looked through a crap ton of threads and haven't narrowed down my problem yet. When the truck is warm, it does a surging idle, in park or drive. Sometimes it does the jumping forward at a stop light. my ICP at idle reads around 590/600psi my IPR % is around 22%. So those seem to check...