2001 DIAMANTE Random Miss firing

Old 02-11-2016, 10:56 PM
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Join Date: Feb 2016
Location: Colorado Springs Colorado
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Post 2001 DIAMANTE Random Miss firing

Hello, I am new here and I have some questions.
If any one could help me.
Okay so I have a 2001 mitsu Diamante Ls, I have recently just replaced my entire engine just the engine because a coolant leak that was unable to be fixed as well as a some other engine problems that were occuring, But other than that i have a new engine in same make and model same year but now my car is throwing p0300 codes ( I understand that means random miss fire ) I know its not my spark plugs because those are new, I know that it is not the O2 censors ( or could it possibly be and there is just no code showing up. But my main issue is that when in idle or 40 mph and below i have this shaking with my engine like jolting and it sounds like it wants to die, it has only died once while in idle turned back on with no issue. I was wondering if anyone has had any experience with this happening,
Please and thank you
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