Quote:
Originally Posted by cre
It's a 20+ year old engine which has most likely been beaten and abused its entire life.
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7m, the redheaded stepchild of the sport car community.
"What were the figures you were given for the comp. tests, was there a set of "dry" and "wet" figures given?
Engine, N/A? Turbo? Model year? US/JDM etc? please help us to help you 
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the rough running like your driving on a road with a bunch of holes cound be caused by any number of items.. bad cracked air lines.. fuel pump.. spark plugs. leads..
what codes are you tossing? see the faq to diagnose codes.