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Message: <blockquote data-quote="MuscleInc1320" data-source="post: 835616" data-attributes="member: 9547"><p>honestly for one thing get rid of those bosch plugs. our cars run best with a copper autolite #25 or Motorcraft plugs. as for the car running lean i would say that you must have a major vacuum leak. which sucks in un-regulatedl. your car cant correct for this so it causes it to run lean. try spraying carb cleaner around the engine to look for the leak. the idle will change if you spray in the area of the leak. some shops can also perform vacuum leak test too</p></blockquote><p></p>