Mechanics

AFTER A TUNE UP

2005 Lincoln Navigator

Engine Performance problem
2005 Lincoln Navigator V8 Two Wheel Drive Automatic 76000 miles

I had a tuneup on my car and one of the plugs broke when he pulled it out. He was able to fix it but he had to buy some more new parts. He told me it would run rough until the new parts are worked in. Is this true?
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Rob1210
March 14, 2010.




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