ISO an auto mechanic who can replace spark plugs on a 2003 Jeep Liberty. My daughter's car didn't pass the Emissions Test and they said that the #2 cylinder is misfiring. The car has about 140,000 miles on it (we bought used it in May) and I'm pretty sure that the plugs have never been replaced. My daughter is in town this weekend and I need someone who is reliable and reasonable. I will purchase the plugs, I just need someone who knows what they are doing to replace them. I live in STV. Thank you in advance for any and all suggestions.