Bumper to Bumper Radio, the car guys on KTAR, 92.3 FM in Phoenix, AZ, broadcast every Saturday from 11:00 am to noon. On this show, Dave Riccio of Tri-City Transmission in Tempe, AZ and Matt Allen of Virginia Auto Service in Phoenix, AZ ask if tune-ups actually required and if they fix anything. Special guests include Joel from Arizona Imports and Bill's Bimmers. Also on this show:

• Do tune-ups actually fix anything?
• Are tune-ups required?
• Is it labor intensive to replace spark plugs?
• How often should I get a valve adjustment?
• 2008 Infiniti G35: Is there a way to turn the TTM light off or do I have to replace all four tire pressure monitors?
• 2006 Honda Civic: How long does it take after the readiness monitors have been cleaned and reset until the car passes emissions?
• 1998 Chevrolet S10: What do I do about a continuous misfire in cylinder number three?
• 1996 Dodge Ram Van B250: After I start the car the idle doesn't rise and stays low.
• 2005 Hyundai: After replacing the power steering why is there still a noise that is increasing especially in cold weather.
• 2004 Hyundai Elantra 233,000 miles: My car idles high and is difficult to shift. What's wrong?
• Is E15 gasoline bad for my car?
• 2006 Ford Mustang GT 97,000 miles: Is it possible for the spark plugs to be stripped out when their removed?
• 2012 Chevrolet Equinox LTZ V6 14,500 miles: Is it necessary to have my fuel system cleaned out?

Cars talked about on this show are the 2008 Infiniti G35, 2006 Honda Civic, 1998 Chevrolet S10, 1996 Dodge Ram Van B250, 2005 Hyundai, 2004 Hyundai Elantra, 2006 Ford Mustang GT, 2012 Chevrolet Equinox LTZ