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 talk about how the “tune up” has evolved in recent decades and give advice regarding the maintenance schedule of your car or truck. Also on this show:

• Matt and Dave celebrate seven years of radio on KTAR.
• At what mileage increments should you replace your spark plugs?
• Why the cost of spark plugs has gone up in recent years and which type to use for your specific vehicle.
• 1998 Ford Expedition: While idling, my truck starts to shudder. Is this related to a faulty AC also?
• 2006 Toyota 4Runner: I’ve noticed a vibration in my steering wheel intermittently. What could be the cause of this?
• 2013 Dodge Ram: My truck is hesitating to start. What are the odds that this is spark plug related?
• 1996 Jeep Grand Cherokee: My Jeep has been stalling at stoplights. What could be contributing to this issue?

Cars talked about on this show are the 1998 Ford Expedition, 2006 Toyota 4Runner, 2013 Dodge Ram, and the 1996 Jeep Grand Cherokee.