WOW...! My Kia Rio spit out an engine code saying I was getting a misfire in cylinder #3 which I could feel when I was driving. Very little help online from forums. Lots of people reporting similar problems but very little in the way of reported resolutions. So I replaced the spark plugs. The old ones didn't look bad but the miss seemed to go away for a day. Then it came back - even worse than before. So I cleaned the throttle body and replaced the Idle Air Control Valve (IAC), the Throttle Positioning Sensor (TPS), as well as the connector plugs from the wiring harness that plug into the coil packs (they were brittle and crumbled when I unplugged them). Now problem even worse. Running very rough, coughing, sputtering, and anything but smooth at idle. So I replaced the spark plug wires and the coil packs. Now even worse. Engine vacuum has all but gone away so the brake diaphragm wasn't working and the brake pedal was very hard to depress since the vacuum assist was no longer working. And, when starting cold, the engine would immediately race to 5,000 RPMs. No longer safe to drive. Time to put it in the shop and let someone diagnose the problem. I found Central Automotive online and chose them because they were close and my initial phone call, with I believe the owner, was very reassuring that this would be a simple adjustment to bring all of the sensors that I replaced back into correct alignment for the engine's computer (ECU). Long story short, I drove the car to their shop with my wife following me because I didn't think I was going to make it since the car was running so poorly. I get a call from the shop 2 days later, as promised, that the car was done. Everything fine I was told. Simple adjustment I was told. Hard to actually believe considering how badly the car was running. I was expecting a rather expensive repair bill. Not only was the final bill the same as the initial estimate, but they washed the car, cleaned all the windows inside and out, and dressed the tires. They took photos of other potential problem areas on the car, which I already knew were going to be problematic, and attached them to an email which was sent to me along with an explanation of what they found and fixed. Needless to say, my car has never run better. Even the violent shaking at a red light with the air conditioner on (previous problem I was just living with) has gone away as well, which I thought was just an inherent problem with Kias. In this day and age of corporate greed at the consumer's expense, it was an incredibly pleasing surprise to have received this level of honesty and service. They have definitely earned a new customer.