You are probably right as to human error. But I would think checking the spark woudl be one of the first things you would do. Any way I have just really lost interest with spending my money their anyway. Customer service in their repair dept. sucks. You park in the back of their lot to drop your stuff off . Hopefully their is a spot open. If not you park across the street and dodge cars to get over their. You then have to walk around to the front then all the way to the back to fill out your information. Now you get to walk back out the front and around to the back to give them you motor. Because they wont let you walk the 20 feet out the back door to where your rig is. Oh yeah hear is good one Apperantly they now keep an eye on this site as they called the shop where I took it and wernt to happy with the bad press they have gotten. They gotta problem they can email me its in the profile. I dont have a problem telling my side of this to them. a second opinion saved me lots of money and glad I decided to take it to 3 rivers afterwords. I will take it their first next time and save the $60 or so I spent on a misdiagnosis from the other shop.