As i was breaking in my cars TF H/C/I today things seemed to be doing fine until around the 1 hour mark. The car started to feel bogged down and would get some pops in the exhaust, not too loud, then it would go back to normal for a bit and happen again. I stopped the car and shut it off. Check for fluid leaks and made sure i still had oil and coolant. Started it back up and everything seemed fine but shortly after the problems happened again. The check engine light comes on and off. All the vacuum lines seem good and intake fasteners still tight. Any ideas what it could be? Just seems odd that it started after and hour instead of right away. I might just have to take it to a mechanic.