Question: Did you change the oil afterwards? Cleaners like that (like GM's ubiquitous Top Engine Cleaner) can and will contaminate the engine oil so it is always a good idea to change the oil after the treatment has run it's course.I posted this a couple of days ago, it sounds like you got your problem fixed but you may want to be proactive.
I drove my car on Monday and noticed a bit of a hesitation, stumbling & bucking it felt almost like I ran across some rumble strips I didn't think too much of it but it happened a few more times I could just about duplicate it, it happened at low speeds just speeding up. I thought if I give it some gas it might clear out whatever it was but for the most part it didn't make it any better.
I remember reading about this type of issue on this forum so I already bought the GDI intake and vale cleaner, I took off the hose connecting the air cleaner to the manifold and emptied the can with my beautiful wife revving the engine to about 3k rpm it hesitated, stumbled and died a couple times but the "treatment" went as expected, I left it soak for an hour. I asked my son to go with me for a 15 minute drive per the directions and even he noticed the car was stumbling and not running right but by the time we got home the issue was gone....
I followed the directions (mostly) and it worked to perfection just as advertised, it has been a few days now and the car runs great.
Thank you all for the great advice, I'll do the treatment again in 5k miles and from here on out every 10k.