I don't know what "nulon "foaming air intake cleaner" to clean the throttle and pistons crown" is, but the sound of it makes me shudder.
I've used CRC with success, you can clean the AFM with it. (you don't have a MAF). I use brake cleaner to clean the TB and butterfly.
Back to the foam: Think of it this way-- how on Earth is that stuff supposed to travel into the intake, and onto the pistons equally? How does it burn / change the compression ratio? I'd not even consider whatever that stuff is.
If you want to clean your combustion / fuel areas-- get Jectron, and Ventil Sauber. They are the ONLY products I put into the fuel tank of my BMWs, or my clients BMWs. These are proven, WORKING, safe products.
It's not what you buy, it's what you build- Unknown
EN90283 - Stabled for HG repair
DH06247 - Running like a champ