if the sound your referring to is a clicking/ticking at idle yes I’m in the same boat but mine also sounds like a rattle at low rpms/speed no onewould seem to find my problem itwasn’t valves anything in trans mounts etc. I’m thinking it’s the manifold I wasn’t aware of the manifold issues so after watching so many YouTube videos I seen ppl saying it’s the little butterfly type pieces in the manifold and if you disconnect that cable that connects to the Intake runner control valves and it stops that ticking type sound at idle then the little butterfly’s are the issue it’s recommended to be replaced but I’ve heard you can actually find a way to just take them out completely as they aren’t necessary and you actually gain a bit of power and it won’t throw you a code not sure how accurate that is as I’m just learning on this and strongly believe this is the issue I’m having .! And it’s crazy no mechanics even the pros could diagnose this I might have just saved myself from replacing my motor as I was told !Ok everyone, by now those of you who own a 2004 Mazda 3-2.3, know about the intake manifold issues with sticking and the notorious clicking annoying sound especially when the engine is cold. I had the intake manifold replaced with a new one from a Mazda dealer and unfortunately, the problem came back (wtf). With this said, can anyone tell me, out of experience, how you took care of that problem, how you got it fixed. I've seen a lot of videos of people seafoam their engines but I want to know from those who have done it, if seafoaming the engine fixed the sticking and clicking sound problem in the intake manifold permanently.