Now you are kidding me.It's not the exact same car. Different intake setups, hood open, etc. was what I was referring to.
It's not hitting the clutch that makes the noise, it shifting then opening the throttle right after. Creating huge vacuum then no vacuum air is rushing past the throttle body making noise.
What does the intake setup and the opened or closed hood have to do with that noise. I posted a vid before with my car making the same sound, do I have the same mods with andres?
No, even if you hitting the rev limiter with neutral the clattering is there. You should know that if you have personal experience from the problem.
It is not neccessary that with valve float(or valve spring float or whatever is going on in there) you will have missfires, or backfires etc.Valve float WILL show up in logs as a rich A/F mixture, huge immediate drop of power, and MAF readings would probably show something weird if intake valves are floating as the air reverses and pushes back into the intake. MAF value would drop despite turning more RPMs. Might hear popping and backfiring in extreme cases.
Mine, from the rpms that was starting doing the noise, it was loosing power on the diagram
Nope..it's how I wrote it. 7,000 reads on the tach, 72xx - 7300 shows up as max RPM in the logs.
I 've logged 6 different Mazda 2s(1.3 + 1.5), 6/6 the tachos were showing more rpm.