[shaunbhere]

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I'm not sure exactly what is going on with my car. I installed a VRSF 5" Stepped HD Core FMIC and VRSF Charge Pipe. The car ran fine for one day and then developed a coolant leak. I have fixed the leak and I now have this happening.

I have checked all of the o-rings and they are all installed. I have tightened the screw in the meth bung of the charge pipe. I have completely removed the charge pipe 3 times and have tightened the T-Clamps each of those three times. Should I try to tighten them some more?

Is it possible that something is wrong with the fmic or charge pipe that would cause this? Here is a video of the sound I am experiencing.

This is a 2013 335i M if it matters.

https://youtu.be/3uWXrOzwCNs

[shaunbhere]

Update: I pulled codes from the jb4. Am I possibly running the incorrect map? Here are the codes:
118401 Mixture Control AFR too lean
122108 BOV plausibility -- Ignore, tuner code

[insanecoder]

Have the guy who installed it check for leaks associated with chargepipe install.

[Zel335]

It doesn't really sound like Engine knock, normally you'll hear that consistently and not that drastic. I've dealt with engine knock on two cars before, sounded nothing like your video. It's hard to tell what is going on, I would just recheck everything and the coolant fix you did as well.

[shaunbhere]

Originally Posted by Zel335

It doesn't really sound like Engine knock, normally you'll hear that consistently and not that drastic. I've dealt with engine knock on two cars before, sounded nothing like your video. It's hard to tell what is going on, I would just recheck everything and the coolant fix you did as well.

Awesome, Thanks for that reassurance. I thought it was boost leak but someone said it sounded like knock and had me worried. I think the T-band clamps were loose. I decided to tighten them and realized they could still be much tighter. Unfortunately, I decided to make the clamp on the lower pipe a little tighter and snapped it. Just picked up a replacement from a friend so I will see if that was the problem a little later.