This is my first time owning an FD and I just recently bought an Apexi intake. I installed it, connected all the hoses and started the car. It sounds good when you rev it, but as the RPMs go down you can hear a rumbling noise. It sounds like it might be coming from the top intake. Noise doesnt sound right. What is this noise? Could one of turbos be going bad? Anyone know whats going on or have any ideas, I would appreciate it. THanks!

 

It's the pipe coming from the top of the air pump. When you install an after market intake it needs to be blocked off. With the stock airbox it is normally recirculated so you cannot hear the noise.

Just get a rubber cap that will fit over it, poke a couple of air holes in it, and clamp it down tightly with a screw clamp. That should make it stop. The fighters garage intake comes with the cap.

 

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search:

"air pump moo"

 

https://www.rx7club.com/showthread.p...&highlight=moo

 

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