Air Sucking Noise After Dyno Run

1987lxhatch

Active User
Jul 8, 2017
16
2
13
Montreal canada
Hey guys I just got back from a dyno rum and tune, all went well.

But coming back home after a few miles I heard a kind of interference noise

At first it seemed that it was coming from the speakers(when accelerating the noise increased) when I turned the radio off I did not hear it anymore.

After a few miles even with the radio off it sounded like a loud air sucking noise that gradually gets higher when accelerating.

He set my timing to 10 with the car grounded to check the voltage. Checked air fuel ratio played with timing a bit checked my plugs.

The only other thing that I can think on is that I changed my intake manifold this weekend but all was good. The sound only appeared after the dyno runs.

I will check further on the weekend but I was wondering if anybody has ideas what could be a place to start looking. Thanks
 
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