Fbo buzzing noise

Feefsmaro93 · 09-17-2020, 12:16 PM

I have a 2017 ss a8 fbo with e85 and now have a slight buzz almost like a light tap that sounds like it is coming from the drivers foot well area under light load driving around ive checked under the car for stuff touching/rubbing cant see anything was wondering if the aftermarket fuel lines can cause this? Car runs fine but its quite annoying with the windows up and the music on or off sounds like its in the heater core box if i lay upside down and give it gas while listening.

squish72 · 09-17-2020, 04:57 PM

Video may help as it can be anything. Heater core is on the passenger side of the dash. Has this been going on ever since whatever you consider FBO was done?

Lemmy Camaro · 09-19-2020, 05:21 PM

I've experienced the same thing. It's like a buzz or rapid tapping as RPM increases. I'm thinking it's just header tick since it developed right after my long tube install. It's annoying and I'm definitely following this

1ssa_camaro · 09-19-2020, 08:10 PM

I’m not FBO, but I do have long tubes with off road x pipe, CAI, and flex fuel e85 tune. I have the same “buzzing noise from the driver side on the bottom. I think it’s exactly where the headers curve up onto the engine. That’s why it should be making that noise?

Booher · 09-20-2020, 10:15 AM

If i had to guess, you exhaust is touching something somewhere. When I did my headers I had two rattles, one was at the cross brace behind the front seats. I used 1 washer on each bolt to help space it down. The other was where the catalytic converters were. The angle had to be slightly changed before and after the cats. I loosened and adjusted the angle many times to get it to stop. That one sounded like it was on the floorboard right before the front seat. Maybe check your clearances at those two spots, they might be touching. Use a small expandable mirror to check and something to slide around the exhaust, like a piece of paper or thin cardboard. I hope this helps!

Feefsmaro93 · 09-20-2020, 07:10 PM

i figured it out with a stethoscope was the e85 kits fuel line resting on top of the sound tube on the fire wall and the pulsation from the fuel passing thru was resonating in the cabin.��

09-17-2020, 12:16 PM	#1
Feefsmaro93 Drives: 2016 white 1ss A8 Join Date: Jul 2016 Location: Ny Posts: 44	Fbo buzzing noise I have a 2017 ss a8 fbo with e85 and now have a slight buzz almost like a light tap that sounds like it is coming from the drivers foot well area under light load driving around ive checked under the car for stuff touching/rubbing cant see anything was wondering if the aftermarket fuel lines can cause this? Car runs fine but its quite annoying with the windows up and the music on or off sounds like its in the heater core box if i lay upside down and give it gas while listening.

09-20-2020, 10:15 AM	#5
Booher Drives: 2019 zl1 6 speed Join Date: Jul 2017 Location: Lake Havasu Arizona Posts: 979	If i had to guess, you exhaust is touching something somewhere. When I did my headers I had two rattles, one was at the cross brace behind the front seats. I used 1 washer on each bolt to help space it down. The other was where the catalytic converters were. The angle had to be slightly changed before and after the cats. I loosened and adjusted the angle many times to get it to stop. That one sounded like it was on the floorboard right before the front seat. Maybe check your clearances at those two spots, they might be touching. Use a small expandable mirror to check and something to slide around the exhaust, like a piece of paper or thin cardboard. I hope this helps! Last edited by Booher; 09-20-2020 at 10:17 AM. Reason: spell check

09-17-2020, 04:57 PM	#2
squish72 Drives: 2016 2SS 8AT Join Date: May 2018 Location: Nevada Posts: 358	Video may help as it can be anything. Heater core is on the passenger side of the dash. Has this been going on ever since whatever you consider FBO was done?

09-19-2020, 05:21 PM	#3
Lemmy Camaro Theoren Hanks Drives: 17 Camaro SS Join Date: Dec 2017 Location: Sacramento Posts: 96 View My Garage	I've experienced the same thing. It's like a buzz or rapid tapping as RPM increases. I'm thinking it's just header tick since it developed right after my long tube install. It's annoying and I'm definitely following this

09-19-2020, 08:10 PM	#4
1ssa_camaro Drives: 2017 Camaro 1ss A8 Join Date: Nov 2019 Location: California Posts: 114	I’m not FBO, but I do have long tubes with off road x pipe, CAI, and flex fuel e85 tune. I have the same “buzzing noise from the driver side on the bottom. I think it’s exactly where the headers curve up onto the engine. That’s why it should be making that noise?

09-20-2020, 07:10 PM	#6
Feefsmaro93 Drives: 2016 white 1ss A8 Join Date: Jul 2016 Location: Ny Posts: 44	i figured it out with a stethoscope was the e85 kits fuel line resting on top of the sound tube on the fire wall and the pulsation from the fuel passing thru was resonating in the cabin.��

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