Hatch area "buzz" after exhaust install

JAYNO20 · 06-08-2013, 01:55 PM

After the FI install I am getting a buzzing/rattling from the rear hatch area only at higher rpms. Anyone have any idea where it might be coming from? I literally have the entire plastic/carpet area torn out of the hatch and am dynamatting it as we speak, but this issue still persists. It's gotta be something I can't see.

The sound is NOT coming from the bottom of the car it IS coming from the hatch, just don't know where...

chknhawk · 06-08-2013, 02:54 PM

the increase in power and loudness.

might be the bumper rattling.. its just a plastic cover with little plastic holders keeping it on there. Mine rattles.. i have come to accept that as HP gods talking to me while I zoom past mustangs and BR-Z's.

MIGHTYMOUSE · 06-08-2013, 05:46 PM

I also have this same issue it sounds more like it’s something between the plastic covers in the hatch and the metal. I’ve ripped everything apart a few times and have gt-mat all over my trunk. I have no issues with the exhaust itself. My next thing to check is the wire harness for the hatch light. I'm sure most people just accept this but if I can stop some noises from happening it makes my exhaust tone that much more enjoyable!

cheshirecat · 06-08-2013, 05:49 PM

Check all the items under the carpet to make sure they're secure. Spare, jack, etc. Also check to make sure it's not your license plate or frame buzzing against the rear bumper cover.

kenchan · 06-08-2013, 06:54 PM

i found a dead bee in the trunk when i was removing the hatch weight.

MIGHTYMOUSE · 06-08-2013, 08:34 PM

I put gt-mat behind the license plate but my plate is only secured with the two top screws. I'm going to secure it with four tomorrow. I've checked everything in the hatch area as well, nothing seems loose.

Z-Girl 12 · 06-08-2013, 08:41 PM

that sucks...I'm sure it's annoying.

DarkJak · 06-08-2013, 10:36 PM

I have the same issue. It used to be REALLY bad at around 4 thousand rpm. The biggest culprit were the pennies I put in the hatch springs to fix the opening issue. Then some other offenders were coins in my cupholder and pens in the doors.
Still buzzes every once in a while, but now it's doing so under the sound of the exhaust instead of over it, so it's livable.

JAYNO20 · 06-09-2013, 07:05 PM

i have everything out of the hatch, the spare tire, all the tools, carpet, plastics, everything. It still buzzes... Really not sure where its coming from but its annoying.

cheshirecat · 06-09-2013, 07:09 PM

are you certain it's inside the car

370zGatorman · 06-09-2013, 07:59 PM

I had my FI exhaust installed a few months ago but didn't experience the noise you mentioned. I was ready though as I had already covered the entire trunk with Dynamat Extreme and as mentioned earlier I put the Dynamat behind the license plate as well. I would highly suggest both of these options and then see how it sounds from there.

JAYNO20 · 06-10-2013, 01:23 AM

Quote:

Originally Posted by 370zGatorman

I had my FI exhaust installed a few months ago but didn't experience the noise you mentioned. I was ready though as I had already covered the entire trunk with Dynamat Extreme and as mentioned earlier I put the Dynamat behind the license plate as well. I would highly suggest both of these options and then see how it sounds from there.

I did the license plate and almost the whole hatch. I still have a little bit left before the whole hatch is done, but this one buzzing sound still remains. The damn car has no other rattles but this one and its killer.

It is DEFINITELY coming from inside the car, I had someone lay underneath it when I started it to verify it wasn't outside.

red2010z · 06-10-2013, 02:19 AM

Are you sure it is not the exhaust hitting the middle support frame? When I installed my aftermarket exhaust I had to install a bunch of heat metal tape around the mid-frame to stop the rattle.

SouthArk370Z · 06-10-2013, 08:01 AM

Use a paper towel core held to your ear (acts like a directional microphone) to isolate where the sound is coming from. Will take two ppl; one on throttle and one listening.

edub370 · 06-10-2013, 11:29 AM

I also have this sound. it is definately the hatch plastics

06-08-2013, 01:55 PM	#1 (permalink)
JAYNO20 Track Member Join Date: Mar 2012 Location: Pittsburgh, PA Posts: 802 Drives: 2010 370Z Nismo Rep Power: 14	Hatch area "buzz" after exhaust install After the FI install I am getting a buzzing/rattling from the rear hatch area only at higher rpms. Anyone have any idea where it might be coming from? I literally have the entire plastic/carpet area torn out of the hatch and am dynamatting it as we speak, but this issue still persists. It's gotta be something I can't see. The sound is NOT coming from the bottom of the car it IS coming from the hatch, just don't know where... __________________ 2010 Solid Red NISMO #0334 - SOLD 2014 Red Hot Camaro ZL1

06-08-2013, 02:54 PM	#2 (permalink)
chknhawk Track Member Join Date: May 2012 Location: Kentucky Posts: 541 Drives: Like a batouttahell! Rep Power: 13	the increase in power and loudness. might be the bumper rattling.. its just a plastic cover with little plastic holders keeping it on there. Mine rattles.. i have come to accept that as HP gods talking to me while I zoom past mustangs and BR-Z's. __________________ \| AEM \| INVIDIA \| GREDDY \| STANCE \| NISMO \| SETRAB \| STOPTECH \| HAWK \| TOYO \| HANKOOK \| BRIDE (wishlist) \|

06-08-2013, 05:46 PM	#3 (permalink)
MIGHTYMOUSE Base Member Join Date: Feb 2011 Location: Jacksonville, FL Posts: 208 Drives: Nissan 370Z Rep Power: 3369	I also have this same issue it sounds more like it’s something between the plastic covers in the hatch and the metal. I’ve ripped everything apart a few times and have gt-mat all over my trunk. I have no issues with the exhaust itself. My next thing to check is the wire harness for the hatch light. I'm sure most people just accept this but if I can stop some noises from happening it makes my exhaust tone that much more enjoyable! __________________ 2009 Nissan 370Z 6MT

06-08-2013, 06:54 PM	#5 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141520	i found a dead bee in the trunk when i was removing the hatch weight. LMBmikeZ and 03g35coupe6mt like this.

06-08-2013, 08:34 PM	#6 (permalink)
MIGHTYMOUSE Base Member Join Date: Feb 2011 Location: Jacksonville, FL Posts: 208 Drives: Nissan 370Z Rep Power: 3369	I put gt-mat behind the license plate but my plate is only secured with the two top screws. I'm going to secure it with four tomorrow. I've checked everything in the hatch area as well, nothing seems loose. __________________ 2009 Nissan 370Z 6MT

06-08-2013, 05:49 PM	#4 (permalink)
cheshirecat A True Z Fanatic Join Date: Jan 2009 Location: Florida Posts: 1,428 Drives: N54 135i Rep Power: 292	Check all the items under the carpet to make sure they're secure. Spare, jack, etc. Also check to make sure it's not your license plate or frame buzzing against the rear bumper cover.

06-08-2013, 08:41 PM	#7 (permalink)
Z-Girl 12 A True Z Fanatic Join Date: Apr 2012 Location: Florida Posts: 4,105 Drives: Spirited Rep Power: 11716	that sucks...I'm sure it's annoying. __________________ 2012 Z-SOLD 2014 Nismo #565 Fast Intentions CBE/HFC/Swift/SPC/RJM/H&R-15/20mm/Z1 CAI/Headers/Intake Manifold w/Uprev Tune 328.31whp/263.64tq

06-08-2013, 10:36 PM	#8 (permalink)
DarkJak A True Z Fanatic Join Date: Jun 2011 Location: Madison, WI Posts: 1,390 Drives: 2009 370Z Rep Power: 13448	I have the same issue. It used to be REALLY bad at around 4 thousand rpm. The biggest culprit were the pennies I put in the hatch springs to fix the opening issue. Then some other offenders were coins in my cupholder and pens in the doors. Still buzzes every once in a while, but now it's doing so under the sound of the exhaust instead of over it, so it's livable. __________________ @stupidtoycars \| My track vids 09 7AT\|MCS 2WNR\|Topgunz Rotrex\|Ecutek (Eugene)\|Maxxis RC1\|Titan-7 TS-5\|OSG LSD\|Rear Mount Derale Oil Cooler (WIP)+25 Trans Cooler\|Fismo\|G-LOC R12/R10\|Zeta III L\|NLR Wing and Splitter\|CJM Pan and Fuel Hat\|Radium Surge Tank\|AP Racing CP9668

06-09-2013, 07:05 PM	#9 (permalink)
JAYNO20 Track Member Join Date: Mar 2012 Location: Pittsburgh, PA Posts: 802 Drives: 2010 370Z Nismo Rep Power: 14	i have everything out of the hatch, the spare tire, all the tools, carpet, plastics, everything. It still buzzes... Really not sure where its coming from but its annoying. __________________ 2010 Solid Red NISMO #0334 - SOLD 2014 Red Hot Camaro ZL1

06-09-2013, 07:09 PM	#10 (permalink)
cheshirecat A True Z Fanatic Join Date: Jan 2009 Location: Florida Posts: 1,428 Drives: N54 135i Rep Power: 292	are you certain it's inside the car

06-09-2013, 07:59 PM	#11 (permalink)
370zGatorman Base Member Join Date: Jun 2012 Location: Charlotte, NC Posts: 113 Drives: 2009 370z Rep Power: 12	I had my FI exhaust installed a few months ago but didn't experience the noise you mentioned. I was ready though as I had already covered the entire trunk with Dynamat Extreme and as mentioned earlier I put the Dynamat behind the license plate as well. I would highly suggest both of these options and then see how it sounds from there.

06-10-2013, 02:19 AM	#13 (permalink)
red2010z Track Member Join Date: Apr 2013 Location: Texas/North Carolina Age: 38 Posts: 587 Drives: '10 Red B/S/M Rep Power: 12	Are you sure it is not the exhaust hitting the middle support frame? When I installed my aftermarket exhaust I had to install a bunch of heat metal tape around the mid-frame to stop the rattle. __________________ AGENCY K&N SWIFT CSF EVO-R VOSSEN MICHELIN Z1 JVC ZENCLOSURE JLW3 JVC

06-10-2013, 08:01 AM	#14 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324197	Use a paper towel core held to your ear (acts like a directional microphone) to isolate where the sound is coming from. Will take two ppl; one on throttle and one listening. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

06-10-2013, 11:29 AM	#15 (permalink)
edub370 A True Z Fanatic Join Date: May 2011 Location: KCMO Posts: 3,458 Drives: 09 370z S/T 6MT Rep Power: 19	I also have this sound. it is definately the hatch plastics __________________ 09 370Z ST 6MT//Injen CAI//Greddy CBE//TP//TSW's//Swifts//Stillen lip//Whiteline sways 326whp/268tq

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