clunking noise pressing gas pedal after car start

coffeebob · 05-08-2017, 05:57 PM

I have been having some clinking/clunking noise from under the car for a while now. After starting the car and drive, no matter whether I let it sit overnight or just 15 minutes, whenever I press on the gas pedal, the noise would come on. The noise would disappear after a few minutes. If I press the gas pedal more gently, it makes less noise. The car drives fine otherwise.

my description makes any sense? Any ideas? Thanks.

Chan Chee Hoe · 05-08-2017, 06:59 PM

Engine mounting.?

SteveBad · 05-08-2017, 07:41 PM

Check all the lug nuts for tightness.

SouthArk370Z · 05-08-2017, 09:08 PM

If it's a single clunk, I'll guess it's the differential bushing or other mount in the drivetrain.

Jayhovah · 05-08-2017, 09:13 PM

Does the sound happen just revving the engine? or does it only happen in gear?

barncobob · 05-08-2017, 09:28 PM

U-joint?

coffeebob · 05-09-2017, 09:04 AM

it is not a single clunk, and it happens when revving the engine (the harder the more audible).

Ghostvette · 05-09-2017, 09:57 AM

Time to put it up on a set of ramps and look at the exhaust for loose shields. Something that 'clunks' is usually u-joints or diff, but since the OP didn't post mileage, AT/MT or other information, I'm going to guess exhaust shields.

OP, as a suggestion, when asking for help, try posting more information other than what you posted. Details like milage, transmission type, any mods would help us give you a logical answer and will leave you less open to troll responses.

onzedge · 05-09-2017, 11:36 AM

Quote:

Originally Posted by Ghostvette

Time to put it up on a set of ramps and look at the exhaust for loose shields. Something that 'clunks' is usually u-joints or diff, but since the OP didn't post mileage, AT/MT or other information, I'm going to guess exhaust shields.

OP, as a suggestion, when asking for help, try posting more information other than what you posted. Details like milage, transmission type, any mods would help us give you a logical answer and will leave you less open to troll responses.

coffeebob · 05-09-2017, 05:18 PM

thanks for all the suggestions! this is an auto, 58K miles. The interesting thing is no matter whether the car is warmed up or cold, the noise always appear in the first few revs of the engine. The noise went away after < 1 minute.

SouthArk370Z · 05-09-2017, 09:13 PM

Could be an oiling problem (eg, weak pump, clogged filter, etc).

05-08-2017, 05:57 PM	#1 (permalink)
coffeebob Base Member Join Date: Feb 2014 Location: coffeeland Posts: 42 Drives: coffee grinder Rep Power: 11	clunking noise pressing gas pedal after car start I have been having some clinking/clunking noise from under the car for a while now. After starting the car and drive, no matter whether I let it sit overnight or just 15 minutes, whenever I press on the gas pedal, the noise would come on. The noise would disappear after a few minutes. If I press the gas pedal more gently, it makes less noise. The car drives fine otherwise. my description makes any sense? Any ideas? Thanks.

05-08-2017, 07:41 PM	#3 (permalink)
SteveBad Base Member Join Date: Jan 2013 Location: Lake Martin, Alabama Posts: 138 Drives: 2013 370Z 6 speed Rep Power: 248	Check all the lug nuts for tightness. __________________ "Take the cannollis..."

05-08-2017, 09:08 PM	#4 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	If it's a single clunk, I'll guess it's the differential bushing or other mount in the drivetrain. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

05-09-2017, 09:57 AM	#8 (permalink)
Ghostvette A True Z Fanatic Join Date: Aug 2013 Location: Shawnee KS Posts: 5,698 Drives: 15 Magma Red 6MT Rep Power: 2684377	Time to put it up on a set of ramps and look at the exhaust for loose shields. Something that 'clunks' is usually u-joints or diff, but since the OP didn't post mileage, AT/MT or other information, I'm going to guess exhaust shields. OP, as a suggestion, when asking for help, try posting more information other than what you posted. Details like milage, transmission type, any mods would help us give you a logical answer and will leave you less open to troll responses. onzedge, SouthArk370Z, Chuck33079 and 1 others like this. __________________ 2015 Magma Red 6MT Sport Tech/2012 Fairlady MB 6MT Base (RIP 08032018)https://www.nicoclub.com/FSM/370Z/Coupe/

05-09-2017, 09:13 PM	#11 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Could be an oiling problem (eg, weak pump, clogged filter, etc). __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

05-08-2017, 06:59 PM	#2 (permalink)
Chan Chee Hoe Track Member Join Date: Mar 2009 Location: Singapore Posts: 861 Drives: 370z,Yellow,7sp A Rep Power: 17	Engine mounting.?

05-08-2017, 09:28 PM	#6 (permalink)
barncobob A True Z Fanatic Join Date: Sep 2015 Location: hangtown, CA Posts: 1,164 Drives: 16 370Z auto Rep Power: 590	U-joint?

05-09-2017, 09:04 AM	#7 (permalink)
coffeebob Base Member Join Date: Feb 2014 Location: coffeeland Posts: 42 Drives: coffee grinder Rep Power: 11	it is not a single clunk, and it happens when revving the engine (the harder the more audible).

05-09-2017, 05:18 PM	#10 (permalink)
coffeebob Base Member Join Date: Feb 2014 Location: coffeeland Posts: 42 Drives: coffee grinder Rep Power: 11	thanks for all the suggestions! this is an auto, 58K miles. The interesting thing is no matter whether the car is warmed up or cold, the noise always appear in the first few revs of the engine. The noise went away after < 1 minute.

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