Weird JZ idle noise - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nomoremrriceguy · 02-01-2017, 04:32 PM

Lately, when I've started up my car the exhaust blows out a small white puff of smoke and then stops, I think it's signs of a blown head gasket, but other then the smoke on start up it drives great and has no problems, the radiator also started to leak small amounts of coolant every now and then so im not sure what the problem is? I've read a few forum posts that say bad ecu capacitors could also be the culprit, heres a youtube video of the car starting up (note this was the first time its started up in 3 days, the revs were being held at about 3k by the ecu)

Heres the video https://www.youtube.com/watch?v=k-MtOP9yvWw

nomoremrriceguy · 02-01-2017, 06:27 PM

anyone have any suggestions?

240msh · 02-09-2017, 09:48 AM

Quote:

Originally Posted by nomoremrriceguy

anyone have any suggestions?

That's weird, im not sure.. I see you play cs tho? haha

baube · 02-09-2017, 10:43 AM

it's pretty common for old jz to puff a little on startup. usually due to valve seals.

as for the sound and the coolant I can't help you on this

nomoremrriceguy · 02-09-2017, 10:54 AM

Quote:

Originally Posted by 240msh

That's weird, im not sure.. I see you play cs tho? haha

yeah I do haha do you?

snatchmarks · 02-09-2017, 11:26 AM

Quote:

Originally Posted by baube

it's pretty common for old jz to puff a little on startup. Usually due to valve seals.

As for the sound and the coolant i can't help you on this

With that being said sounds like the motor is running fine and your rad is just leaking? Maybe you're low on coolant..? Not sure what you mean about the ecu..

240msh · 02-09-2017, 01:54 PM

Yea, quit a while ago but I've been playing a little lately, what rank are you?

nomoremrriceguy · 02-09-2017, 03:46 PM

Quote:

Originally Posted by 240msh

Yea, quit a while ago but I've been playing a little lately, what rank are you?

nice, hit me up if you wanna play sometime, I'm a global elite

240msh · 02-09-2017, 08:12 PM

you got skype or something? i was global over a year ago and then went down to lem/smfc couldnt get ge back because i played esea more lmao, then around September i lost interest and only did stuff with the 240 lmao

nomoremrriceguy · 02-09-2017, 08:14 PM

Quote:

Originally Posted by 240msh

you got skype or something? i was global over a year ago and then went down to lem/smfc couldnt get ge back because i played esea more lmao, then around September i lost interest and only did stuff with the 240 lmao

for sure haha I have Skype but I never use it, I have teamspeak though, my names just Jonathan on steam so you'll never find me, if you look up the group "lunar flare" I'm one of the admins in that group

KAT-PWR · 02-09-2017, 09:11 PM

Valve stem seals

240msh · 02-09-2017, 09:11 PM

i added you on steam, my name is "SevN"

Flicktitty · 02-09-2017, 09:38 PM

the puff could be valve stem seals like other mentioned as it is overly common, but that is more of a blueish smoke and not white.

What exact noise are you concerned about? The high pitched noise sounds like the IACV or the wobbly sounding noise? that sounds rotational, so possibly a bad tensioner. hard to tell. can you pinpoint where the sound is coming from?

EarlsWorld · 02-26-2017, 02:56 PM

run a compression test on it to rule out head gasket

nomoremrriceguy · 02-26-2017, 02:57 PM

Quote:

Originally Posted by EarlsWorld

run a compression test on it to rule out head gasket

Tested compression. 160psi across all cylinders

02-01-2017, 04:32 PM	#1
nomoremrriceguy Leaky Injector Join Date: Mar 2016 Location: bay area, ca Posts: 95 Trader Rating: (2) Feedback Score: 2 reviews	Weird JZ idle noise Lately, when I've started up my car the exhaust blows out a small white puff of smoke and then stops, I think it's signs of a blown head gasket, but other then the smoke on start up it drives great and has no problems, the radiator also started to leak small amounts of coolant every now and then so im not sure what the problem is? I've read a few forum posts that say bad ecu capacitors could also be the culprit, heres a youtube video of the car starting up (note this was the first time its started up in 3 days, the revs were being held at about 3k by the ecu) Heres the video https://www.youtube.com/watch?v=k-MtOP9yvWw Last edited by nomoremrriceguy; 02-01-2017 at 05:09 PM..

02-09-2017, 09:11 PM	#11
KAT-PWR Nissanaholic! Join Date: Dec 2011 Location: US Posts: 2,040 Trader Rating: (11) Rides Gallery: KAT-PWR Feedback Score: 11 reviews	Valve stem seals __________________ MRP Manufacturing

02-09-2017, 09:38 PM	#13
Flicktitty Post Whore! Join Date: Apr 2007 Location: Wisconsin Age: 37 Posts: 3,685 Trader Rating: (13) Feedback Score: 13 reviews	the puff could be valve stem seals like other mentioned as it is overly common, but that is more of a blueish smoke and not white. What exact noise are you concerned about? The high pitched noise sounds like the IACV or the wobbly sounding noise? that sounds rotational, so possibly a bad tensioner. hard to tell. can you pinpoint where the sound is coming from? __________________ 2JZ-GTE Swapped S13 Coupe - 1994 Supra Turbo

02-26-2017, 02:56 PM	#14
EarlsWorld Join Date: Jan 2017 Location: alberta canada Age: 25 Posts: 44 Trader Rating: (0) Feedback Score: 0 reviews	run a compression test on it to rule out head gasket __________________ How cool is being cool?

02-01-2017, 06:27 PM	#2
nomoremrriceguy Leaky Injector Join Date: Mar 2016 Location: bay area, ca Posts: 95 Trader Rating: (2) Feedback Score: 2 reviews	anyone have any suggestions?

02-09-2017, 10:43 AM	#4
baube Leaky Injector Join Date: Oct 2009 Location: Quebec Posts: 100 Trader Rating: (0) Feedback Score: 0 reviews	it's pretty common for old jz to puff a little on startup. usually due to valve seals. as for the sound and the coolant I can't help you on this

02-09-2017, 01:54 PM	#7
240msh Zilvia Member Join Date: Oct 2016 Location: Las Vegas Age: 25 Posts: 238 Trader Rating: (1) Feedback Score: 1 reviews	Yea, quit a while ago but I've been playing a little lately, what rank are you?

02-09-2017, 08:12 PM	#9
240msh Zilvia Member Join Date: Oct 2016 Location: Las Vegas Age: 25 Posts: 238 Trader Rating: (1) Feedback Score: 1 reviews	you got skype or something? i was global over a year ago and then went down to lem/smfc couldnt get ge back because i played esea more lmao, then around September i lost interest and only did stuff with the 240 lmao