Popcorn sound at cold start
Thread Starter
Instructor
Joined: Nov 2009
Posts: 113
Likes: 0
From: Sweden -
Popcorn sound at cold start
My exhaust is making a popping sound at cold start. After a couple of minutes when everything starts to heat up, the popping stops. Does anyone know why?
http://www.facebook.com/v/10150301045625401
http://www.facebook.com/v/10150301045625401
Last edited by Miraculix; Mar 26, 2011 at 12:29 PM.
Intermediate
Joined: Mar 2011
Posts: 43
Likes: 0
From: Aviston Illinois
Stops because the popcorn is all popped...Sorry....couldn't resist!!!
It sounds like the condensation in the exhaust might just be burning off. Might want to watch for steam out the pipes. If that stops at the same time the popping does....probably it and no big deal.
If you smell butter...I was right the first time! :~)
It sounds like the condensation in the exhaust might just be burning off. Might want to watch for steam out the pipes. If that stops at the same time the popping does....probably it and no big deal.
If you smell butter...I was right the first time! :~)
Le Mans Master
Joined: Mar 2009
Posts: 5,280
Likes: 1
From: PALM COAST Flordia
[quote=Vicistheman;1577149830]
It sounds like the condensation in the exhaust might just be burning off. Might want to watch for steam out the pipes. If that stops at the same time the popping does....probably it and no big deal.
quote]
sounds right, that's what our steam pipes do at work. You might want to post in the tech section
It sounds like the condensation in the exhaust might just be burning off. Might want to watch for steam out the pipes. If that stops at the same time the popping does....probably it and no big deal.
quote]
sounds right, that's what our steam pipes do at work. You might want to post in the tech section
Race Director
Joined: Jan 2006
Posts: 10,554
Likes: 33
From: Not on either liberal coast.
The popping could be unburned fuel/rich condition in the exhaust system rather than water condensation.
Lifetime Member
Joined: Dec 2002
Posts: 10,702
Likes: 76
From: New Jersey
St. Jude Donor '05, '12-'13, '15-'16, '21
Stops because the popcorn is all popped...Sorry....couldn't resist!!!
It sounds like the condensation in the exhaust might just be burning off. Might want to watch for steam out the pipes. If that stops at the same time the popping does....probably it and no big deal.
If you smell butter...I was right the first time! :~)
It sounds like the condensation in the exhaust might just be burning off. Might want to watch for steam out the pipes. If that stops at the same time the popping does....probably it and no big deal.
If you smell butter...I was right the first time! :~)
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Thread Starter
Instructor
Joined: Nov 2009
Posts: 113
Likes: 0
From: Sweden -
I don't think so because the car is tuned just right and if that was the problem the popping probably wouldn't stop once the car started to warm up
Thread Starter
Instructor
Joined: Nov 2009
Posts: 113
Likes: 0
From: Sweden -
Don't know if this works but I'll give it a shot
Here's the sound at cold start
http://www.facebook.com/v/10150301045625401
Note that the popping has stopped in the last section of the video when the car has warmed up
Here's the sound at cold start
http://www.facebook.com/v/10150301045625401
Note that the popping has stopped in the last section of the video when the car has warmed up
Last edited by Miraculix; Mar 26, 2011 at 12:26 PM.
Drifting
Joined: Oct 2003
Posts: 1,932
Likes: 4
From: Warrenville Il
Sounds a little excessive and more than just condensation. Also if it was tuned just right the popping might not happen at all, just a suggestion. Looks like you have quite a bit of work going on there, good luck.
Team Owner
Joined: May 2001
Posts: 25,058
Likes: 1,265
From: Virginia
St. Jude Donor '11
Don't know if this works but I'll give it a shot
Here's the sound at cold start
http://www.facebook.com/v/10150301045625401
Note that the popping has stopped in the last section of the video when the car has warmed up
Here's the sound at cold start
http://www.facebook.com/v/10150301045625401
Note that the popping has stopped in the last section of the video when the car has warmed up
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
thus the popping!Are your Catalytic Converters removed too?
Because that would definetely make a huge difference along with the mufflers being removed!!!!
Thanks,Matt
Thread Starter
Instructor
Joined: Nov 2009
Posts: 113
Likes: 0
From: Sweden -
The car sounded exactly the same even before I cut the mufflers off
If I would have a guess it would be the cats, I don't know what brand they are but they're supposed to be "race" according to the previous owner
If I would have a guess it would be the cats, I don't know what brand they are but they're supposed to be "race" according to the previous owner
Thread Starter
Instructor
Joined: Nov 2009
Posts: 113
Likes: 0
From: Sweden -
This is not really a problem for me since the popping goes away after a couple of minutes, I'm just currious as to what causes this. And, well yea it would be great to know whether the engine is going to blow up anytime soon or something but as long as the popping only occurs when the car is cold, I'm not to worried, only curious
Last edited by Miraculix; Mar 26, 2011 at 02:32 PM.
to pinpoint, or at least ballpark, your problems.
