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Naturally Aspirated For you All-Motor lovers

       
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Old Jan 13th, 2005, 04:38 PM   #1 (permalink)
svasica
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noise in engine bay when I turn off car?!

After I turn off the car (01 Nissan Sentra SE), there is a strange noise, like a clicking or something, several seconds after the car is off. It comes from the TB area....what could it be?

Also, is there supposed to be a vacuum tube near the TB area as well that is not attached to anything? I have one just hanging around there, and don't know what it is?
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Old Jan 13th, 2005, 04:55 PM   #2 (permalink)
Terran200sx
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IDK, just guessing though, vaccume relay?
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Old Jan 31st, 2005, 04:25 AM   #3 (permalink)
Aussie John
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the clicking noise will be the " stepper " isc motor spinning back to off position! when you turn the ignition key to "reds" or "on", you will hear the motor spool up, clicking etc! - NORMAL
as for the vacuum hose?? check where it goes it to.. on the aussie spec pulsar, the auto transmission has a breather tube near the air filter box assembly, just sitting there!- NORMAL

hope this helps!
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Old Feb 3rd, 2005, 06:56 PM   #4 (permalink)
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Old Feb 5th, 2005, 07:45 PM   #5 (permalink)
youmolo
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Quote:
Originally Posted by Aussie John
the clicking noise will be the " stepper " isc motor spinning back to off position! when you turn the ignition key to "reds" or "on", you will hear the motor spool up, clicking etc! - NORMAL
as for the vacuum hose?? check where it goes it to.. on the aussie spec pulsar, the auto transmission has a breather tube near the air filter box assembly, just sitting there!- NORMAL

hope this helps!
What's a isc motor? a stater motor?

I have an auto transmission with a rubber tube sticking out with an open end leading to nowhere. tried to find a place to connect the tube to but can't find any. is there any way to find out if that tube is the breather tube?
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Old Feb 5th, 2005, 10:08 PM   #6 (permalink)
asleepz
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Could be from the engine just cooling off. Most engines after shut down will click from the contracting/cooling metal.
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Old Feb 8th, 2005, 07:27 AM   #7 (permalink)
AEM Spec V
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It's actually the TB butterfly valve opening and closing... It's kinda a cachunka-chunk noise... My car does it as well.
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Old Feb 8th, 2005, 07:30 AM   #8 (permalink)
AEM Spec V
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Quote:
Originally Posted by youmolo
What's a isc motor? a stater motor?

I have an auto transmission with a rubber tube sticking out with an open end leading to nowhere. tried to find a place to connect the tube to but can't find any. is there any way to find out if that tube is the breather tube?
The ISC motor is the "Idle Speed Control" motor.

That tube is simply a breather tube for the transmission.
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Old Feb 9th, 2005, 02:56 AM   #9 (permalink)
youmolo
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Originally Posted by ♣AsleepZ♣
Could be from the engine just cooling off. Most engines after shut down will click from the contracting/cooling metal.
yea,my kia does that too. it's a continuous "click" "click" sound that goes on for about a minute. that comes from under the car though.... might be the exhaust pipe.
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Old Feb 9th, 2005, 05:28 AM   #10 (permalink)
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Quote:
Originally Posted by youmolo
yea,my kia does that too. it's a continuous "click" "click" sound that goes on for about a minute. that comes from under the car though.... might be the exhaust pipe.
Them things get mighty toasty, could just be it cooling.
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Old Feb 9th, 2005, 07:17 AM   #11 (permalink)
AEM Spec V
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The *click* *click* *click* noise are the exhaust heat sheilds expanding/contracting (cooling), but the noise immediately following the turning off of the motor would be the TB. Once you replace your stock exhaust you will notice it doesn't make that noise anymore.
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Old Feb 13th, 2005, 07:08 AM   #12 (permalink)
youmolo
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Quote:
Originally Posted by AEM Spec V
The *click* *click* *click* noise are the exhaust heat sheilds expanding/contracting (cooling), but the noise immediately following the turning off of the motor would be the TB. Once you replace your stock exhaust you will notice it doesn't make that noise anymore.
you mean the heat shield under the car? or the one right infront of the engine after the radiator (shielding the exhaust extractors)?
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Old Feb 13th, 2005, 11:13 AM   #13 (permalink)
AEM Spec V
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Quote:
Originally Posted by youmolo
you mean the heat shield under the car? or the one right infront of the engine after the radiator (shielding the exhaust extractors)?
All the same.
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Old Feb 21st, 2005, 09:01 PM   #14 (permalink)
honda9369
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Quote:
Originally Posted by AEM Spec V
The *click* *click* *click* noise are the exhaust heat sheilds expanding/contracting (cooling), but the noise immediately following the turning off of the motor would be the TB. Once you replace your stock exhaust you will notice it doesn't make that noise anymore.
cha-ching
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Old Feb 22nd, 2005, 05:16 PM   #15 (permalink)
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I heard an 84 Z31 with a blown turbo make that noise yesterday. It takes about 5 seconds for it to spool down after the car turns off, I heard a priing priiing priiing clear as a bell after I turned the engine off.
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