Popping noise?

hotshot13422 · 06-19-2007, 09:41 AM

I have a 2002 v6 mustang stock exhaust(for now) and everytime i turn off my car there is a popping coming from underneath my car. I looked under there and it sounds like its coming from the cats. Also there is a clear looking liquid that is dripping from what looks like just after the Exhaust Manifold. It usually drips out a nice little puddle but it doesnt stain it just evaporates. So I'm getting a new H-pipe with a gt take off and some flows soon. Is this a big deal or can i just wait until i get my new exhaust to have it checked out?

v6'stang · 06-19-2007, 03:22 PM

Quote:

Originally Posted by hotshot13422

I have a 2002 v6 mustang stock exhaust(for now) and everytime i turn off my car there is a popping coming from underneath my car. I looked under there and it sounds like its coming from the cats. Also there is a clear looking liquid that is dripping from what looks like just after the Exhaust Manifold. It usually drips out a nice little puddle but it doesnt stain it just evaporates. So I'm getting a new H-pipe with a gt take off and some flows soon. Is this a big deal or can i just wait until i get my new exhaust to have it checked out?

nah dude, it's normal. it's the a/c dripping down, landing on the exhauste pipes, making a psh sound then hittin' tha ground. perfectly normal. if you don't use ur a/c and drive around for a bit, come back and park it, it won't make that sound.

Cheddarbob · 06-19-2007, 04:57 PM

yeah just normal
it does that on every car that i have owned and drove

hotshot13422 · 06-19-2007, 06:33 PM

I didnt think so but i dont want to take a chance

v6'stang · 06-19-2007, 06:59 PM

no doubt, that's why we're here!

simbill · 07-01-2007, 08:31 PM

see now i have the same popping noise, sounds like its coming from my cold air intake's cone actually, or even the throttle body..ya know that general region. No fluid, almost sounds as if its pushing air the opposite direction through the cone filter

v6'stang · 07-01-2007, 08:39 PM

does it do it when ur a/c hasn't been run in a while? "in a while" meaning 20 min or more.

simbill · 07-01-2007, 08:52 PM

Quote:

Originally Posted by v6'stang

does it do it when ur a/c hasn't been run in a while? "in a while" meaning 20 min or more.

mine does it always, sometimes the car jumps a little bit when it happens too..

97_Cobra_Droptop · 07-02-2007, 08:16 AM

Ok, sounds like people are confused. The popping sound and the water from the a/c are two completely separate independent issues. The water drip has already been cleared up, so we can leave the a/c out of this, I strongly, strongly doubt it has anything to do with the popping sound.

hotshot13422 · 07-02-2007, 08:19 AM

Well since this thread is back... my popping noise stopped when they swapped out my exhaust. I dont know if they re-routed everything in a different position, but since i got my new exhaust my popping has stopped

v6'stang · 07-02-2007, 02:08 PM

hmm, ya got me...

great03mustang · 07-08-2007, 12:25 AM

I hear EVERY noise my car makes! So, the water is probably condensation off the A/C. My dad's an HVAC tech and my fabricator/mechanic confirmed that's what that noise/wetness is.

Secondly, the popping I heard once was a broken aftermarket cat (situations with bad MAC and PYPES cats). After turning off the car, getting out, and closing the door, the exhaust was already cooling down and settling out. The popping was the inner core of the cat falling back down to the bottom of the cat. It's light enough material that raises and gets blown backward (toward the midpipe) as the car's air/fuel ratio is exerted as exhaust flow. So, the hotter it got, the more malleable the core got, and the more the heat/air allowed the midpipe to cut into the core as it got blown backward toward it.

Never had experience with broken stock cats, but you could inquire at your local Ford dealership. The EPA has a federally mandated emissions warranty/guarantee on stock cats - 8 years/80,000 miles. Ask about it! If you're in the time/mileage frame, be sure they give you new cats for FREE!!!

Gosh I hope that makes sense! Email me if you don't get it. I can take a pic of the broken cat I have in the garage. Best of luck!

06-19-2007, 09:41 AM	#1 (permalink)
hotshot13422 Senior Member Join Date: Jun 2007 Location: Edmond, Oklahoma Posts: 110	Popping noise? I have a 2002 v6 mustang stock exhaust(for now) and everytime i turn off my car there is a popping coming from underneath my car. I looked under there and it sounds like its coming from the cats. Also there is a clear looking liquid that is dripping from what looks like just after the Exhaust Manifold. It usually drips out a nice little puddle but it doesnt stain it just evaporates. So I'm getting a new H-pipe with a gt take off and some flows soon. Is this a big deal or can i just wait until i get my new exhaust to have it checked out?

06-19-2007, 04:57 PM	#3 (permalink)
Cheddarbob Haul ass on regular gas Join Date: Oct 2006 Location: San Diego, CA/ Putney, VT Posts: 2,101	yeah just normal it does that on every car that i have owned and drove __________________ 2000 V6 mustang, K&N FIPK II, True Dual Flowmaster Super 44's, DiabloSport tuner, 9mm Stang wires, Smoked Headlights, Mach 1 chin spoiler, Mach 1 grille delete, smoked tail light tint,GT rear bumper,12in Rockford Fosgate Sub w/a 600 Watt Rockford Amp, Tinted windows 5% back 35% front. SOLD

06-19-2007, 06:59 PM	#5 (permalink)
v6'stang Senior Member Join Date: Mar 2005 Location: FL Posts: 936	no doubt, that's why we're here! __________________ Mods: 17x9 black cobra wheels, BBK CAI, tru dual flowmasters, sct 4bank elim. chip, motive 3.73's, frpp t-lok. ...and the list grows.

07-01-2007, 08:31 PM	#6 (permalink)
simbill Member Join Date: Oct 2006 Posts: 62	see now i have the same popping noise, sounds like its coming from my cold air intake's cone actually, or even the throttle body..ya know that general region. No fluid, almost sounds as if its pushing air the opposite direction through the cone filter __________________ Red 2002 V6 Convertbile AmericanMuscle CAI Pypes True Dual Exhaust With High Flow Mini-Cats Violator Mufflers Ford Racing Cross Drilled & Slotted Rotors 4.10 Gears w/ T-Lok (posi ) Shorty Antenna Viper 5900 Security & Remote Start Full 15% Tints 7/30/07: Custom SCT Xcal Dyno Tune @ JD's Performance, PA

07-01-2007, 08:39 PM	#7 (permalink)
v6'stang Senior Member Join Date: Mar 2005 Location: FL Posts: 936	does it do it when ur a/c hasn't been run in a while? "in a while" meaning 20 min or more. __________________ Mods: 17x9 black cobra wheels, BBK CAI, tru dual flowmasters, sct 4bank elim. chip, motive 3.73's, frpp t-lok. ...and the list grows.

06-19-2007, 06:33 PM	#4 (permalink)
hotshot13422 Senior Member Join Date: Jun 2007 Location: Edmond, Oklahoma Posts: 110	I didnt think so but i dont want to take a chance

07-02-2007, 08:16 AM	#9 (permalink)
97_Cobra_Droptop Broke Member Join Date: Apr 2006 Location: MN Posts: 107	Ok, sounds like people are confused. The popping sound and the water from the a/c are two completely separate independent issues. The water drip has already been cleared up, so we can leave the a/c out of this, I strongly, strongly doubt it has anything to do with the popping sound. __________________ 97 Triple Black Cobra Convertible wanted to buy: 17x8 wheels for an 01 V6

07-02-2007, 08:19 AM	#10 (permalink)
hotshot13422 Senior Member Join Date: Jun 2007 Location: Edmond, Oklahoma Posts: 110	Well since this thread is back... my popping noise stopped when they swapped out my exhaust. I dont know if they re-routed everything in a different position, but since i got my new exhaust my popping has stopped __________________ 2002 White Mustang v6(charchol Interior) 5% tint all around, Blacked out headlights, Black bumper inserts, Roush Lower Bumper Insert, Custom 2.25in exhaust with a catted h-pipe and super 40's dumped

07-02-2007, 02:08 PM	#11 (permalink)
v6'stang Senior Member Join Date: Mar 2005 Location: FL Posts: 936	hmm, ya got me... __________________ Mods: 17x9 black cobra wheels, BBK CAI, tru dual flowmasters, sct 4bank elim. chip, motive 3.73's, frpp t-lok. ...and the list grows.

07-08-2007, 12:25 AM	#12 (permalink)
great03mustang Junior Member Join Date: Jul 2007 Location: VA Posts: 5	I hear EVERY noise my car makes! So, the water is probably condensation off the A/C. My dad's an HVAC tech and my fabricator/mechanic confirmed that's what that noise/wetness is. Secondly, the popping I heard once was a broken aftermarket cat (situations with bad MAC and PYPES cats). After turning off the car, getting out, and closing the door, the exhaust was already cooling down and settling out. The popping was the inner core of the cat falling back down to the bottom of the cat. It's light enough material that raises and gets blown backward (toward the midpipe) as the car's air/fuel ratio is exerted as exhaust flow. So, the hotter it got, the more malleable the core got, and the more the heat/air allowed the midpipe to cut into the core as it got blown backward toward it. Never had experience with broken stock cats, but you could inquire at your local Ford dealership. The EPA has a federally mandated emissions warranty/guarantee on stock cats - 8 years/80,000 miles. Ask about it! If you're in the time/mileage frame, be sure they give you new cats for FREE!!! Gosh I hope that makes sense! Email me if you don't get it. I can take a pic of the broken cat I have in the garage. Best of luck!

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