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#41477 05/03/02 01:18 PM
Joined: Dec 2001
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ok....i did the mystery mod back in xmas time....now that weather is better i rolled down my windows and i noticed i have a profound rattle sound coming from the exhaust...i thought i had noticed before but too lazy to roll down window at time....but was wondering if anyone might have an idea to get rid of this annoying rattle that happens in the rpm range between 2900 and 4000 rpms weird to me....anyone have any ideas?????

cam
cool


98 tour SE
Resonatorless
Gutted cats
some speakers
A little bobbin head cat watchin every1 pass
and ford mud flaps(darn fishin trips keep me muddy)
added all terrain tires(i like to pretend im rally racing, whne not really racing)
#41478 05/03/02 01:29 PM
Joined: Oct 2001
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Sounds like you haven't fully removed the ceramic lining from inside the pre-cats, or you have a new problem with your main cat. And if you have a problem with your main cat making that noise then you probably have a problem with your fuel system as well.


2000 Contour 2.5L ATX (Medium Steel Blue)

Items for Sale
  • SVT Indiglo Guages (NEW)
  • Traction Control/Rear Defrost Switch (NEW)
  • V6 Speedometer/Guage Cluster w/ Tach (51k miles)
#41479 05/03/02 01:38 PM
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Rattle or buzz? I get a buzz from my mystery mod at certain rpms (resonance).


Regards,
Anastazi
Father of the Aussie Bar
anastazi.sarigiannis@aam.com

"Computer games don't affect kids. I mean if Pacman affected us as kids, we'd all run around in a darkened room, munching pills and listening to repetitive music."
-----------------------------------

2000 Silver Frost SVT #1126 of 2150
8" AFE/"Big-Mouth" Intake, Modified BAT Pipe, IAT Mod - A'PEXi S-AFC, Superchip, No Secondaries, Cobra/CSVT Hybrid MAF, Magnaflow True Duals, MYSTERY Mod, Autolite AWSF22FS's and FMS Wires, ES MM Inserts, Cross Drilled/Slotted Rotors w/ Greenstuffs, APR DTM Spoiler, Escort Cossie Vents, NACA Duct, Mirko Splitter, Koni's & H&R Springs, 24mm "Aussie" Sway Bar, 18" Enkei RS-5, 225/40R18 KDW-2's.
Pioneer DEH-P7000R, TS-6975's, TS-6855's, MTX BE104, MTX Blue Thunder PRO502
http://www.geocities.com/qikslvrsvt
#41480 05/03/02 03:15 PM
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its a rattle sound...doesnt sound like rasp...its almost like the exhaust sheild is bumping around or something....i have undone the exhaust and nothing in the pre cats...so maybe i need a knew cat alltogether or something....the rattle only occurs in gear while moving of course....i cant get it to do the rattle while sitting parked.....?????


98 tour SE
Resonatorless
Gutted cats
some speakers
A little bobbin head cat watchin every1 pass
and ford mud flaps(darn fishin trips keep me muddy)
added all terrain tires(i like to pretend im rally racing, whne not really racing)
#41481 05/05/02 12:36 AM
Joined: Nov 2001
Posts: 515
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Might be ping too....

Try regane or an octane booster or hi-test gas. If rattle goes away, then you have a pinging problem.

If not, somethings loose.


"My Name is Richard. I am a Contouraholic."
1999 SE Sport Duratec ATX Spruce Green; Drop--In K&N Filter; VentShades;
Fog Lamp Fix Mod & PIAA510s with Bumper Braces & Stock Type aiming screw mod;
PIAA 9006 Super White Headlamps
AIWA CDC-MP3 HU; WeatherTech Mats
Viper 600ESP w/Remote entry
#41482 05/05/02 12:40 PM
Joined: Mar 2001
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I had a rattle like the one you described. It turned out to be the heat shield on my cat. Its to prevent grass fires.. or something like that. I just took it to a muffler shop and they popped it off for me.. They told me it was pointless to keep it on. Good luck.


metallic teal 95 mystique V6 ATX

debadged-no door dings-K&N filter-no hoodliner-SVT exhaust (thanks steve!)- Powdercoated Black E1s -SE side skirts in the garage! LED stereo and door handle lights

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