After stopping and turning off the engine ('98 4.6L) I hear constant snap, crackle, and popping as the exhaust system cools and contracts. It sounds like it's in the cats and forward. Has anyone had this and eliminated or reduced the noise? I don't think it's affecting anything adversely, but is a little annoying and something of a head turner for the wrong reasons!

Thanks,
David A.
1998 F150, 4.6L, 4X4 Off-Road...

 

GOT MILK??? to go w/snap-crackle-pop
Seriously it sounds like it's just your truck cooling down. I have a couple of kids in the back seat yelling so I never notice those noises

 

Thanks, Tina - Figured it was "normal" for the truck. It just sounds a little tacky! I have three kids who, when I stop and turn off the engine, until they disappear in a cloud of bickering, laughter, and dust, mask the noise, too!

 

The guy at my local muffler shop told me that stainless steel will make alot of popping noise when cooling down. Maybe they use stainless steel in the exhaust system.

 

You guys should hear a V10 when it's new. It sounds like a hundred guys shooting BB guns inside a tin can....Thank goodness it stopped.

 

After you get some miles on it the snap noise will stop.

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Nastruck1-4.6-377s-Superchip-K&N GenII-Dynomax RaceMag With Roush tips-MPC bug shield-40-60 black tint windows-class3 drawbar hitch.Polk speakers.

 

I've got 15k on mine and it still does that while cooling down... Doesn't bother me though.


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keith@myf150.com
http://www.myf150.com
Rocky Mount, NC

1999 F-150 XLT Styleside, Black On Black, SuperCab, Short Bed, 4x4, ORP, 4.6L Auto, 3.55LS

Mods: DrawTite Class III Hitch, Smittybilt Outland Grill Guard/Brush Guards, KC Daylighters, Custom Dual Exhaust-Straight Out The Back, Airaid FIPK, SuperChips Chip, Bug Deflector, Pace-Edwards Roll-Top Bed Cover

 

My truck did that really bad even when it was running. It has finally almost completely stopped after two months and 2000 miles. I think it is condensation in the catalytic converters and the stainless steel developing a memory.

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'99 XLT S/C 4.6 Auto 3.55 LS Oxford White,Orlando appearance package, trailer tow package, keyless entry, A.R.E. Hard tonneau, ventvisors and bug guard all painted to match, limo tint, 5 spoke aluminum wheels, Kenwood 6 Disc, black Back Country nerfs, Buccaneers front license plate! I Luv it!