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Exhaust smell

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Old 10-20-2016, 06:58 PM
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Default Exhaust smell

Hello Y'all, new to this forum!
I have a 2006 F150 5.4 Fx4 with a new Corsa exhaust. Over the past few months I've noticed the exhaust has stunk really bad on idle when cold. After a long road trip you don't notice it. No check engine light. I started noticing it after I replaced my spark plugs. Anything I should be worried about? I also have a whine from the engine bay when it's cold, it's just a slight whine. Anyone else had these issues? Thank you!
Old 10-21-2016, 05:17 AM
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Is this smell in the cab?
Old 10-21-2016, 05:57 AM
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Does it smell like rotten eggs ? The whine may be an idler pulley..
Old 10-21-2016, 07:45 AM
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Originally Posted by 06F150fx4Flowmaster
I started noticing it after I replaced my spark plugs.
Possible loose spark plug...did you torque them?
Old 10-21-2016, 08:17 AM
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Originally Posted by SCORGE
Is this smell in the cab?
No sir
Old 10-21-2016, 08:19 AM
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Originally Posted by techrep
Does it smell like rotten eggs ? The whine may be an idler pulley..
no rotten eggs smell, just gassy
Old 10-21-2016, 08:20 AM
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Originally Posted by EBC-150
Possible loose spark plug...did you torque them?
no I didn't, I didn't do the plugs
Old 10-21-2016, 10:36 AM
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It's possible one may be starting to back out. Have them re-torqued to 28 ft-lbs and see if the smell goes away.




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