can anyone explain this?
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Senior User
Joined: Jun 2003
Posts: 112
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can anyone explain this?
i have a 2002 f150 4.6 liter triton short box reg cab
my exhaust is true duals 4 cats no glasspacks no mufflers wiht 4 inch tips
the first 30 seconds i drive it, its rappier then any chevy with a 350 in it but after it gets warmed up, it gets quieter and doesnt rap at all.
is there somethign wrong with my truck?
my exhaust is true duals 4 cats no glasspacks no mufflers wiht 4 inch tips
the first 30 seconds i drive it, its rappier then any chevy with a 350 in it but after it gets warmed up, it gets quieter and doesnt rap at all.
is there somethign wrong with my truck?
Posting Guru
Joined: May 2004
Posts: 2,161
Likes: 1
From: Prince George, B.C.
I think it has somthing to do with the computer running it rich and the fact that the engine is cold, My '88 chev celebrity was like that, sounded totally different cold then it did when it was running closed loop.
Senior User
Joined: Jun 2004
Posts: 260
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From: Alabama/Florida
Take it to a muffler shop and have them cut the exhaust right behind the manifolds about two inches behind the joint and couple a 2.5 inch pipe to that on each side and run just pipe past where the cats are and put a magnaflow 2.5 inlet and outlet cat back a few feet from the engine near where the muffler would go then add a straight thru design muffler on each side and go another foot and a half and put turndowns. Hook up some mil eliminators and your check engine light will stay off but you will still pass emissions. Very deep powerful sound and you can now get to a check your cats without that frame crossmember in the way.
