exhaust question
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New User
Joined: Sep 2003
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exhaust question
Okay I may sound stupid here but whatever Ive never done this before 
I have a 92 F150 I6, my question is do these truck have 2 cats? Ive read some post saying they do? I thought that I had 1 cat and 1 muffler but the truck is very noisy. half of my system is gone so Im in the dark. did the muffler come after the cats?
Ill be tackling this probably Saturday so any help advice would be great, thanks
I have a 92 F150 I6, my question is do these truck have 2 cats? Ive read some post saying they do? I thought that I had 1 cat and 1 muffler but the truck is very noisy. half of my system is gone so Im in the dark. did the muffler come after the cats?
Ill be tackling this probably Saturday so any help advice would be great, thanks
Senior User
Joined: Jul 2003
Posts: 299
Likes: 2
From: central valley California
your truck has a preconverter and a cat the preconverter forms the Y for the two pipes the exits as one pipe with the cat behind it you will find your O2 sensor prior to the preconverter in the center of the Y. the muffler is indeed behind the cats. I replaced my cats with a hi flow cat and comp muffler I bought both off of the net and saved myself about 1000.00 dollars doing it myself.
since you are going to work on the exhaust system it would be a good time to test your cats for back pressure and plugging. this would save you time and money in the future if you have a bad cat to catch it now not after you put on a new muffler. due to the fact some shops weld the pipes on.
since you are going to work on the exhaust system it would be a good time to test your cats for back pressure and plugging. this would save you time and money in the future if you have a bad cat to catch it now not after you put on a new muffler. due to the fact some shops weld the pipes on.
