bad cats
Posting Legend
Joined: Feb 2004
Posts: 32,025
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From: Where Critters Are Free
Originally Posted by ericnj75
how can you tell if your cats are bad.
When a mouse runs by and the cat just sits there and does nothing...LOL. Or the cat does not use his litter box. Chews on everything Etc Etc
Junior User
Joined: Jul 2006
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From: Only the govt. knows
Originally Posted by sglaine
When a mouse runs by and the cat just sits there and does nothing...LOL. Or the cat does not use his litter box. Chews on everything Etc EtcAnyway, usually, if your truck is running sluggish as hell. Or you smell something like rotten eggs. or if your ECM thew a code. One of the three.
Posting Legend
Joined: Feb 2004
Posts: 32,025
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From: Where Critters Are Free
Originally Posted by crackerteg
That's the second time I see a reply like that to the same question by the same guy! LOL
Anyway, usually, if your truck is running sluggish as hell. Or you smell something like rotten eggs. or if your ECM thew a code. One of the three.
Anyway, usually, if your truck is running sluggish as hell. Or you smell something like rotten eggs. or if your ECM thew a code. One of the three.
I just had to throw out a little humor..After all just look how he asked the question.
A good laugh is great for any good Man and woman..
But you are correct on what you said
Freshman User
Joined: Sep 2005
Posts: 42
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From: Ottawa
Rattling sounds...
Originally Posted by crackerteg
Anyway, usually, if your truck is running sluggish as hell. Or you smell something like rotten eggs. or if your ECM thew a code. One of the three.
Mine rattled a lot - especially noticeable at idle (usually at a drive through order window
).I thought it was the muffler making all that noise, but it was the driver side cat.
I wonder if the backpressure from a faulty cat contributes to the ejection of plugs... just a theory.
Anyway, I hope that gives you a little more to go on.
Fleet Owner
Joined: Mar 2003
Posts: 24,724
Likes: 74
From: Blue Hill Township
I've got a few words of advice for ya as I just dealt with the same thing. I'll post up after I get back this evening.
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Fleet Owner
Joined: Mar 2003
Posts: 24,724
Likes: 74
From: Blue Hill Township
Alright, finally got back. We just dealt with bad cats in the 2000 Expy with the 5.4. The truck was really lacking power and sucking wind. I could also smell sulfur when I was behind it in my car and the truck was pulling a small pop up. Ended up replacing both front and rear cats with a pair of universals and it has its power back as well as sounding a little throatier. I pulled a 25' enclosed trailer weighing in at 7500lbs with the clogged cats and averaged 6.7mpg for the trip. After replacing the cats I averaged almost 9mpg and the trailer on this next trip was 2000lbs heavier.
Long story short, if the truck is sucking wind and smells like sulfur then the cats are probably toast. You can try pulling out the front O2 sensor and feeling for back pressure while the truck is running.
Long story short, if the truck is sucking wind and smells like sulfur then the cats are probably toast. You can try pulling out the front O2 sensor and feeling for back pressure while the truck is running.
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