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post #1 of 20 (permalink) Old 04-09-2010, 10:38 AM Thread Starter
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Very hot cats normal?

I have a '97 with the 4.6 and my driver side cat gets pretty hot. The floor board gets warm and my ankle just about gets cooked when I get out due to the heat coming of the cat.

I'm not getting any codes for the convertors. I had a '92 with the 3.8 and it did it was the same way and never threw a code for the cats.

Is this normal or do I have a cat that is starting to plug?
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post #2 of 20 (permalink) Old 04-09-2010, 12:06 PM
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Doesn't sound normal, I can drive my car to Tennessee (12 hours) and not have that happen.

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post #3 of 20 (permalink) Old 04-09-2010, 12:10 PM
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I dont think you should be able to feel the heat through the floor board but cat's are suppousto get hot thats how they work.

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post #4 of 20 (permalink) Old 04-09-2010, 12:51 PM
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yep sounds like a clogged cat, Invest in some Hi-Flow cats for your V8

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post #5 of 20 (permalink) Old 04-09-2010, 01:44 PM
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While someone else is on the subject,and sorry to jump in.

Anyone have/know what model universal magnaflow that would fit into the stock setup without having to replace the whole front section. I want to be able to hand the new cats to my local mechanic to be welded in without to much fab work.

My cel has been on throwing a bad cat code for some time. The car does run ok but when I disconnected the battery to swap my starter it reset the computer and boy could I tell the difference.

Thanks for any info.
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post #6 of 20 (permalink) Old 04-09-2010, 01:53 PM
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I have the same cooked leg syndrome. really sucks on the long drives from NC to FL


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post #7 of 20 (permalink) Old 04-09-2010, 02:42 PM
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I'm surprised nobody mentioned the heat shields. Take a look and be sure they're intact.

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post #8 of 20 (permalink) Old 04-09-2010, 07:25 PM
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also make sure that you dont have any misfires. If the car is running rich then it will heat the cats up more. it may not throw a code but check your plugs see if they smell like gas or are black. but the other ideas that people have posted are good things to check too.

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post #9 of 20 (permalink) Old 04-09-2010, 08:27 PM
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Home Remedy

I know how a lot of people feel about "home grown" fixes, but a temporary fix that may work well is to get a piece of that aluminum face styrofoam insulation that's used on houses (comes in 4'x8' sheets in 1/2" and 3/8" thick). Put a piece under your carpet with the foil side facing down (toward the heat) - that stuff works incredible as a heat barrier.

Or maybe a piece of that concrete board they use to surround stoves as a heat barrier - I think you can get that stuff as thin as 1/4", maybe thinner.
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post #10 of 20 (permalink) Old 04-09-2010, 08:50 PM
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I drove an old camper van to my 4th of July campout last year. As bad as the heat thru the doghouse was, I was able to block it with one of the insulated bags you can buy at the grocery store. You should figure out what the problem is but that should help you from cooking your leg in the mean time.
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post #11 of 20 (permalink) Old 04-10-2010, 09:11 AM Thread Starter
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I't's not getting hot enough inside the car to cook my leg. It is when I get out and set my foot on the ground that cooks my leg.

I don't notice the heat if the engine is off when I step out. It's when the engine is running.

I'm going to pick up a laser thermometer this weekend and get some actual temperatures of the cats.
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post #12 of 20 (permalink) Old 04-10-2010, 09:22 AM
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Quote:
Originally Posted by LOLA View Post
I't's not getting hot enough inside the car to cook my leg. It is when I get out and set my foot on the ground that cooks my leg.

I don't notice the heat if the engine is off when I step out. It's when the engine is running.

I'm going to pick up a laser thermometer this weekend and get some actual temperatures of the cats.
The temperature of a normal catalytic converter to operate around minimum of 500*F, and they're supposed to be designed to handle up to 1,600*F or so. Make sure your gauge goes pretty high...lol
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post #13 of 20 (permalink) Old 04-10-2010, 09:32 AM
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Just throwing this out there FWIW.

If the car is running and is hot/not moving/parked and the radiator fan kicks on, all the hot air that is sucked past the radiator then blown past the engine gets channeled under the car. If I leave the car idling long enough and the fan kicks on, put my feet out the door and onto the driveway, I can feel quite a bit of heat.

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post #14 of 20 (permalink) Old 04-10-2010, 10:32 AM
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SlowProject and anyone else interested in high-flow Magnaflow cats:

<< Anyone have/know what model universal magnaflow that would fit into the stock setup without having to replace the whole front section. I want to be able to hand the new cats to my local mechanic to be welded in without to much fab work. >>

Look on eBay for the Magnaflow # 94004 high-flow cats. I have them on my TBird and they work great, looking to get a pair as well for my Mark VIII LSC. Looks like prices are going from $52 to $67 each. Seems to be around 580 listings for them so they're plentiful.

In my case I also went with a mid-mount Magnaflow 11385 dual in/dual out muffler where the 3rd cat used to be, dumping out to NAPA chrome tips.

Good luck!

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post #15 of 20 (permalink) Old 04-11-2010, 09:35 AM Thread Starter
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Well it threw a P0430 code yesterday. I did like any good member should do and did a search

I cleaned the MAF as it was pretty dirty then cleared the code. I'll see if this fixes it.
I do have close to 193k on my Cougar so it's possible the cat is bad.

I have been wanting to go with some high flow cats.

Last edited by LOLA; 04-17-2010 at 12:12 AM.
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post #16 of 20 (permalink) Old 04-11-2010, 09:37 AM
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Then look for the 94004 on the 'Bay.

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post #17 of 20 (permalink) Old 04-17-2010, 12:09 AM Thread Starter
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Well the P0430 came back tonight. I have a pair of the Magnaflow 94004 on the way from Summit
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post #18 of 20 (permalink) Old 08-28-2010, 10:21 AM
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If anyone is still watching this thread and had the 94004 Magnaflows installed please chime in. I need to start fixing this car and I think the cats are first on the list. I bought a set of the above mentioned magnaflows and took them up to my local mechanic. First he told me to go to a chain muffler shop then backtracked and said he would do the install but it would not turn off the cel and would not warranty the work (understandable with supplying my own parts). So my question is, did swapping out for these cats turn off the bad cat cel?, and while I'm at it what should be a decent price to pay to have the front two cats welded in?

Thanks for any input.
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post #19 of 20 (permalink) Old 08-28-2010, 10:29 AM
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I have 2 94004 Magnaflow cats on my 97 Tbird Limited Edition, they've been on for just over 2 years and no problems at all for me. They feed into a mid mounted dual in/dual out Magnaflow #11385 where the 3rd cat/resonator used to be. There's a deep drone and I would have preferred a mid mount dual in/dual out Flowmaster 40 series. On my Mark I have a Flowmaster 50 series dual in/dual out that sounds decent with no drone.

I got a good deal from a local muffler shop for the entire install with pipes as loing as I supplied my own parts except pipes, which they had. I had to supply the cats, screws for the 02 sensors, muffler, and NAPA tips. I have no idea what the going rate is for just installing the cats.

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post #20 of 20 (permalink) Old 08-28-2010, 11:09 AM Thread Starter
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I have yet to put the Magnaflow cats on yet as I decided I want to have dual exhaust put on at the same time. I'm hoping to be able to have it done in about three weeks.

I'll report back with what I have done.
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