Are my cats bad? Any advice?
03-20-2008, 09:26 PM
#1
2nd Gear Member
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Are my cats bad? Any advice?
I have a 95 5.0 and my car seems to over heat in traffic but cools right down when i start moving again, im wondering if my cats maybe bad, i hear a rattling noise coming from my cats its annoying so any advice? i have a xpipe with stock cats thanks for your time
03-20-2008, 11:44 PM
#2
3rd Gear Member
Join Date: Jul 2005
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RE: Are my cats bad? Any advice?
take the cats off and go off road h pipe. check fan and see if the motor is working properly. i have a friend with a 94 and his fan was working but not strong enough. what thermostat are you running?
03-21-2008, 07:20 AM
#4
6th Gear Member
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RE: Are my cats bad? Any advice?
has it always been this way ?
the rattling is probably the heat shield rusting off , rip it off
if you used a t-stat w/ no check ball in it...you will have that problem at idle
the rattling is probably the heat shield rusting off , rip it off
if you used a t-stat w/ no check ball in it...you will have that problem at idle
03-21-2008, 12:47 PM
#6
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RE: Are my cats bad? Any advice?
im thinking about taking my cats off, they prolly hold back power, and i dont have any coolant just strait water maybe thats the cooling issue because its not that bad. anyone know how to tell if the cats are bad?
03-21-2008, 12:52 PM
#7
The Rogue Mod
Join Date: Feb 2006
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RE: Are my cats bad? Any advice?
Usually the cats clog, causing lack of power.Or come apart and rattle like hell. The problem you describe sounds like a flow problem. What does the inside of the radiator look like.
03-21-2008, 01:15 PM
#8
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RE: Are my cats bad? Any advice?
yea i would check you fan, see if anythign is in the radiator, and get some coolant mixed in with that water, i hear it is bad after i while to run straight water in there, it causes some kind of lime build up or some crap...but did you add the stock cats to a offroad x???
03-21-2008, 01:40 PM
#9
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RE: Are my cats bad? Any advice?
Someone already mentioned thermostat. Start there, they are cheap and easy to replace. Also, how close are you monitoring your car's over heating? If you are within just a few degrees, it may just be the lack of air going through your car when you are driving. That's why I always hook up my temp gauge as well as the factory one in the dash. That way you can monitor what temp your thermostat opens at, but not be alarmed everytime the new gauge rises a bit.
03-21-2008, 10:10 PM
#10
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RE: Are my cats bad? Any advice?
On a firebird i had the cats had gone bad. The exhaust place told me that overtime they break apart and cause a really annoying rattle that sounds like a rock in a can. Relplaced the cat and no more rattle.