major power lost, cats glowing
10-23-04, 10:47 AM
#1
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major power lost, cats glowing
Hello Guys,
I've got an 94 LS 400 with 114,000 miles on it. Until this last week, it's been mainly trouble free. I went out of town and came home to start the car and everything seemed fine. UNTIL i drove it. I noticed a MAJOR power loss and the engine just would not rev. After about 5 minutes of this I looked under the car and found the cats were glowing red. I've since changed the cats thinking it was the cats that were bad, the problem still exsist. My buddy who is a tech at the local Lexus dealership was baffled as well. He says that it could be the resonator that's clogged and backing everything up to the cats. What do you guys think? Any input would be greatly appreciated! TIA!
Homer
I've got an 94 LS 400 with 114,000 miles on it. Until this last week, it's been mainly trouble free. I went out of town and came home to start the car and everything seemed fine. UNTIL i drove it. I noticed a MAJOR power loss and the engine just would not rev. After about 5 minutes of this I looked under the car and found the cats were glowing red. I've since changed the cats thinking it was the cats that were bad, the problem still exsist. My buddy who is a tech at the local Lexus dealership was baffled as well. He says that it could be the resonator that's clogged and backing everything up to the cats. What do you guys think? Any input would be greatly appreciated! TIA!
Homer
10-23-04, 01:42 PM
#2
Sounds like some restriction in the exhaust...check both sides to see if it is flowing. Start removing the sections from the rear one by one and testing, remove the rear mifflers, start the car. Remove the silencers, start the car. Remove the center section...
I've heard of critters climbing into an exhaust so depending on if you are in critter country...any new smells?
I've heard of critters climbing into an exhaust so depending on if you are in critter country...any new smells?
10-23-04, 03:16 PM
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time to replace the cat... clogged up with crap... once replace it should be fine... i had a problem on my 1997 ford crown victoria, it glow like a *****... hahaha...
10-23-04, 08:49 PM
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That's the next step, going to replace the resonator/h-pipe. I've already replaced the cats. I will also check for anything that might have crawled into the tail pipes. Thanks guys.
Homer
Homer
11-05-05, 10:44 AM
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If the cats have got that hot, they may be bad again. I hate to say that knowing you just put probably major money into them, but when they get that hot they start to break down inside. In other words they are probably not working as cats anymore, just melted guts in em now..... others here may have a different opinion......anyone? I would like to know the general consensus about this myself.......
11-05-05, 03:26 PM
#6
Originally Posted by bitsbucket
If the cats have got that hot, they may be bad again. I hate to say that knowing you just put probably major money into them, but when they get that hot they start to break down inside. In other words they are probably not working as cats anymore, just melted guts in em now..... others here may have a different opinion......anyone? I would like to know the general consensus about this myself.......
11-05-05, 04:03 PM
#7
Old thread...would have been curious to learn what the outcome was. Last long on was April. 
Thinking about this, I wonder if he had a dead cyinder or two...meaning poor spark and hence the fuel is not being ignited. All that unburnt stuff will not be good for the cats...
Thinking about this, I wonder if he had a dead cyinder or two...meaning poor spark and hence the fuel is not being ignited. All that unburnt stuff will not be good for the cats...
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