ihave a 92 lexus ls 400 .had new cats, timing belt water pump,cap,rotor,plugs wires. car was runing perfect for 6 months all of a sudden lost all power could not go aver 40 .checked underneath the car .the cats were cherry red.what are the probablecauses for this?

Asked by Jun 21, 2012 at 09:50 PM about the 1992 Lexus LS 400 Base

Question type: Maintenance & Repair

what would cause brand new cats to go bad?

1 Answer

216,595

Unburnt fuel getting into your exhaust will cause the cats to get blocked. So with all the parts you mentioned being replaced, I didn;'see the ignition coil/coils. You should have noticed a miss or ruff running engine, no? A check engine light?

2 out of 2 people think this is helpful.

Your Answer

Add photo

Search Lexus LS 400 Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Lexus LS 400 Experts

#1 Tom Demyan
Tom Demyan
Reputation 410
#2 FordNut
FordNut
Reputation 350
#3 dandyoun
dandyoun
Reputation 210
View All

Related Models For Sale

Used Lexus GS 300
29 Great Deals out of 891 listings starting at $3,168
Used Lexus ES 300
18 Great Deals out of 1,067 listings starting at $2,499
Used Toyota Camry
1,196 Great Deals out of 93,150 listings starting at $700
Used Honda Accord
1,084 Great Deals out of 76,808 listings starting at $1,395
Used BMW 3 Series
1,528 Great Deals out of 39,679 listings starting at $1,495