cats gone bad??
Thread Starter
Melting Slicks
Joined: Aug 2006
Posts: 2,615
Likes: 694
cats gone bad??
how would one know that their catalytic converter(s) have gone bad. i hear a constant low volume metallic clanging when i drive(sounds like it is coming from engine area around my feet) ...nothing during start up or idle and the sound is not there all the time.
the sound is more prevalent after the car has warmed up, but i have heard it when it is cold as well.
the more gas i give it, the louder the sound. could it be engine knock, pinging, exhaust leak, cats?
is there a heat shield that could be loose....i looked under the car and did not find anything really loose.
any ideas would be appreciated.
the sound is more prevalent after the car has warmed up, but i have heard it when it is cold as well.
the more gas i give it, the louder the sound. could it be engine knock, pinging, exhaust leak, cats?
is there a heat shield that could be loose....i looked under the car and did not find anything really loose.
any ideas would be appreciated.
Last edited by c54u; Nov 20, 2010 at 05:32 PM.
A failing CAT will generate an error code and check engine light.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 808
From: West coast CA
how would one know that their catalytic converter(s) have gone bad. i hear a constant low volume metallic clanging when i drive(sounds like it is coming from engine area around my feet) ...nothing during start up or idle and the sound is not there all the time.
the sound is more prevalent after the car has warmed up, but i have heard it when it is cold as well.
the more gas i give it, the louder the sound. could it be engine knock, pinging, exhaust leak, cats?
is there a heat shield that could be loose....i looked under the car and did not find anything really loose.
any ideas would be appreciated.
the sound is more prevalent after the car has warmed up, but i have heard it when it is cold as well.
the more gas i give it, the louder the sound. could it be engine knock, pinging, exhaust leak, cats?
is there a heat shield that could be loose....i looked under the car and did not find anything really loose.
any ideas would be appreciated.
Check your harmonic balancer. Sometimes the runout gets so bad they start banging in to the front cover.
