hey guys im having this problem where my catback keeps melting....just the other night wen i was driving my car on the freeway the car start to jolt then suddenly this clanking noise start to come on...& i know its the cat back again bcoz i have had this happen b4...i replaced my catback 3 times already in 3 months & its costing me.....wat do u reckons causing dis problem maybe a bad ignition system??, spark?, or replace spark plugs but ive got the iridium ones in there .... the engine is a silvertop 20v & i always put premium unleaded
cheers ramon
you must be running uber rich to get enouh unburnt petrol stuck in the cat.
spark timing might be an contributor (e.g. firing too late at higher rpm), but choice of plugs isn't going to dramatically affect the life of a catalytic convertor.
have you disabled/broken the O2 sensor? ECU might trying to run closed-loop and if it gets erronious or suspect O2 sensor signals it will incorectly fuel the motor at cruise and idle (e.g. ECU might think engine is hovering around stoich, when in fact it's so out of tune, the cat's turned into a furnace).
Sat, 14 August 2004 02:28
