yes it can the ceramic inside of it may have been damaged somehow. usually by having a accident from what i have heard. but my Lincoln does the same thing. its not going to be a major problem as long as you can bear the noise.
No, very doubtful.
Could be the heat shield on the catalytic converter May be a bad bearing in one of the belt driven accesories i.e. Water pump Alternator Belt tensioner Idler pulley etc.
Could be an exhaust leak close to the engine or a bad catalytic converter. It also could be a bad mass airflow sensor.
loud rattling noise when idling.
Yes, "sparkling plugs" is definitely detrimental to idling or smooth running of an engine
I experienced poor acceleration in my '95 Chevy blazer, which eventually became so severe that when accelerating, the engine nearly stalled.It turned out that my catalytic converter was disintegrating, and choking off the exhaust so severely that the backpressure was causing engine retardation. I took the vehicle to a muffler shop, where they performed a backpressure test on the exhaust to diagnose the problem. After replacing the catalytic converter, the problem was corrected.
Check your spark plugs and leads.
it could be your timing is off
bad/partially blocked catalytic converter. - kind of a rotton egg smell, right?
my first guess would be that it is your catalytic converter is plugged. Also,check the oxygen sensor. Also, the IAC (idle air control) may be at fault.
Vaccuum leak somewhere
A bad exhaust will cause gas fumes to get inside the Nissan Maxima while it is idling. Gas fumes, if contained in an enclosed space, is dangerous.
Depends on which of the readings failed. Was it CO (carbon monoxide), HC (hydrocarbons), NOx (nitrous of oxides), or a combination of them?
Where is the smoke coming from? If it's the engine you may have bad valve covers or something is burning up from under the hood. Check the source and check it fast. If it comes from the tailpipe you may have a catalytic converter problem.
Leaking fuel injectors. Catalytic converter... i had same problem. smells like rotton eggs right?
I'd like to know too! Mine does the same thing - it makes a rattling noise upon startup that goes away after 30 seconds or so and isn't present while driving or idling.
Bad catalytic convertor. Egg smell is a dead giveaway.
Idling too low or a bad lock-up torque converter solenoid.
Bad lockup clutch in the torque converter possibly.
I have a 2000 Mazda 626 with the same problem and the mechanic is dumbfounded. My best guess after ruling out any fuel problems is the catalytic converter. Does the stalling/cutting out get worse if the A/C is on? Does it get better for a while after the car has been sitting cold?
Yes, ideling your engine for extended periods of time is not recommended, due to the fact that carbon deposits can build up on the head of the pistons and CFC's (unburned gases) emitted out the tail pipe are more concentrated and harmful to the environment. Engine idling does have a couple of effects on the engine, the most severe is to the connecting rod bearings. Because of the relatively slow speed of the engine, more pressure is exerted on the bottom center and top center of the bearings. The faster the engine turns, the load gets spread out more evenly over the bearing surface. Prime vehicles for this kind of damage is police cars. Police cars spend an inordinate amount of time idling writing tickets, filling out reports and stake outs. I have replaced many a connecting rod bearing in police car engines because of this. The other effect is not so drastic. It is an idling engine may not get hot enough to start the catalytic convert working or hot enough to run efficiently. It may also load up the catalytic converter with fuel that could lead to an early demise of the catalytic converter.
i just payed $450 for mine and it has idling issues..searching for knock sensor location now...
There have been some cars manufactured to use this technique. When the engine is under little or no load (like when idling at a red light), some of the cylinders are turned off to use less fuel. Do not attempt to do this on an engine not designed in this manner. You will ruin the O2 sensors and the catalytic converter and the car will actually get less mileage.
My car (year 2000 S500) has the car shaking a bit and clicking or clanking sound when idling. Was told it is due to bad catalyst converter (the inside was broken). Are those the symtoms or there are other symtoms? Please advise. Thanks.
Check your catalytic converter. It sounds plugged and won't let the engine gases flow through the system. Quick way to check it is while it's idling, plug the tailpipe with your hand. If it's OK you should not be able to stop the exhaust flow. If you can stop it or there is not much flow, you probably have a plugged catalytic converter.