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Re: amber OBD light came on
Check the catalytic converter, sounds as if the cat converter is breaking down and the little pieces are banging around in the shell. has the fuel mileage suffered at all? has it lost power? if so then yes i'd say it was the cat
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The ringing noise could be from a bad alternator, a loose bolt, a loose pulley or gear or possibly a low fluid level in the power steering pump. Try listening for the noise when the engine is idling, then as you rev the motor from 1000 to 1800rpm and also while you are driving on the street and the highway. While the car is in park and running, crank the steering wheel right and/or left until it stops and hold it there to listen for noises from the power steering. The electronic gurgling noise and chattering noises could be failing bearings in one of the pulleys (tensioner, idler,etc. and/or possibly a water pump bearing. Here is a tip for diagnosis-
Find 3/8 drive extension that is at least 12" to 18" long. Open the hood and start the car. Take one end of the extension and place it on the alternator body away from any electrical connections, pulleys, belts, etc. and put your ear against the other end and listen for chattering, ringing or any other odd noise. Then do the same to the p/s pump, a/c compressor, etc. BE SURE YOU SAFELY APPLY THIS TECHNIC AND IF YOU DON'T FEEL COMFORTABLE, TAKE IT TO A PROFESSIONAL. SAFETY FIRST.
My advise is to adjust the rear brakes. The drum should not move in a side to side fashion. adjusting the brakes will also more than likely take care of that anti lock brake light also. adjust the brakes up to where the rear wheel will spin but you should be able to hear the brake show dragging slightly on the drum.
never had that problem with my GS400 but on my 95 maxima, i used to have that same high pitch squealing noise... i used some belt dressing that i got from R & S Strauss for a few dollars and sprayed it on my belts and pulleys that ran around the alternator, compressor, etc. and never heard the noise again. hope your problem is as simple and cheap to fix as mine was
You check the universal joints? I have had em make weird noises. The best way is to remove the driveshaft and inspect by hand they should rock back and forth without binding up at all. The bolts that hold that driveshaft in are usually locked in with locktite thread fastner. You will need a 12 mm box wrench and alot of muscle to get em loose or if you got some heat you can heat the bolts up some just dont get the heat on the pinion seal. You also might check the fluid in the transmission most of them take plain old dextron atf I would use a synthetic if your gone to drain and refill. Most clutch noise I have heard is either weak springs on the disk, or a faulty throwout bearing.