shumif1

Anyone ever change or know of a good after market exhaust that won't rot out in a few years. Especially the catalytic convertors up by the engine.

carguy07

OE never rots?

HadYurPhil

Mine is 12 years old with 220,000 miles and the original exhaust system is fine.

shumif1

thanks, im just thinkin of my vibration issue due to exhaust problems

Baetke

Please describe your vibration issue in more detail. I have been trying to isolate a vibration in my 99 AWD and have been heading in the direction of exhaust too.

shumif1

Baetke... i had a 99 rx with the same vibration. when at 750 RPMs i get a vibration and a humming noise like my bass was turned all the way up.

Baetke

Thanks shumif1,
I have a slightly different symptom. When in Drive or Neutral it idles at 700 rpm very smooth and quiet. If I put it into gear the rpms drop to 600 and I get a vibration that I can feel in the floor board. The odd thing is that I can balance a nickel on its edge on the engine cover and it won't fall over so I'm thinking the vibration is acoustic rather than mechanical.
Since you used past tense in your previous post does that mean you no longer have the car?
Baetke

shumif1

Baetke, i have a 2001 RX300 now but i had a 99 with the same symptoms. It only happens at 750 rpms, if the idle drops or raises it goes away. I am realy starting to think my exhaust is clogged somewhere but i think the 02 sensor would throw a code.

DMPesso

your problem definitely sounds like motors mounts not exhaust. if you never replaced them do it youll thank me later

DMPesso

your problem is also sounding like a motor mount issue if you never changed it thats 90% your issue and will make a world of a difference in the way the car drives

shumif1

DMPesso... i had a 99 RX300 with the same isues and changed all the motor mounts but had the same vibration. i did change the front mm on my 01 and the vacume module on it but still the same.

engine89

I had that bass and humming sound for a while in my 01 RX . Over the weekend the rear o2 sensor blew out of the pipe.The 2 nuts holding it must have rotted away. I replaced the nuts but while I was under there I also discovered a small leak by the bracket on the pipe just forward of the sensor. Did not fix that yet but humming went away. I would focus on that area for your noise.

DMPesso

Yea if not the mounts then definitely the o2s nothing else it could be.

shumif1

thanks for the info ,i'll check the o2s out