It has 206435 miles, I've had it 3 years, when I bought it had 179000+.
Since I've had it its been maintained fairly well, but before I have no idea.

I'm not necessarily trying to gain power, here lately my car has been smoking if I go in a store and leave it running.
When it sits idling, and I go to back up, it shoots out a puff of white smoke.
I was just wondering if my converter might be clogged.

What would be some of the symptoms of a clogged catalytic converter?

Thanks I will perform the repairs in a few days and give a detailed description

95 850 GLT, just recently my dash light stops working behind my clock and on the right half of my speedometer.
Is this a bulb, fuse, or a loose wire issue?

I live in a county that doesn't do any type of emissions, I am wondering if the things I hear about removing the catalytic converter and gaining power are true.
If so, how significant would it be and would if negatively affect my performance.
I have a 95 850 GLT with 206k, completely stock.

I just want to say thanks, the 93 octane did the trick!
I will bite the bullet and only run it from now on.

As I drive the car the sound seems to be triggered by the rpms. When I'm going up a steep slope the sound will begin, "rattling" as I hear it, I can limit how long the noise lasts by adjusting the pressure I apply to the accelerator, less pressure or more pressure and it goes away dependin...

Hmmm, I never thought about the injectors, a few friends have heard it and they said it sounded like valves. When I cleaned the PCV system I broke one of the fuel lines, I replaced it with a similar fuel grade hose. Were the factory part had a natural curve, after about four months, mine developed a...

Well the timing is good, I'm not sure about the can of marbles, I will have to grab some of my sons marbles and compare the sounds.

The only lights that are lit on my dash are service and abs. How would I determine it it is the sensor, or would the check engine light not being on rule it out?