Sorry for the long title but i wanted to make it clear what was wrong for everyone. This started yesterday 1996 850 turbo 155000

11am - failed attempt to start car, turned over but would not catch. Dipstick was bone dry - added oil, maybe a lil too much.

12pm - car running fine noticed smoke from tail, figured it was excess oil burning off.

2pm - car starts and runs fine.

5pm - same as above

9pm - same as above

11pm - car starts but revs itself up to about 4000 then drops down to normal. It returns to 4000 until i put it into gear. The car then feels like its got a mind of its own. It's pulling me along at about 55mph.

I cut it off at a light to see if it will stop. Car does not restart for about 2 mins. After restart it goes back to KITT Mode and takes off. If i toss it into neutral it jumps back up to 4000. since its late i make it home with no lights impeding my progress.

10am- I search a few volvo sites for a similar problem and deduce its probably the pedal position sensor. I restart car and it jumps up high again. This time to 2000 and slowly starts to make its way up.

10:30am - I turn it off and remove and scrub the sensor.
I notice the cylinder right above the TB is vibrating. is that normal?

10:45 - I attempt to restart the car several times. It will turn over but not catch. I cant pull codes yet being that i have no way to autozone to get a scanner. I will try tonight.

Please help