Give your VIN to a GM parts and service center and they should be able to supply a replacement
Ebay has several most of the time, search 91 Regal
If they are the exact same engine (3800 tuned port injection) then yes.
Is this an automatic transmission?
front wheel drive
how to remove crankshaft position sensor from 91 Buick Regal
3.8 liter V-6 : .060"
no, it's fuel injected all controled by engine computer
if u follow the hose from the raadiator to the the motor u should find it
On my 91 its along the drivers side of the car where the fuel line runs back to the gas tank
On the right side of the steering wheel. Push it up to activate, down to turn off.
It is mounted on the throttle shaft usually on the other side from the throttle cables. It has a three wire connector plugged into it.
no not if they are tight