How to replace a crank sensor on a 93 buick regal 3.8L engine

You can fit anything with a cutting torch and a welder ,providing the block is the same then its just a question of swopping the older parts to your newer engine .If i was their with you having a tea and a ciggy i would soon advise but from afar -spain its is difficult

One of your door sensors (or trunk sensor) is signaling that it is open or the dimmer switch is turned all the way up, which turns on the dome and foot lamps. Try turning the dimmer switch all the way down. If this does not fix the problem you will have to get all the door sensors (and trunk sensor) tested to determine which one needs to be replaced.

check harmonic balancer

If your check engine light is on the computer in your car can give a code. Aamco will read your check engine light for free. Might need a repair manual to find out what code means (which o2 sensor). If check engine light is not on you will probably need to get each o2 sensor tested by a mechanic.

my name is David ,I live in Austin Texas and do alot of mecchanic / technician work around town. I do have my certifications and have work at dealerships and Autozone as well...with all that being said... if you are not getting spark on this vehicleand it is not likely the coils or the module. The crank position sensor the device responsible for reading the angle ( timing ) of the crankshaft. The crankshaft has notches in it that pass either through or near the crank position sensors magnetic tip. The ignition module then interprets the signal and allows signal ( electrical current) to pass into module and on to ignition coils...then on to spark plugs via spark plug wires/cables. The crank position sensor is located on the back side of the engine in the gap between the engine and transmission housing. it is held in place by one 8mm (metric size) or 5/16 standard size bolt. Use a wrench though unless you have small hands or a 1/4 drive socket set. 9.99 times out of ten it will start if there are no other issues... your welcome

no they are the same thing

The crankshaft position sensor is located on the right side of the engine block.
Typical DIS Crankshaft Sensor

harmonic balancer could be going bad. Rubber ages and can cause wobble and timing shift.

no the crank shaft sensor would not stop it from turning over

IF THE CRANK SENSOR GOES BAD ON THAT ENGINE THE CAR WILL STOP RUNNING OR NOT START IF TRYING TO START IT. NEED THE CODE INFO TO HELP YOU FURTHER. TRY GOING TO ADVANCED TO GET THEM TO READ THE CODE-THEY DO THIS FOR FREE.