How to install crankshaft sensor for my 98 monte carlo

Sounds like you need new crankshaft position sensor.

Behind the lowest pulley on the engine. This is the crankshaft. Remove the belt. Remove the tire on the passenger side along with the plastic coverings for the engine. Remove the bolt holding the pulley Use a pulley puller to pull the crankshaft pulley off. Remove the sensor on the right side if the of the shaft.

The crankshaft position sensor is a two pin sensor made up of plastic like material. It is located on the back side of the engine block about half way between the oil pan and the top of the block. It can only be accessed by crawling under the car.

Check this diagrams for each engine size...

1998 Chevrolet Monte Carlo 3.1 liter V-6 VIN "M"




1998 Chevrolet Monte Carlo 3.8 liter V-6 VIN "K"




Hope this helps, and remember ask for additional details.

No gaurantees, but it most likely needs a crankshaft sensor. That sensor triggers both the spark and the fuel injectors.

3.8L Engine

1. Turn OFF the ignition.
   
2. Remove the serpentine belts from the crankshaft pulley.
   
3. Raise the vehicle.
   
4. Remove the right front wheel and tire assembly.
   
5. Remove the right inner fender access cover.
   
6. Hold the flywheel with a (J 37096) flywheel holding tool.
   
7. Using 28 mm socket, remove the crankshaft harmonic balancer retaining bolt.
   
8. Remove the crankshaft harmonic balancer, using a (J 38197-A) balancer remover.
   
9. Remove the crankshaft position sensor shield (1). Do not use a pry bar.
   
10. Disconnect the sensor electrical connector.
    
11. Remove the attaching bolts from the crankshaft position sensor.
    
12. Remove the crankshaft position sensor from the block face.
    

To install:

1. Position the crankshaft position (CKP) sensor to the block.
   
2. Install the bolts to hold the CKP sensor to the block face. Tighten the bolts to 14-28 ft. lbs. (20-40 Nm).
   
3. Reinstall the crankshaft position sensor shield.
   
4. Connect the CKP sensor electrical connector.
   
5. Position the crankshaft harmonic balancer on the crankshaft.
   
6. Hold the flywheel with a (J 37096) flywheel holding tool.
   
7. Using a (J 36660-A) torque/angle meter, tighten the harmonic balancer bolt to 110 ft. lbs. (150 Nm), plus an additional 76 degrees.
   
8. Install the right inner fender access cover.
   
9. Install the right front wheel and tire assembly.
   
10. Tighten the wheel nuts to 104 ft. lbs. (140 Nm.).
    
11. Lower the vehicle.
    
12. Reinstall the serpentine belts.
    

It looks like this:

start by check ignition module(controls spark) do fuel pressure check to see if pressure within specs

Well both of you should look at the MAF sensor. It reads the air volume of the itake and adjusts the fuel accordingly. No air, No fuel, See if that helps

crankshaft sensor is located just above the crankshafy front dampener./ pulley

7X Crankshaft Position (CKP) Sensor
Lower rear of engine
4
25
--
24X Crankshaft Position (CKP) Sensor
Right hand side of engine, at end of crankshaft, behind harmonic balancer
7X Crankshaft Position (CKP) Sensor
Lower rear of engine
4
25
--
24X Crankshaft Position (CKP) Sensor
Right hand side of engine, at end of crankshaft, behind harmonic balancer
Right hand side of engine, at end of crankshaft, behind harmonic balancer