The camshaft position sensor and the crankshaft position sensor both help the pcm establish the rotational position and speed of the engine. The camshaft position sensor helps the pcm determine when to inject fuel to each cylinder and the ignition timing.
If there is no signal from either the Crank PS or the Cam PS it will shut down the ASD relay.
OK whats going on, I called 2 Auto Part Stores and both told me that my 98 Dodge Dakota with a 3.9L V6 SFI engine didn't have a Camshaft Position Sensor, but I took it out today and cleaned it just to see if it would make a difference, which it didn't. It sits under the Dist Cap with a 3 wire plug in.
Vehicle: 2001 PT cruiser limited, 98 intrepid rebuilding the engine
The crank shaft position sensor senses where the crank shaft position is. When you first turn on the key, the ASD relay come on for a couple seconds, if it doesn't then the problem is not the crank sensor or any other sensor.
Thanks dhvaughan for the info, I found it on Autozones website, but had another question.
The Pickup Coil "Camshaft Pos Sensor on the website said it was for a 1998 Dodge Truck Dakota 2WD 3.9L MFI 6cyl but when I ran the VIN to check what motor was in it it said 1998 Dodge Truck Dakota 2WD 3.9L SFI 6cyl.
So my question is, are there any difference in the MFI and the SFI or will the part still work?