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SOMEONE PLEASE HELP. Crank position sensor.

4.5K views 5 replies 3 participants last post by  Racabon  
#1 ·
7A-FE 1997 1.8 Corolla. Engine blew up, went to junkyard, all the corollas had their engines pulled, so I pulled one out of a 1994 Geo prizm. Everything hooked up perfect, exactly the same engine. Put it in, turn it over and no spark.
I remember that I forgot the crank shaft sensor.
I look back there behind the harmonic balancer and nothing…. I looked in front, i looked underneath, i looked everywhere. I cut the plastic open and zip tied the sensor in there just to test and still no spark, at this point I think I’m just going to make a bracket for it. Does anyone know the distance from the crank it needs to be?

I read somewhere that prizm’s might have the crank sensor on the distributor? Idek anymore. If anyone could help or tell me how stupid I am that would be amazing.
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#5 ·
Does the car need a crankshaft position sensor to get spark?


If you go to 2:57 in this video The guy doesn't have a crankshaft position sensor down there either.



at 3:05 in this video you can clearly see the mount for the crank shaft position sensor


"Both 7A-FE and 4A-FE have crank position sensor by the timing belt in years 96-97 when they switched to OBD2."


so the question now becomes, is there a magnet on the sprocket? is the magnet hitting the sensor once every single time around?
I looked it up and the sprocket says 1996-1997 so that means it does have a magnet in it. but when I go to the Toyota website it says the sprocket fits 1.6, 1.8 1994-1997.



So that would mean all of the sprockets are the same and it is just getting magnetized off the teeth on the sprocket.
I'd assume that it is a open and closed sensor. let's say magnetized is closed and not magnetized is open. I'll take my volt meter and read what the plug coming from the car says and if it is 12V then just put 12V to the sensor and see when it is closing and opening. meaning I could build a bracket and test when it is closing all the time (to close) or not closing at all (to far) I will update you guys when I try this out tonight.

Does the car need a crankshaft position sensor to get spark? should I start looking at different parts of the system? most cars can run without a CPS. I mean everything I took off is back together and the car ran before the motor exploded. idk