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Old 02-06-2005, 01:17 AM   #1
Hola
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Default Camshaft Position Sensor (Car won't start)

Hi, I have a '93 Legacy 2.2L NA. The other morning I went out to start it and it wouldn't start. It had run fine the night before. The engine turns over and the spark plugs are getting spark and the fuel pump is delivering fuel. I then decided to check the car's computer and see if it was of any help. I connected the little diagnostic connectors under the dash and flashed the CEL. The trouble codes it gave me were for the #3 fuel injector and the camshaft position sensor. I don't think having one fuel injector out would prevent the car from starting, it would just make it run rough, right? After thinking about this I looked in my manual to see how to test the camshaft position sensor. It said to disconnect the harness from the sensor, hook a multimeter up to it and turn the engine over. The output from the sensor should be around 0.1 volts, varying in time with the engine turning. I did this and I got a reading of 0.2 and 0.3 volts varying back and forth as the engine turns. Occasionally the voltage would drop down to 0.1 for a moment but it stayed mostly at 0.2 and 0.3. My first thought was that the sensor must be okay because the reading was only one to two tenths of a volt off of what the specifications are. But then I got to thinking about it more and I realized that although thats only one to two tenths off normal, it is also two to three times what it should be. I guess what I'm getting at is is this a very sensitive sensor? Can a small difference in voltage cause trouble? I searched in old threads trying to find something out about this but was unsuccessful. Also, even though I'm getting spark does anybody think that there could be a problem with the coilpack/ignitor? For example, maybe it's giving spark, but not at the right time? If the car had died while running I would suspect the timing belt but since it just won't start I don't know what to think. Thanks for any help you folks can give me.
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Old 02-06-2005, 04:11 AM   #2
scottyP
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i had trouble starting my 2.2 because the cam postion sensor. it was a recall part for 95's though, maybe the 93's also, and it did fix the problem right away. you should find out from your local subaru dealer and its freee
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Old 02-06-2005, 04:05 PM   #3
FuJi K
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with the cam or crank sensor disconnected, the car will NOT start at all. I did a test on my MY99 for probable failers.
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Old 02-06-2005, 05:20 PM   #4
nunyo
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The cam position sensor and crank position sensor come in a set. From your dealer it'll cost you about $40. I just replaced them on my wifes EJ22 OBS.
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Old 02-07-2005, 02:46 AM   #5
HamFist
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Can you mess with the cam sensor and pick up any power? I wondered if it might be like turning a distributor....
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Old 02-07-2005, 09:45 PM   #6
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Quote:
Originally Posted by HamFist
Can you mess with the cam sensor and pick up any power? I wondered if it might be like turning a distributor....
No, the camshaft position sensor isn't turnable, it works by magnet or something. I actually ended up replacing it and the car still won't start so now I'm going to have to check the wiring and everything. Sometimes after I turn the key back to "ON" form "START" after turning the engine over there is a strange buzzing/grinding noise that comes from somewhere in the dash on the left side. I'm hoping that I haven't fried any wires. By the way, thanks everybody for your thoughts and ideas. I appreciate your time.

Last edited by Hola; 02-07-2005 at 09:46 PM. Reason: Forgot something
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Old 02-08-2005, 02:13 AM   #7
sick1.8t
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yeah both the cam and crank sensors sense the teeth on the pulleys going by and relay the signal to the ecu. they cant be moved or fooled with in any form.
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