CAM SENSOR QUESTION?

[94V6ER]

Hey guys i just got an Auto Xray and ran the realtime monitoring of the sensors and the computer functions. I noticed that the camshaft sensor would become detected and undetected varying in the length of time. Ive been having a misfire problem and from reading the Haynes manual it a says that if the camshaft sensor doesnt get a reading then it will give a default code to fire the injectors. I can tell a difference when the scanner reads not detected but then a minute or two is goes to detected again.

I guess my real question is.... Does the computer need to get a (detected reading) constantly or should it modulate back and forth detected/not detected?

Thanks!!!
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[GordSipko]

The cam position sensor needs to work full time!

The cam sensor synchronizes the ECU with the intake cycle on cylinder #1. When the sensor is being flaky or doesn't work at all, the ECU falls back into 'guess' mode because it doesn't know precisely when to deliver the fuel. The engine will still run but rough engine operation is one of the results.

It sounds like your sensor or the wiring connecting it is intermittent and needs to be fixed!

[spunger]

Mine does the same thing. Any places to look for this sensor and or a way to test it? Please let me know. Mine is only at idle that I know of, but.....I will check it out.

Give me an idea on where this is?

Thanks,
Chris

[94V6ER]

It's right under the throttle body between the intake and front timing cover. It only takes a 8mm socket on a swivel to get to it. I took my intake elbow off to have a better shot at it. You'll see 2 wires coming out of it. Its about 4-5 inches lg and has a o-ring seal.

The problem with mine was a piece of debris. I removed it and it solved that problem. Now Im fighting 14 degrees of knock retard from the knock sensor. :mad: Gonna fix that to!

[strange_trp]

if cam sensor fails, pcm goes into batch-fire mode. loss of power as the fuel must remain in combustion chamber longer before combustion. you can test with scope or meter. scope is best so you can look at pattern, but scopes are f'ing expensive. i believe haynes describes a testing procedure. if not, email me and i'll post one.
you should test circuit to/from pcm as well as sensor itself. too many parts are replaced needlessly because the actual fault was a poor circuitry for that sensor.