Crank Sensor dies in 10 minutes

[milesengineer]

I have replaced my crank sensor three times now. Everytime I replace it the cars starts on the first try and runs perfectly fine. The next day I get in the car to start it and no spark. Tries to sputter a couple of times and then nothing.

Go to the store get the new sensor replace it and the car starts right up. Only thing I can think of is the heat from the engine is frying these autozone parts. Although I have fried one GM sensor. Confused.

Any suggestions??


Thanks

 

[qwic87gn]

Take the tension off the belt and see if you can move the balancer in and out. That could cause the same condition.

 

[Scott231]

There is also a good chance that your intrerupter ring has a ding/dent in it (rocks?). Eventually the dinged portion could be scraping off plastic from your sensor...to the point that it quits working. Compare a new one to the "broken" one you are removing.

 

[bruce]

Go to the store get the new sensor replace it and the car starts right up. Only thing I can think of is the heat from the engine is frying these autozone parts. Although I have fried one GM sensor.

I've never gotten anything but junk from autoslow as far as ignition parts, or O2 sensors go....

As mentioned make absolutely sure nothings been hitting them. It doesn't take much to kill one, just a scratch is the same as a human being hit with a baseball bat.

Then once you get one of the autoslows to last, get a delco, so you won't be replacing it again in a month or two.

 

[milesengineer]

I checked the balancer the last time I replaced it. Visually there were no bent blades, although two of the blades were rusty on both sides and one was smooth. I replaced the sensor and checked all blades with the old matchbook tip. All seemed fine and everything cleared. I pull the balancer off my other car and see if it makes a difference with the new sensor I get tomorrow.


Hopefully...


Thanks

Lee

 

[bruce]

I checked the balancer the last time I replaced it. Visually there were no bent blades, although two of the blades were rusty on both sides and one was smooth. I replaced the sensor and checked all blades with the old matchbook tip. All seemed fine and everything cleared. I pull the balancer off my other car and see if it makes a difference with the new sensor I get tomorrow.

What did the sensor look like?.
How much crankshaft end play do you have?.
While, IMO, the AS sensors are junk, for one only to last 10 mins is a record for even them.

 

[milesengineer]

The sensor looked ok. The first one I pulled off was a little scratched up on one of the eyes. So I adjusted the GM one that I put on perfectly, it did not have any damage on it when I took it off. The next one I put on was GP sorenson and it looked perfect when I pulled it off. I will let you know how this one looks here in a little while.

As far as end play goes, I have not checked it with a gauge but I can tell you I have tried to move it by hand and it was tight and didnt feel like it moved at all.

Now everytime that I have had a no spark issue it was resolved when I replaced the crank sensor. I plan on checking all the wires and the plug leading to the sensor because I really cant see why this thing is chewing up all these things.

Thanks for the help

 

[Jerryl]

Dumb question(s):
Is it possible for the sensor to see too high voltage and frying it?
Not sure what voltage it it supposed to see. Charging system issue?

 

[milesengineer]

You my friend may be onto something. I was thinking about this the last couple of hours and everytime that I have had this problem I have been using a battery charger because my battery is dead. It has an aftermarket alarm on it that is drawing down the battery. Although I am using a slow charge at about 20 amps I might be frying the sensor.
I am going to charge the battery and then try the new sensor.


Thanks

Lee