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Does oil contamination effect the CPS 200 1991

posted by  dnordin on  Thu Jun 22 21:26 CST 2023
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1991 240 sedan auto, 2.4
I have had the car for several years and put quite a few miles on it. But I have gone through 3 Crank Position Sensors and seems like I need another. Based on the occasional hard start or no start, then I fiddle with CPS wire and it usually starts, That said I have not run diagnostics yet, but symptoms are the same. The check engine light is on. Its Buigicord sensor for what thats worth. The previous mystery brand did not last long.

So do you all think that oil contamination such as would occur with a rear main seal leak would cause the CPS to get a incorrect reading? Noting that a rear main leak will not be clean after a while, so the oil coating will contain a certain amount of magnetic material and other trash due to the slinging of the oil and the environment. The Plugs Cap, Rotor, Throttle Body, Flame Screen, Air filter all recently serviced.

I know there are lots of reasons why one would get an intermittent no start. But my previous CPS issues started just like this. And I do have a rear main seal leak, and probably a dirty oil separator.

Thanks,

Don
--
1991 240 Sedan auto






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