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Re: Crank Position Sensor And You, Too! Posted by Ari [Email] (#2847) [Profile/Gallery] (more from Ari) on Fri, 6 Jan 2006 07:15:19 In Reply to: Crank Position Sensor And You, Too!, Pierre, Thu, 5 Jan 2006 16:23:18 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I haven't seen a rash of CPS failures - Personally, I've never had one.
The CPS is a purely electrical component - it has no moving parts. It is also not a current carrying component - it doesn't get heated up (self-heating) electrically, or carry current (like a relay, solenoid, or bulb). Yes, it lives in a high vibration and relatively warm area of the engine.
Non current carrying, non-self-heating electrical components, in general, have no predictable life. Components like that either fail withing a few hours of first being used ('infant mortality', in the business lingo), or they last pretty much forever. Failures that do occur are random. Therefore, replacing a non-failed one is a crapshoot - the one that was in there for 120K miles may very well last for another 120K miles; the new one may fail next week.
Components that get replaced are usually those with a predictable lifetime - like a pulley, where the bearings can be 'lifed' for so many millions of rotations, which can be roughly related to car miles.
In aerospace, there are almost no scheduled replacements for electronic components for this reason. So I wouldn't replace a CPS unless it fails.
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