XJ XJ8 / XJR ( X308 ) 1997 - 2003

knock sensor problem. is this common?

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Old 09-26-2013, 08:04 AM
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Question knock sensor problem. is this common?

i have the restricted performance reading coming up. after i drive about 5-10 miles the restricted performance reading goes away and i can drive with out my car being held back by a bad sensor.

but on top of that problem earlier this year i had a coolant leak that was under the supercharger. i had it fixed. long story short im still leaking coolant but now i cant trace the leak. its not dripping anywhere. my theory, i think I'm leaking toward the front of the block (still under the supercharger), coolants hitting the sensor making it go off but after my motor gets hot it dries the sensor making sensor function properly.

does this make sense to you all or am i just completely crazy and over thinking?
 
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Old 09-26-2013, 08:41 PM
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That is the exact scenario my tech described as causing the most failures of knock sensors, a leak gets them wet and they fail.
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Old 09-27-2013, 05:40 AM
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My mechanic told me the same thing -- they get wet and they fail. I replaced mine, not a big deal and not expensive.
 
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Old 09-27-2013, 02:00 PM
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Originally Posted by OldMike
I replaced mine, not a big deal and not expensive.

Unless you have a supercharger sitting on top of them, lol!
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Old 09-27-2013, 04:37 PM
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Yeah, sorry 'bout that! I wasn't thinking....
 
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Old 09-29-2013, 04:57 AM
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well at least it wasnt me thinking an over the top snow ball effect scenario. fortunately the people who done my work on my car warrantee all they do. even tho the last few times ive gone to them they messed stuff up along the way. which is sad because they are jag rover and mini specialists.
 
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