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what does the knock sensor do?

posted by  89740GL on  Mon Jul 31 16:12 CST 2006
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last visit: Mon Apr 9 17:50 CST 2007
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hey
this might be a dumb question but what does the knock sensor do? would a poor idle show that its bad? my idle is poor especially when the engine is cold, once it warms up it gets better but its still a little rough. besides a good tune up (which i have done) what sensors should i look into.
i dont think its the TPS because i have replaced it.

thanks in advance
-sal








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what does the knock sensor do?

posted by  89740GL on  Mon Jul 31 16:14 CST 2006
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last visit: Mon Apr 9 17:50 CST 2007
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by the way i should have said this before: its an 89 740 GL with a B230F 2.3L engine.
thanks again
-sal








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what does the knock sensor do?

posted by  89740GL on  Mon Jul 31 16:35 CST 2006
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last visit: Mon Apr 9 17:50 CST 2007
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just another thought after reading the FAQs more:
if i start up the car let it run and unplug the knock sensor nothing happens (idle stays the same) that must mean the knock sensor is bad right?







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