2nd Generation Specific 1986-1992 Discussion

Id This Part: Near Oil Filler Neck

Old 01-18-2004, 01:39 AM
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its an S4 TII block, at the bottom of the oil filler neck, front side, ther is a bolt type sensor w/ a small wire coming out of it.



What is this sensor for? And what is it screwing into? I cant see up the hole very well, its too close to the block.



THanks



~Geoff
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Old 01-18-2004, 01:54 AM
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Knock sensoR?
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Old 01-18-2004, 02:39 AM
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coolant temp sensor for the gauge.
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Old 01-18-2004, 02:50 AM
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should be coolant temp sensor
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Old 01-18-2004, 02:51 AM
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pics
Attached Thumbnails Id This Part: Near Oil Filler Neck-car_003.jpg  
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Old 01-18-2004, 02:52 AM
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another of it alone:
Attached Thumbnails Id This Part: Near Oil Filler Neck-car_002.jpg  
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Old 01-18-2004, 03:01 AM
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Thats a knock sensor but I didnt this S4's had them...Is it even screwed into anything? Or plugged into anything?







Sorry. I was wrong. They do have knock sensors. Just looked it up in the FSM.

But anyways, yeah...Thats your knock sensor. Just a glorified microphone that pulls timing when it hears something that sounds like knock.
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Old 01-18-2004, 04:56 AM
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If i were to leave it out, should i plug the hole? or is it ok to leave it open?
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Old 01-18-2004, 11:59 AM
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Originally Posted by ioTus' date='Jan 18 2004, 05:56 AM
If i were to leave it out, should i plug the hole? or is it ok to leave it open?
The hole doesnt go anywhere. Its just a little place drilled and threaded in that iron. No need to plug it with anything.



However, Im not sure what ( if any ) difference the S4 cars make when they dont see a knock sensor. I think S5 cars retard timing 5 degrees...Could be wrong though.



Ive been Haltech powered for a while now so I dont know much about the stock ECU.
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Old 01-19-2004, 02:08 AM
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i'm runing a blowthrough carbeurator, so i have NO electronics whatsoever. So thats not a problem!!



THanks for all the help guys!!!
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