What is this sensor?
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Joined: Aug 2006
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From: Rugby, Warwickshire, England
, can always reply on someone helping you out quickly!It is the knock sensor I was referring to btw.
I had a hunch that was what it was, but my Haynes manual helpfully only mentions the location of the one on the right hand bank and then states there is another one but doesn't say where...
I noticed it was there as there was no wire attached to it so I had a hunt around and found the green/white wire hanging around off the harness. I guess having one disconnected doesn't trigger a CEL...
Thanks Again,
Pauly
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From: Rugby, Warwickshire, England
Thread Starter
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Joined: Aug 2006
Posts: 97
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From: Rugby, Warwickshire, England
Hmmm, seems it may be the auxiliary fan temp sender, rather than a knock sensor...
See:
http://forums.corvetteforum.com/c4-t...post1564648759
Wouldn't have made any difference being off, my car never gets hot enough to need it....
Pauly
See:
http://forums.corvetteforum.com/c4-t...post1564648759
Wouldn't have made any difference being off, my car never gets hot enough to need it....
Pauly
Instructor
Joined: Mar 2009
Posts: 126
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From: Newington CT
I dunno
It sure looks like a knock sensor to me.
I'm pretty sure some years of C4's have 2 knock sensors, someone needs to correct me if I'm wrong.
Actually...I'm gonna go look in AllData right now and find out [I]exactly[I] what that is.
It sure looks like a knock sensor to me.
I'm pretty sure some years of C4's have 2 knock sensors, someone needs to correct me if I'm wrong.
Actually...I'm gonna go look in AllData right now and find out [I]exactly[I] what that is.
Le Mans Master
Joined: Sep 2006
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From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
that is the aux fan switch. it comes on with temp.
the knock sensor is in the block drain fitting just within an inch or so of the oil pan. and it is on the right side by the starter.
the knock sensor is in the block drain fitting just within an inch or so of the oil pan. and it is on the right side by the starter.
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Le Mans Master
Joined: Oct 1999
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yeah that looks like a fan sensor, being it is in the head.
rather it turns the fan on and off, or sends the info to the dash. I cant remember which is which and what years have what.
The knock sensor is usually in the block, on the passenger side.
rather it turns the fan on and off, or sends the info to the dash. I cant remember which is which and what years have what.
The knock sensor is usually in the block, on the passenger side.
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From: Rugby, Warwickshire, England
Thanks again,
Though doubt it being plugged/unplugged will ever make much difference here! Temp today in my town was 64 degrees, which qualifies as a nice summers day....
So like I said, No cooling issues on mine, primary fan runs as it should around 223 or wherever, and temp drops then, so it never gets hot enough to need aux in any case... I actually didn't know there was an aux fan until today... :o
Only time I can see it running is if a head gasket fails or something...
Pauly
Though doubt it being plugged/unplugged will ever make much difference here! Temp today in my town was 64 degrees, which qualifies as a nice summers day....
So like I said, No cooling issues on mine, primary fan runs as it should around 223 or wherever, and temp drops then, so it never gets hot enough to need aux in any case... I actually didn't know there was an aux fan until today... :o
Only time I can see it running is if a head gasket fails or something...
Pauly
Melting Slicks
Joined: Oct 2004
Posts: 2,510
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From: Austin Texas
Thanks again,
Though doubt it being plugged/unplugged will ever make much difference here! Temp today in my town was 64 degrees, which qualifies as a nice summers day....
So like I said, No cooling issues on mine, primary fan runs as it should around 223 or wherever, and temp drops then, so it never gets hot enough to need aux in any case... I actually didn't know there was an aux fan until today... :o
Only time I can see it running is if a head gasket fails or something...
Pauly
Though doubt it being plugged/unplugged will ever make much difference here! Temp today in my town was 64 degrees, which qualifies as a nice summers day....
So like I said, No cooling issues on mine, primary fan runs as it should around 223 or wherever, and temp drops then, so it never gets hot enough to need aux in any case... I actually didn't know there was an aux fan until today... :o
Only time I can see it running is if a head gasket fails or something...
Pauly
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From: Rugby, Warwickshire, England
Wikipedia: Royal Leamington Spa, Warwickshire
Seriously, I think the official record temperature EVER in the UK is around 102 degrees! Most summers we will have no days even in the 90s...
Why do you think we're all so pale looking!
Pauly