Looking for a temp sending unit
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From: Port Charlotte, FL
Looking for a temp sending unit I am looking for a temp sending unit that will work in my 1994 S10. It originally had the 3 wire temp sending unit in the old 4cyl...which is a dif thread than the LS1 has. But i have heard that a 1998 LS1 used the 3 wire setup. Does anyone know if this sender will work with the S10 3wire setup. I will still use the 1999 LS1 sending unit in the driver side head...for the LS1 ECM...but was thinking of using the 1998 one in the Pass side head to make the stock S10 gauge work. Thanks in advance for the info.
J-
J-
Im not sure if it would work?? But i would go ahead and give it a try. I mean it should work but maybe not give the correct reading.
Hey that connector for your S-10, does this look like this??
Hey that connector for your S-10, does this look like this??
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From: Downers Grove, IL
How big is the stock 4cyl sender? My stock sender was 3/8" pipe thread and I just cut it down and rethreaded it to fit in the passengerside head. It was easy to do and that way I knew the gauge would read correctly.
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i think it is also 3/8" pipe thread....but the problem is...i dont have any way to cut it down....and what thread pitch to cut it to. Also i dont know anyone who has metric tappered dies to thread it. all i know is people who have regular metric dies. So how would i get it to seal. But then again I would have to find somewhere to have it turned down.
J-
J-
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that is the part number for the correct temp unit that will thread into the LS1 but use the correct signal for my S10?? My s10 originally came with WELLS SU109 which is a variable voltage sensor....not a T type closed switch. And the 1998 LS1 used a SU112 which is also a variable voltage sensor. So in that case I was wondering if they could just be switched out and work fine. I just dont know if the 5v ref variable voltage sensors use dif voltage ranges or are they all the same.
Last edited by Jhankinson; Jun 5, 2006 at 12:10 PM.
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I was just about to ask the same question about the temp sensor on my 1994 S10! The passenger side hole is M12x1.5 on the LS1 and my sensor is a TSU81 (GP Sorsen) and only has one wire. I think its a 3/8 threaded sensor, not sure? I have been looking for an adapter but no luck. I've seen a few people drill out and re-thread the head, but I'm trying to stay away from that.
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From: Port Charlotte, FL
You have a 1994 S10 also. Mine has a 3 wire sending unit originally. and the 1999 LS1 uses a 2 wire setup. So you mean your 94 had just a one wire. Was it a 4.3l or a 2.2l originally. I wonder if that makes the difference. I can find the 1998 sensor for an LS1 which is a 3 wire setup, because it actually showed the temp...not a dummy gauge on the dash. I just dont know if it is the same resistance as mine from my S10 originally. LS1Perfomanceparts.com sells one they say will work....but I dont want to get involved with that company...as I havent had any or even heard any good times with them. So now I am just looking for the answers to buy one on my own 
My 94 S10 had the 4.3 with the one wire sensor. My 2000 LS1 has a 2 wire sensor. I just looked on Advance Auto Parts website and it shows the one wire sensor and your three wire sensor for a 1994 S10 2.2
http://www.partsamerica.com/ProductD...pe=290&ptset=A
I wonder if we could use the LS1 sensor if we ground one of the wires and use the other wire as the signal. Or if anyone knows of an adapter that will work. Im using a Current performance wiring harness and it has the orignal plug from the 4.3 coolant temp sensor. So I dont want to cut the plug off if I dont have too.
http://www.partsamerica.com/ProductD...pe=290&ptset=A
I wonder if we could use the LS1 sensor if we ground one of the wires and use the other wire as the signal. Or if anyone knows of an adapter that will work. Im using a Current performance wiring harness and it has the orignal plug from the 4.3 coolant temp sensor. So I dont want to cut the plug off if I dont have too.
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From: Port Charlotte, FL
Yeah my harness is the same way...I have the original LS1 temp sending unit on the drivers side head...and the original S10 3wire plug relocated to be at the passenger side rear...so I could try and find something to make the stock gauge work. So I am really hoping someone can help us out here. This would help out tremendously.
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From: Downers Grove, IL
I just used a standard metric die from sears to cut the threads on my sender and it has not leaked over the last 8500 miles. As far as cutting it down I was lucky, I was just getting ready to chuck it in the drill and cut it down with a file and my uncle stopped by and said WTF are you doing I have a lathe at work. So I gave it to him and he cut it on the lathe, but I think I could have probably cut it with the drill and file. Heres a pic of what it looked like when it was done. I just put a little teflon tape on it and a plastic oil pan drain plug gasket on it and put it in the head.
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From: Port Charlotte, FL
if i find a place that can turn this down and rethread it....could i use teflon tape and an O-ring to seal it up also....or do you think that the O-ring wont hold for long?
Granted I would rather find one that I could just replace it with....rather than turning it down.
Granted I would rather find one that I could just replace it with....rather than turning it down.
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From: Downers Grove, IL
I don`t know about using an o ring, I don`t think that you could tighten it up very well unless you had grooved the head and sender so that they would retain an o ring. I would either use a gasket for an oil pan drain plug (either the fiber or copper style) or an aluminum seal like they include with the equeous metric to american adapter kits.
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I have read into it...and all I can find is that for a 1994 s10 4cyl 3wire sending unit...and for a 1998 LS1 3wire sending unit....the wells manual calls for the same SU12 test procedure...so the unit works the same...i guess now it is does the ECM read the same. I wouldnt think that they would read the signal any differently...anyone know any info on this. It is driving me crazy trying to figure this out.
J-
J-
I was looking for a part number for a sending unit and came across this thread. You can not hook your stock mechanical guage to the factory ls1 sending unit. It makes the pcm read like -54 deg or something because it grounds it out. So turning the s-10 one down would probably be the best situation. Only one wire is needed to run the guage the others went to your s-10 pcm just like the ls1 sending unit does. As for the color of the wire andlocation I will have to look through my notes. When I do I will post it. Good luck
..RJ..
..RJ..
