Sending unit on Drivers side head???
Thread Starter
Le Mans Master
Joined: May 2002
Posts: 5,446
Likes: 1
From: 10.70 @ 124mph, Stock Bottom End @ 3620lbs, ECS Racing Team Member. The 1st NMCA LSX Index Rumble World Champion. 2011,12,13 Champion
Sending unit on Drivers side head???
I noticed today that the wire was off the sending unit on the head btwn 1 and 3 plugs. Can anyone advise what this is for? I am thinking it is a water jacket. I am only guessing. I did look in my Haynes manual and did not see this listed anywhere. The car ran fine till I saw it, But it could have just came off while I parking in the drive way.
The service engine light did not come on so that is why I may think it just fell off when I parked. The plastic that secures it on the sending unit is so brittle. I was touching the plastic and it was just crumbling.
I put some RTV Black on it to see if it will keep it secure to the sending unit. I am going to let it dry over night before I drive it. I started the engine after placing it back on and it ran do different then before I noticed it off. Thanks in advance.
The service engine light did not come on so that is why I may think it just fell off when I parked. The plastic that secures it on the sending unit is so brittle. I was touching the plastic and it was just crumbling.
I put some RTV Black on it to see if it will keep it secure to the sending unit. I am going to let it dry over night before I drive it. I started the engine after placing it back on and it ran do different then before I noticed it off. Thanks in advance.
Pro
Joined: Oct 2000
Posts: 564
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From: Riverview Florida
Re: Sending unit on Drivers side head??? (89NYFINESTVETTE)
Aux fan sender. Controls the fan that is in front of the radiator. If everything in your system is stock, this fan comes on only above 228*
Le Mans Master
Joined: Jul 2001
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From: Silicon Valley Kalifornia
Re: Sending unit on Drivers side head??? (Sharky Guam)
I always thought the sensor on the drivers side was for the ECM to read water temp and that the one on the other head was for actuating the fan ( in addition to the ECM fan control). :confused:
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Re: Sending unit on Drivers side head??? (89NYFINESTVETTE)
Turn the ignition key On and jumper that wire to ground; you should hear your aux fan (in front of the radiator) come On.
My connector was also brittle but I received a new connector with the low temp aux fan sw that I purchased.
My connector was also brittle but I received a new connector with the low temp aux fan sw that I purchased.
Le Mans Master
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Re: Sending unit on Drivers side head??? (GRX)
I always thought the sensor on the drivers side was for the ECM to read water temp and that the one on the other head was for actuating the fan ( in addition to the ECM fan control). :confused:
Thread Starter
Le Mans Master
Joined: May 2002
Posts: 5,446
Likes: 1
From: 10.70 @ 124mph, Stock Bottom End @ 3620lbs, ECS Racing Team Member. The 1st NMCA LSX Index Rumble World Champion. 2011,12,13 Champion
Re: Sending unit on Drivers side head??? (89NYFINESTVETTE)
Thanks everybody for the info, I guess it is safe to say that it is the aux. fan switch. I was hoping it may the reason my engine runs really rough and surging. I know the fans work because I have a aftermarket switch installed for the track and when I am in traffic. Thanks agin to everyone for the help. 
:cheers:
:cheers:
