I have a 90 auto. The coolant sensor on the passenger head is a bit ruined and there is not a solid contact with the wiring attached to it.
Someone know the AC Delco or GM part#??
If someone knows also the part# of the connector ... :o
It seems simple to found it for models up to 89...not for a 90-91
Thanks in advance.
-Beppe-

 

Wells# TU66. (Autozone)$10
They are all pretty much the same (SBC)-You can cross reference that # if you are looking for the ACDelco one

Edit:This is the one between #6 and #8 cyls withthe spade connector, right?

 

I know that the 89 and earlier had the spade connector.
I can find these sensors (for 89 and earlier) not for 90-91 models.
My sensor (the one installed now in my car...and i don't know if it's the original of a 90) has a mushroom end.
I'm pretty sure that if I buy a 89-earlier sensor/connector it will be the same... but I'm afraid about the lower and max voltage used by the chip to translate the volts in °F.
Why 90 and 91 models haves always different parts....???
-Beppe-

 

Hmm, wonder if you have the fan switch (mushroom shaped connector) in that side. Hopefully someone with a 90 will pipe in.

 

I don't know if the sensor is a part of a cooling fan kit ...
...the only thing I know is that before reprogramming my chip with lower temp starting fans, the fans started at a stock (high) temp (both fans...)
-Beppe-

 

GM switched the location of those senders/switches on different years. On the 86, the one in the passenger side head is for the digital dash gauge, not the fan.

Someone else on the Forum is having a similar problem, trying to identify the sender/switch he was sold. He posted a photo of what he bought. Based on what you posted, I believe it's the same one you're looking to replace. BTW he also posted a photo of the box with the part number.

Check it out, may solve your problem. If I locate the post, I'll post the link.

Hope this helps.

Jake

 

Here's the link to the Forum page showing the photo of the sensor/sender I believe you described.

Let me know if it's the one you're talking about.

http://forums.corvetteforum.com/show...32&forum_id=48

Hope this helps.

Jake

 

Sensor was $14 from the dealer. Connector was $22. My 85 has the spade connector on the driver side and the one you describe on the passenger side. I bought mine from Autozone. The first one they brought out was the spade kind. He went back and pulled the other one and it was the right one. Paid about the same for it from Autozone as I the one from the dealer cost. I just replaced that connector on my 85 when I put the 383 in. The connector was more expensive then the switch.

 

The Model Year 90 has the stock dual fan set up, BOTH fans being controlled by the computer. I suspect he is talking about the analog temperature sending unit that provides a signal to the analog gauge located on the the dash.

This part should be available. Not sure if the LT1's have the same sending unit on the passenger side. The 90 and 91 should be the same.

Let us know.

Spent some time working out of Brindisi. Bonjarno.


dlmeyers 90 coupe zf6 3pseed shocks

 

Thank you Jake, the problem is that I cn't see the pics in this post ...
-Beppe-

 

I don't know....
I have 2 temp cooling sensors.
One is located under the throttle body (and someone in this forum said that this sensor is to measure the temp of the coolant and send this measurement to the gauge in the dash.)
Occasionally I had this sensor (the one under the TB) disconnected and I had a LOWER temp reading in the gauge (but not zero..just 50 or 60 °F less than the real temp).
The other sensor is the one on the pass side head (and someone in this forum said that this sensor is to measure the temp of the coolant and send this measurement to the computer to tell him if is the moment or not to activate the fan(s) )
No others temp sensors on my car...
the only one additional is the one under the plenum (intake air temperature) that seems equal (really equal !) to the one under the Throtle body described above as coolant sensor..
Can someone confirm that the function I explained are right??
-Beppe-

 

You have two temp sensors. 1 in the manifold under the throttle body, with a 2 wire plug, which I believe is for the dash gauge, I could be mistaken though. You also have one in the passenger side head. The hole in the drivers side head should be plugged, earlier models use this, but it was done away with and combined with the passenger side head in late 80's as I understand it. I asked this question a while back when putting my '90 back together and thats the answer I got. On the passenger side head there is a sensor under/around the #6 plug with a spade connector. I got mine from Advanced Auto Parts, and you can order from them online www.advanceautoparts.com since if I remember right you are out of the country. The sensor I got did not look exactly like the original, where the original spade faced downward and the replacement sticks straight out, but the plug from the wiring harness slipped right on none the less. Hope this helps you.

Also the one under the plenum for the air temp and the one in the front of the manifold are the same sensor. I had to buy a pigtail adapter for the one in the plenum though because the plug end didn't match the original wiring harness. I got this from www.oreillyauto.com , came with sensor and pigtail. I walked into the store and I know the guy behind the counter and told him my problem, he just chuckled, and got the sensor that came with the adapter, which he said gm made a change to the plugs sometime back then and when you buy the new air sensor, if you have the old plug, you have to get the one that comes with the adapter pigtail. Yes its more money for the one with the adapter of course.


Chris

 

Part # 10096136 at the ac delco web site - picture included so you might want to poke around there and make sure it matches up. Look under Electrical - Switches.

 

You should have rwo (2) water temp sensors. Ine in the fromt to the intake manifold base, pointing forward that feeds the ECM. The ECM uses that for a lot more than just operating the fans,. like cold start enrichment and cold idle speed. The other sensor in one of the heads is for the gauge. The hole in the other head should be plugged. In previous years that other hole was used for the aux fan temp switch. Unfortunately, my parts biik quits at 1989.

RACE ON!!!

 

The pic I'm talking about is farther down. Has the sensor and the box it came in show in "living color". LOL

Jake

 

I'm sure you are right. And sure I know that the coolant sensor (the one for fans) is used for all the tables and parameters on the chip coolant temp relates..bias..advance and ...).
But, what you are saying is just the opposite me and hz900 are supposing.
I have to try to see if I disconnect the cable from the sensor on the head, the temp on the gauge will fall or not. if I'll se a decrease on temp reading on the gauge you are right.
-Beppe-

 

-Beppe-

I could very well have the two backwards, I was going from memory, not the book, just so you know, CFI may indeed be correct

 

Do it. Then ground it while someone is watching the gauge. Head = gauge sending unit. Intake manifold = ECT (Engine Coolant Temperature) sensor for the ECM, for all ECM engine functions and the fans. Guaranteed.

RACE ON!!!