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Old 06-27-2018, 11:10 PM   #21
jollymoon
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS

really running badly now
superior miss/stumble
like the right front wheel is locked up??
will try tomorrow with the ects two wire disconnected and see what happens...

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Old 06-27-2018, 11:14 PM   #22
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS

sorry double post

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Old 06-28-2018, 11:52 AM   #23
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS

Both sensors have 2 prongs but the "stop tabs" are different.
2-wire sensor
https://www.rockauto.com/info/903/1H9_3__ra_p.jpg
1-wire sender:
https://www.rockauto.com/info/903/1K2_2__ra_p.jpg

2-wire should be in the bottom hole, 1-wire in the top hole. The connectors can fairly easily be swapped around if you don't know better but they won't function the same.

Mixing these up means the PCM never reads the correct temperature which can mask other issue's as the PCM may never see that the engine is up to temp and so never go into 'closed loop' to run/test the rest of the systems.

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Old 06-28-2018, 09:25 PM   #24
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS

wow, not sure what to do
what do you mean the "top" hole and the "bottom" hole?
the two wire connector is plugged into the ECTS
carefully, making sure the little pins go into the connector correctly
the one wire is plugged into the temp gauge sender...

now the car won't run... superior miss/stumble and the right front tire is locked up...

disconnect the two wire ECTS connector
car runs , not great, but no stumble/miss/weird front tire lock up...

try again tomorrow with the ECTS connecter UNPLUGGED and see how the car runs

thanks for the help... about to get this 1993 SL1 running...

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Old 06-28-2018, 10:43 PM   #25
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS


1-wire sender in the top hole....2-wire sensor in the bottom hole.

The PCM has no idea the 1-wire sender is even there, it's got a direct uninterrupted path to the temp gauge.

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Old 06-29-2018, 10:17 PM   #26
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS

fetchitfido WOW !!
awesome picture
but my connections are hooked up exactly OPPOSITE...??? !! and linchpin has them hooked up the other way...
different models? what model is your pic for?
mine is a 1993 SL1 vin9 SOHC
https://www.youtube.com/watch?v=mNZq6PuOi5c
all he says is "Saturn s-series "

but the other situation/problem/connected issue (ha, pun intended!) has reared its ugly head:

[now the car won't run, won't even go forward ... superior miss/stumble and the right front tire is locked up... ] with ECTS unplugged or plugged in... with the 2 wire connector

I can start another thread if I need to...

thanks for your help!!

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Old 07-01-2018, 07:07 AM   #27
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS

Quote:
Originally Posted by jollymoon View Post
fetchitfido WOW !!
awesome picture
but my connections are hooked up exactly OPPOSITE...??? !! and linchpin has them hooked up the other way...
different models? what model is your pic for?
mine is a 1993 SL1 vin9 SOHC
https://www.youtube.com/watch?v=mNZq6PuOi5c
all he says is "Saturn s-series "

but the other situation/problem/connected issue (ha, pun intended!) has reared its ugly head:

[now the car won't run, won't even go forward ... superior miss/stumble and the right front tire is locked up... ] with ECTS unplugged or plugged in... with the 2 wire connector

I can start another thread if I need to...

thanks for your help!!
That photo is my '95 SL1 as it was delivered from the factory, and I can confirm nobody had swapped anything. It sounds like you either have sensors that have been swapped, or they were plugged in to the wrong sensor and probably damaged the sensor or connector.

With the wheel locked up, I think I'd just start another thread if I was you. But the sensor issue could likely be straightened out with new connectors and sensors, which is fairly cheap and easy.

For the wheel, probably brakes. But if it can spin and just doesn't, maybe a broken half shaft.

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Old 07-06-2018, 05:00 PM   #28
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS

huge question:
is the temperature sensor and the ECTS the SAME sensor???

I may have put an ECTS into the temperature sensor spot ... ?

when I took out the temperature sensor (thinking it was the ECTS) I compared it to the ECTS I bought and they looked the same...

should never have crossed my wires

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Old 07-06-2018, 11:42 PM   #29
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS

They are different sensors.

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Old 07-07-2018, 03:41 PM   #30
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS

well, don't know
two different answers
these two posts say the two sensors are the same
http://www.saturnfans.com/forums/showthread.php?t=97610
http://www.saturnfans.com/forums/showthread.php?t=98211

or did you mean same PART but different sensor locations?

Last edited by jollymoon; 07-07-2018 at 03:42 PM.. Reason: update

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Old 07-08-2018, 10:52 PM   #31
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS

For what it is worth the dealer here sold them as different parts.

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Old 07-09-2018, 03:14 PM   #32
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS

Yes, they're different parts. Coolant temperature sensor and gauge sender.

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Old 07-10-2018, 11:51 AM   #33
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS

Quote:
Originally Posted by jollymoon View Post
well, don't know
two different answers
these two posts say the two sensors are the same
or did you mean same PART but different sensor locations?
go to post 14 in the link in post 20 of this thread; there is a pic showing the difference in the connector ends

It's the only real way of telling the difference

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Old 07-16-2018, 08:50 PM   #34
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Default Re: A new twist on an old favorite: Hesitation AFTER replacing ECTS

Quote:
Originally Posted by StarLady View Post
The sensor Part #21020124 that you're using is the sensor that sends temperature info to temperature gauge. It should be connected to the one-wire connector.
The ECTS (Engine Coolant Temperature Sensor) is Part #21025106, and it's the sensor that should be connected to the two-wire connector.
gonna buy both sensors tomorrow, check the plug ends

http://www.saturnfans.com/photos/sho...ectors/cat/500

and hope I get this right this time

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