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Unread 08-23-2008, 02:18 PM   #16
fgcox1
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1993 YJ Wrangler 
 
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Youse guys are all genius'es!!!!

It is on the drivers rear (ouch!) and was broken off, looking just like a bolt head. Muddy93, you de man!

Unscrewed and replaced, it works great.

I do think it is interesting that the 93 YH FSM is wrong. I wonder how many folks have been led astray?

Anyway, I owe each of you a cervesa of your choice if you are ever in Dallas!
Tnx Fred

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Unread 09-07-2008, 09:35 PM   #17
quadrider21
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92 2.5L swaped with 2000 2.5L

I swaped my 92 2.5L engine because the temp senor was broken off

Any ways, the 2000 2.5L doesn't have the same sensor in the head that my 92 did. Any one have a good idea on how I can get a good temp reading with out drilling and tapping the head?
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Unread 09-07-2008, 11:17 PM   #18
BackRoadJPin
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Quote:
Originally Posted by quadrider21 View Post
I swaped my 92 2.5L engine because the temp senor was broken off

Any ways, the 2000 2.5L doesn't have the same sensor in the head that my 92 did. Any one have a good idea on how I can get a good temp reading with out drilling and tapping the head?
if this motor is out of a 2000 Wrangler then it is not a 2.5L I believe it to be a 2.4L and is a whole different motor.
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Unread 06-04-2009, 08:33 PM   #19
khurley
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Quote:
Originally Posted by quadrider21 View Post
I swaped my 92 2.5L engine because the temp senor was broken off

Any ways, the 2000 2.5L doesn't have the same sensor in the head that my 92 did. Any one have a good idea on how I can get a good temp reading with out drilling and tapping the head?
I have a 96 cherokee, 4.0 inline 6 cyl. I recently installed a reman, and the whole for the temp guage sending unit is not there. My question is the same, any ideas what I can do to get a reading to my temp guage?
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Unread 06-04-2009, 08:58 PM   #20
bartolo
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if u unplug the sensor temp for the computer will the jeep stall i was mudding and my temp sensor for the computer broke and it was just hanging my jeep 91 yj 4.0 ho stall on me after looking around i found this put it back in place and a few minutes later it start would that be the probem i had?
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Unread 06-04-2009, 09:20 PM   #21
Louie4
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Quote:
Originally Posted by bartolo View Post
if u unplug the sensor temp for the computer will the jeep stall i was mudding and my temp sensor for the computer broke and it was just hanging my jeep 91 yj 4.0 ho stall on me after looking around i found this put it back in place and a few minutes later it start would that be the probem i had?
Possibly. I've had mine unplugged and nothing ever came of it, but I was playing with an XJ one time and I unplugged it and the electric fan came on and would stay on. If the computer can't sense how much fuel to put in the engine it might cause it to have hard starts or not run as efficiently. If you broke it though you should replace it. Its only 14 bucks at autozone. I can't remember how much the coolant temp sender is, I replaced that years ago after I broke it when doing a valve job.
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Unread 06-05-2009, 09:58 AM   #22
khurley
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I have a 96 cherokee, 4.0 inline 6 cyl. I recently installed a reman, and the hole for the temp guage sending unit is not there. My question is the same, any ideas what I can do to get a reading to my temp guage?
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Unread 01-08-2011, 08:03 AM   #23
brentd711
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Can someone post a pic of the ECM CTS on a 1990 4-banger?
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Unread 01-12-2011, 08:51 PM   #24
carlitos_90
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i have 93 94 and 95 2.5L ...and a 95 4.0 ... anything needed to check? on their be glad to help
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Unread 01-13-2011, 12:12 AM   #25
SpideYJeep
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Quote:
Originally Posted by timatoe View Post
That's oil pressure, engine coolant temp. is, driver side rear corner, next to the valve cover.

fgcox, the sensor may only appear to be a stud sticking up from the head.
Quote:
Originally Posted by fgcox1 View Post
It is on the drivers rear (ouch!) and was broken off, looking just like a bolt head. Muddy93, you de man!

Tnx Fred
No love for timatoe?
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Unread 01-13-2011, 06:06 AM   #26
Que89YJ
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Temp sensor

Here is a good post for function:
image064.jpg   image066.jpg  
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Unread 03-02-2011, 09:41 AM   #27
ckimbrough66
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i have the same wire loose. would that cause any problems? like my yj running very rough?
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Unread 03-02-2011, 10:29 AM   #28
Que89YJ
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Not from the temp sensor in the rear of the engine. It is strickly for the guage.
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Unread 03-02-2011, 12:26 PM   #29
Berniebikes
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Well, this thread is clear as mud. Too many engines, too many combinations/variations. I will add to the original description regarding temp sensors/switches for the 4.2 L carbed engine. this engine actually has 3 temp sensors. Two are located on the driver's side manifold.



Usually the two wire switch is in the forward location, the single wire switch is in the rear location, but on my engine they are reversed. Doesn't make any difference as they both will measure the coolant temp. The single wire switch is used for the intake manifold heater operation. The two wire switch is used for the operation of the closed loop system with the ECM and in conjunction with the Thermal Electric Switch in the air cleaner.

On the rear of the block next to the valve cover and by the firewall is the third coolant temp sensor which operates the gauge on a 4.2L engine. It has a single purple wire to it as shown here.



This applies pretty much to all stock 4.2L engines, though many folks have no need for the either of the two manifold mounted if they have nuttered their engines and removed or disabled their intake heaters. Hope this clarifies things some.

b
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Unread 09-15-2011, 09:42 AM   #30
87yjrad
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Thanks Bernie! That's exactly what I needed. I just did a Howell FI conversion and can't get my temp gauge working. That helps a lot because I saw three sensors but didn't know what each one did. I'll get it not. Cool.
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