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Old 11-03-2011, 12:40 AM   #1
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Engine temp

Just bought a 95 yj and am doing some troubleshooting. My engine is running at 150 degrees all the time. The idle is low and a bit rough...going to change the plugs and wires, clean injectors. I discovered that my heater core is disconnected and the tubes have been connected to one another. Thoughts on what to do?

I am going to test the heater core with some water before reconnecting the tubes.

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Old 11-03-2011, 01:02 AM   #2
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My 95 YJ w/2.5L stays at 210 degrees.

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Old 11-03-2011, 11:04 AM   #3
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'91 YJ 4.0. 210 degrees dead on. Sounds like a thermostat is stuck open. Try changing it.
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Old 11-03-2011, 01:31 PM   #4
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sounds like heater core is leaking as to why it was bypassed and no thermostat why the temps are low. may even be an inaccurate temp gage.
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Old 11-03-2011, 02:44 PM   #5
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x2 for the above...
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2013 WRANGLER SPORT 2 DR., V-6 ,AUTO,HARD TOP
(Sold)1994 Jeep Wrangler 2.5L, Bestop top
/w steel half door and slider windows
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Old 11-04-2011, 10:46 AM   #6
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Temp

I just changed out the thermostat in my son's 95 YJ 2.5l. When I took the housing off, there wasn't an old thermostat in it. After I replaced it, it registered at the appropriate temp, but the check engine light came on. I think the PO took the old thermostat out to keep the check engine light from coming on. Gonna replace the coolant sensor and see if that makes a difference.
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Old 11-04-2011, 02:46 PM   #7
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Thermostat wont throw code on anything before 96. So its def not your problem. Why don't you just pull the code instead of wasting money?

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