YJ runs hot/fuel gauge no workie - Page 3 - JeepForum.com
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post #31 of 34 Old 04-06-2010, 09:55 PM
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1993 YJ Wrangler 
Join Date: Mar 2010
Location: Arizona
Posts: 71
Originally Posted by TheDustMan View Post
1) Sounds like your radiator isn't getting enough air flow. You may try to take an air compressor and blow through from behind it, in the engine compartment.

2) It's a common problem, seems like every YJ has it. My old one stopped at 1/4 tank. I've heard that people have been able to fix it by cleaning the terminals on the tank, and also cleaning the terminals on the back of the gauge.

3) Sounds normal to me. In fact, that's pretty good. When the engine heats up, the oil loses viscosity (becomes less "thick") and it moves much easier, leading to lower engine oil pressure. My old YJ used to maintain about 25 PSI at idle when it was fully warmed up!
I replaced the radiator today with a new aluminum. Apparently the old one was not getting enough flow to cool the engine at sustained high speeds. Now the engine stays at a consistent 210 degree (half way on the guage) under all driving conditions. One problem solved.

I ran out of gas today (on purpose) to see if the fuel guage would ever move south of half, it didn't. So, I guess the next step is to start tearing apart the guage cluster and drop the tank. Any other suggestions are welcome.

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post #32 of 34 Old 03-10-2013, 09:29 PM
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1988 YJ Wrangler 
Join Date: Mar 2013
Location: columbia fall
Posts: 2
How many of you who have hot engines still have egr? Just wondering for my own knowlage.
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post #33 of 34 Old 03-10-2013, 09:34 PM
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1989 YJ Wrangler 
Join Date: Nov 2010
Location: Sin City
Posts: 2,881
The EGR valve operates on deceleration. My 2.5L is stock and passes smog. Runs great but the engine temps never get much above 210.

89YJ 2.5L TBI, AX-5, NP231 SYE, Ford 8.8, Yukon Grizzly, Tom Woods Shaft, 33" BFG T/As, 4" lift, Warn VR10000s.

AF Jeep Club Tail #184
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post #34 of 34 Old 03-10-2013, 09:35 PM
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1988 YJ Wrangler 
Join Date: Mar 2013
Location: columbia fall
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Oh wow!! this thread is 3 years old
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