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Old 04-19-2010, 07:45 PM   #1
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Newbie with a few questions

Hello all,

I recently picked up an 02 Wrangler X with 75,000 miles from a local dealership. I have to say, of all the vehicles that I've owned, this is by far the most enjoyable. Anyway, to the questions.

-I have noticed that my temp gauge is floating alot around the 210 mark. One minute it could be at 215 and next at 205. While idling, it typically stays at 210 but when I start off, it will jump to 215 and then fall back to 205-210. I have noticed that there is a wider varience if I have the heat on. Also, it will typically remain at 215 while at highway speeds. I feel like that is alot of varience in temp. considering the behavior of most of my past vehicles. Also, everyone that I have talked to that owns a 4.0L says that the temp always stays pegged at 210. I have checked the coolant and it appears to be in very good condition. No oil in it. I also looked for bubbling in the coolant reserve... nothing. What are your thoughts on this? Possible water pump? Maybe a rad flush?

-I have also noticed that I'm getting a wobble at from 65+. It is not noticable through the steering wheel. It is felt through the floor. I know that one of the sway bar links was replaced by the dealership before I purchased it. I don't see any irregular wear on the tires. It has a stock suspension. Any suggestions on where to look for the cause?

-When I was driving the Jeep home from purchase, the check engine light came on. I grabbed an OBDII sensor and it pulled a code for the TPS. Where is the TPS located? Although the Jeep has a limited used car warranty, I'm pretty confident that the dealership will put up a fight about replacing it so I'm thinking that I will just do it myself.

Thank you for your time. Although I'm having some minor issues already, I can say that I'm happy that I bought it. What a blast to drive.

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Old 04-19-2010, 07:55 PM   #2
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Welcome to the forum

I don't know a lot about the issues you are having, but I have always gotten the impression that most of the gauges on Jeeps are more of a "suggestion" than carved in stone fact as to their reading. And really 205 to 215 is pretty much 210.
The wobble that you feel may be tires.
No clue about the TPS. Someone who knows will fill you in soon, I'm sure.

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Old 04-19-2010, 08:40 PM   #3
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TPS is the throttle position sensor on the side of your throttle body. Four bolts and you can remove your throttle body to clean it with some carb/throttle body cleaner. Check out the sensors too and clean them too. Did it on mine and it helped.

I want to say tire balance is needed but seems like you'd feel that in the steering wheel too.

Think you're going to hear from others that your temp is normal.
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Old 04-19-2010, 09:33 PM   #4
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1. temp is fine...the inline six has always ran at an average 210* for decades. It is actually designed to run there.

2. Highway speed "wobble"...most commonly always caused by poorly balanced tires. Have a KNOWLEDGABLE tire guy road force balance them. ////also not being "felt" through the steering wheel...Check the transmission/tcase mount...also common for them to seperate and can cause such a feeling.

3. TPS...easy fix...located on the throttle body on the drivers side of the engine. "what the air intake tube is clamped too." Pic for easy referance.....




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Old 04-20-2010, 09:08 PM   #5
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Thank you!
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