LOST JEEPS :: View topic - Temp gauge - doesn't move after warmed up

tjkj2002 wrote:

Your temp gauge is just a fancy gadget,it only shows relitive readings.When the guage is centered your coolant temp can range from 178-225 degrees and the needle on the guage will not move.

I have a little gizmo that I plug in my OBDII port and it records all the info the PCM sees from the sensors and I can plug it into my laptop and gragh the info,the temp reading go in a stairstep fashion till the t-stat fully opens then it drops and starts all over agian.The t-stat in the KJ starts to open at 195 degrees and does not fully open til 218 degrees.

Care to tell where you got that and how much it was? Always wanted to hook my laptop up to my Jeep..

And idiot gauges is one reason I got my scan gauge.. Ive seen it as high as 230F in traffic and the gauge was still in the middle..

Author:	scoobysnax [ Tue Nov 18, 2008 11:29 pm ]
Post subject:	Temp gauge - doesn't move after warmed up
I’ve had my 2004 for about 18 months now and I’ve never seen the temp gauge move (after it’s warmed up.) It ALWAYS stays just to the left of the middle point. I’ve been in temps as low as -15 and as hot as 103 before factoring in the 90% humidity. That 103 temp trip had the AC on, 65 mph speeds and some hills as well as bumper to bumper traffic for 10 miles - yet no change at all!!! That’s not normal. I read posts about people having their transmissions overheat or their engine’s overheat (I would think they are related) and almost everyone said they didn’t notice a change in their gauge until the light came on and it was too late. I’m getting worried that Jeep has put an idiot feature on the temp gauge which forces it to stay in the middle even though the actual temperature may be changing. I’d rather know it’s climbing or falling so I can prepare for it (slow down, pull over, downshift, etc) before it’s too late. So – if there is a dummy feature, can it be removed to show the actual temp? what are other people's thoughts?

Author:	tjkj2002 [ Tue Nov 18, 2008 11:35 pm ]
Post subject:
Your temp gauge is just a fancy gadget,it only shows relitive readings.When the guage is centered your coolant temp can range from 178-225 degrees and the needle on the guage will not move. I have a little gizmo that I plug in my OBDII port and it records all the info the PCM sees from the sensors and I can plug it into my laptop and gragh the info,the temp reading go in a stairstep fashion till the t-stat fully opens then it drops and starts all over agian.The t-stat in the KJ starts to open at 195 degrees and does not fully open til 218 degrees.

Author:	03jeepkj [ Tue Nov 18, 2008 11:45 pm ]
Post subject:
This is what happend to me when I ended up blowing up the motor. I looked at my gauges, everything was fine then about 2 mins later i heard a ding and seen that darn light and the needle was in the red. Pulled over right away and motor was clunking and shut down by its self. All I said was S*, F* and so on.

Author:	Jeepjeepster [ Wed Nov 19, 2008 12:09 am ]
Post subject:
tjkj2002 wrote: Your temp gauge is just a fancy gadget,it only shows relitive readings.When the guage is centered your coolant temp can range from 178-225 degrees and the needle on the guage will not move. I have a little gizmo that I plug in my OBDII port and it records all the info the PCM sees from the sensors and I can plug it into my laptop and gragh the info,the temp reading go in a stairstep fashion till the t-stat fully opens then it drops and starts all over agian.The t-stat in the KJ starts to open at 195 degrees and does not fully open til 218 degrees. Care to tell where you got that and how much it was? Always wanted to hook my laptop up to my Jeep.. And idiot gauges is one reason I got my scan gauge.. Ive seen it as high as 230F in traffic and the gauge was still in the middle..

Author:	tjkj2002 [ Wed Nov 19, 2008 12:15 am ]
Post subject:
Jeepjeepster wrote: tjkj2002 wrote: Your temp gauge is just a fancy gadget,it only shows relitive readings.When the guage is centered your coolant temp can range from 178-225 degrees and the needle on the guage will not move. I have a little gizmo that I plug in my OBDII port and it records all the info the PCM sees from the sensors and I can plug it into my laptop and gragh the info,the temp reading go in a stairstep fashion till the t-stat fully opens then it drops and starts all over agian.The t-stat in the KJ starts to open at 195 degrees and does not fully open til 218 degrees. Care to tell where you got that and how much it was? Always wanted to hook my laptop up to my Jeep.. And idiot gauges is one reason I got my scan gauge.. Ive seen it as high as 230F in traffic and the gauge was still in the middle.. http://www.crecorder.com/website/userLogin.do?method=productInfo&page=1 I have the CRecorder,bought it from the MAC tool guy for $80.

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Author:	omGoddard [ Wed Nov 19, 2008 1:45 am ]
Post subject:
Mines, the same way. Wish it was a little more accurate, my past vehicles have been. I've even put a CAI on mine...then took it off. Even in the winter I haven't noticed anything.

Author:	RAYMAN975 [ Wed Nov 19, 2008 6:42 pm ]
Post subject:
when my engine died, the dealer told me it overheated. but my temp needle never went above normal. they said the block cracked and so much coolant got into the oil, it watered the oil down and siezed up the engine. but up until the engine shut itself off, it was running perfectly normal. just a couple weekd ago, my check engine light came on offroad, and the engine was sputtering, shut itself off, started it back up and it was fine, did that a second time about 20muntes later, so i drove through the creek, cleaned everything off, pulled back ashore, popped the hood and let it sit, few minutes went by and all of a sudden it seemed to be a lot of steam coming up(more than the usual steam from driving through water, but no coolant overflowed, it might have been nothing, but it just seemed like more steam than normal) looked at my temp needle and it was normal, right in the middle. let it sit for a long while, drove it back to the campsite, on the way there, the engine stuttered/engine light came on/safetey mode where it wont go above 2k rpm's, stopped, shut it off, started it back up, went to the campsite, popped the hood and let it sit for a half hour to an hour, and it was fine ever since... so who knows! my coolant was in the normal spot, wasnt overflowing, engine didnt seem too hot when i put my hand over it, and the radiator was clear, so i have no clue, first time it ever did that since i got the new engine. it didnt even act like that when my old engine died, it just shut off and didnt want to restart, finally about 20 minutes later when it DID restart finally, it ran really really rough, had to keep the rpms up, and it was spitting coolant out the exhaust. but none of those symptoms this last time a couple weeks ago

Author:	blake1827 [ Thu Nov 20, 2008 4:37 pm ]
Post subject:	temp gauge does work
Although my CRD is a different beast and thrives on heat I see a difference from my previous TJ. Does take longer to warm and if you just start it and let it idle the needle will barely move-even after 10 min. The Diesel motor wont heat up w/o the turbo spooling up. Also twice driving in the mountains in single and sub zero temps I've watched the temp go from normal just left of center and drop to about 1/4 to the left as I coast down a pass after a couple miles of not being in the throttle and freezing temps.

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