odd temp gauge prob...opinions?

[grsupra87]

Sorry if this is obvious and I don't get it, but...I recently had to replace a coolant hose (the short 90 under the distributor) and now I get strange temp gauge readings. When the car is warmed up and either idling or cruising, it stays right at halfway as it should, but when I accelerate the needle dips down, and sometimes even into the cold (dead bottom). I made sure my overflow isn't dry. It doesn't overheat, even on a 20+ mile cruise. What am I missing?
Thanks!

 

[suprasick]

Not sure on your problem but out of the two supras i have owned the stock temp gauge isnt really that realiable. Also i've never seen the warm up temp go past 1/3 of the gauge except when the head gasket blew...

 

[Big Wang Bandit]

I have the same thing now that I did my tranny swap and had to undo my heater hose... Im gonna burp the system tonight.

 

[koulee]

You running a tstat right? Maybe a busted sensor.

 

[grsupra87]

yeah, I'm running a tstat. Its just weird that it started right after I replaced the hose. I checked today to see if there was a kink in it...no its cool. Maybe I have a short where when I accelerate and the engine rolls a little it makes a short? I know thats a stretch, but I'm baffled. Thanks for the replies!

 

[Big Wang Bandit]

I would burp it. I think mine is like that because of air int he system.

 

[grsupra87]

ok, I'll do it. So, correct me if I'm wrong, but I park it at an incline, like the front on ramps, and run it with the rad cap off? Is that right?

 

[Big Wang Bandit]

Im gonna do it now. I jsut usually park on the street and un it without the cap for like 5 mins

 

[grsupra87]

Thank you, sir. I always try to do the simple easy inexpensive thing first!

 

[Figit090]

maybe you have too much antifreeze in the mix? maybe. no clue other than that... i dont know if you can get a car to run too cold unless its in cold weather with that mix...

 

[grsupra87]

Thanks for the ideas. Burping it didn't help, so??? I dunno. It's a mystery. I guess next I'll flush the system. But I'm repainting the car (again) so it's gonna wait for now. Thanks again.

 

[Big Wang Bandit]

I fixed mine. On the T-Stat housing there are ajumble of wires.(left of the cam cover) there is a white connector. Its like yellow with a gren stripe Unoplug it and plug it back in. Just re-seat it. Fixed my problem!

 

[89Joe]

Have you checked the thermostat? I remember very vaguely, that sometimes it can get stuck either open or closed, causing abnormal temp readings.


-Joe

 

[grsupra87]

Interestingly enough, when I run it with the cap off, the antifreeze will come up and run over. If I give it throttle, the antifreeze level sinks down out of sight, until I let off and then it come back up (and over). It did give off some air bubbles though...I will try the yellow/green stripe wire next, and then prolly change the t-stat.