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1997 subaru legacy gt, 130,000 miles, why is my temp gauge bottoming out? mechanic told me it was just a coolant temperature sensor and that it would be fine after I replace that. I just bought the vehicle and I want to know if something else could be wrong.
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Sounds like the Coolant is not full and has a air bubble. It is very important to have the system filled complete. That would be the first step.Good luck and have a great day.
Ken, that sensor is part of the pump/gauge sender unit in the fuel tank. I went through that same wild goose chase on my Legacy. I found a bad solder joint on my unit which I was able to repair, so I now have one left over. If you need a nice used one with about 60K miles on it let me know. tscooter2 @gmail .com
Hi, have the same problem with my 1995 legacy gt twin turbo and the problem lyes with the ecu temp switch, it sound's like the ecu thinks the engine needs more fuel to start and run
There are two sensors, one for ECU temp. readings with two pin connector and other one with only one wire, which has been probably disconnected when you replaced the CPC solenoid - very close position.
As long as your gauge is still moving up, there's no real problem. You have heat coming from the heater. It's only a problem if it's getting too hot. What's going on is that you don't let the vehicle run long enough, and it's so cold outside that the engine stays cold. It raises in temp when your stopped because there's no airflow through the radiator. The thermostat just heats up the engine block, and won't change the reading on the gauge. When this goes bad your car will overheat in just a few miles.
I've had the same problem all year. I've had four different mechanics look at this car - 97 legacy with 2.5. I've had the coolant seals replaced, the radiator cap, the thermostat, the water pump - all to no avail. I've realized now that it only overheats shortly after running sustained high rpm's. Recently the last mechanic mentioned the bleeder valve (I didn't know it had one and think maybe he didn't know either - not a subaru mechanic). Recently it overheated again (again sustained high rpm's - apparently more prone to produce air in the system), I sat the vehicle on an incline (raising the bleeder valve to be the highest point) and let the car warm up and run for half an hour. Now 300 miles and no overheat. I went through alot with this car to get to this point. Unbelievable.
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