95 Subaru hot start

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Old 02-06-09, 10:25 AM
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95 Subaru hot start

I have a 95 Subaru Legacy Wagon that is having trouble hot starting. The starter turns the car over and over but nothing happens. If I let the car sit for a bit then it fires right up. The check engine light is on the code was P0115 "Faulty coolant temperature sensor." I replaced the sensor, yet the problem has not gone away. To make matters more interesting, when cold starting the car usually starts fine, but sometimes for the first minute or two when I push on the accelator it feels like it is misfiring and the engine wants to die. Then when driving, the car seems to work just fine. Very strange. Please help! Thanks!
 

Last edited by fishing_fool; 02-06-09 at 11:44 AM.
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Old 02-06-09, 10:40 AM
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What you've described is typically the engine temp sensor. It delivers a richer mixture for cold starting and cold running. Then as things warm up it tell the computer to lighten up on the fuel in the mixture.

However there are usually two sensors on engines. One is for the computer that does as just described and the other is for the temp gauge. I'm not familiar with Subies, but if this is the case for your wagon, did you change the one for the computer?
 
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Old 02-06-09, 10:56 AM
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I replaced the one that is connected to the engine and the coolant resivoir. That has two wires that I would think go to the cpu. Maybe they only go to the gauge in the car.???
 
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Old 02-06-09, 11:04 AM
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It could be the case. What did the parts people who sold you the part tell you? They should know.

If it's going to the coolant reservoir, that could a sensor for the fan on the radiator.

Some of those may serve a dual purpose. Let me see what autozone references say about it.
 
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Old 02-06-09, 11:07 AM
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I only see one sensor at Autozone..I know that may not be accurate. Theres a temp switch, but I would presume thats for the fan.

It does say the ECT is located on the intake manifold. See this....AutoZone.com | Vehicle Selection - Year
 
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Old 02-06-09, 11:13 AM
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Here is what they show for the 1.8. They show a tempsensor (#9) at the thermostat housing and and thermometer (#8) just above the housing.

http://econtent.autozone.com:24991/z...5280066fd0.gif

Is this what yours looks like and is you engine the 1.8 or the 2.2?

Digging a little more..... the thermometer (#8) is the one they are showing as the sensor for the gauge. It looks like (#9) would be the one you want.
 
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Old 02-06-09, 11:24 AM
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I think so. My car is the 2.2 L. I do know it was a pain to remove (and to put back in). The folks at loveshorsepower.com put this great "how to" up with pictures: 1995 Subaru Legacy Coolant Temperature Sensor Replacement
Thanks!
 
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Old 02-06-09, 11:58 AM
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I see the one you're talking about. That's the one I would have replaced. I don't know why it didn't take care of it. There's always a chance the new one was bad, but I wouldn't count on that. When you get a fault code, the code is actually telling you there is something in the sensor circuit that's messed up. So the wiring circuit could be at fault.
 
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