Hi, i have a question to ask and i HOOOOOOPE someone can tell me what is wrong with my car....

 

Every winter time when it comes my car ugh so stubborn starting up i cldn't figure out why it won't start up during winter when its COLD out. Other than that it started up just fine. Anything wrong with it or it just dont like me driving in the cold weather hehe

 

tried putting dry gas in the gas tank...nope, changed fuel dispenser something like that...nope, i can't find anything else wrong

 

The specialist told me its the sensor...wanna make sure it is the sensor or can it be the other reasons?

 

please help thank you!!!!!!!!!!

I doubt that it is the temperature sensor for the ECU causing this but I suppose it could be. I would check the resistance of it while it is cold before replacing it to confirm it is bad.

 

Things I think you should look into to help with this are as follows:

 

1. If you leave the car outside are you using the correct oil viscosity for the temperature outside? If the starter turns slowly you may need a lighter grade oil.

 

2. Are the sparkplugs in good condition?

 

3. If you have a cold start valve, what is it's condition?

Welcome to the board, Alithea

Glen brings up some good points which deserve checking, but your SPFI system has no cold start valve, this function is solely the duty of the ECU.

For it to accomplish this action it must know the engine is cold.

This is the job of the FI coolant thermosensor.

You can have it tested but sometimes it is as simple as cleaning the contacts in the connector.

I believe you will find this sensor on the pass. side of the upper rad hose fitting. There are two sensors for temperature on this fitting one for the FI system the other for the dash temp gauge.

The one you want to look at has a pig tail wire with a connector on it. (the other will have a wire connected directly to it)

If you find the thermosensor and would like to test it, I can send you a chart of it's resistance vs temperature.

Hope this helps somewhat

Hi guys. thanks for replying to my car problem. I'll check it tomorrow.If its not too much trouble, can you send me the chart resistance vs temp . that will help alot.....Again, thanks alot....Alithea

hey its me again....u know im :cornfuzz: abt cars i had to show my dad this to explain in english so i can understand wha u guys were saying... haha i just love my subaru subaru rocks and didnt wanna to get rid of it =\

 

thanks!

Your welcome for the help. As your father probably explained to you about this, the sensor tells the ECU (engine or electronic control unit) what the temperature of the engine is by its' resistance. As the engine temperature changes, the resistance of the sensor changes. The ECU sees these resistance changes as current changes in the circuit due to the changing resistance. As the engine warms up, the sensor will let the ECU know to send less fuel to the engine as it needs less when warm.

It never hurts to be sure your battery terminals and clamps(the things that hold the wires onto the battery) are clean and have good contact. In winter your starter works harder on the cold motor and draws more current. Also as soon as you get the thing going you probably crank up the heater blower for the defrosters while the cars idling and not making much lectricity(alternators don't work at idle most of the time). This causes the charging system to have to replenish the electricity used in that first brief period and when you rapidly charge a battery it gives off gases which cause corrosion of the terminals. Iv'e had a subaru competely fail to crank(not even a click) and after cleaning the green crap off the terminals it fired right up.

 

Anyway good luck, Brad

It never hurts to be sure your battery terminals and clamps(the things that hold the wires onto the battery) are clean and have good contact. In winter your starter works harder on the cold motor and draws more current. Also as soon as you get the thing going you probably crank up the heater blower for the defrosters while the cars idling and not making much lectricity(alternators don't work at idle most of the time). This causes the charging system to have to replenish the electricity used in that first brief period and when you rapidly charge a battery it gives off gases which cause corrosion of the terminals. Iv'e had a subaru competely fail to crank(not even a click) and after cleaning the green crap off the terminals it fired right up.

 

Anyway good luck, Brad

On a sube i had in the past the grounds always needed to be adjusted when the weather turned cold. As soon as the temp would change drastically it would fire off as quick. Check all your grounds. that might be it.