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Old 01-08-2016, 01:02 PM   #1
Wrx2016Wrx
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Default Seems like my WRX takes way too long to warm up

Hey guys, first time to this forum, so Hello !

Now a quick question:

I have owned a lot of different brands in the past and this is my first time owning a Subaru. I love the WRX but there is one thing that I noticed that seems odd.

Warm up time :

Normally my other vehicals take 1-2 min of high idle before they drop to normal, which I take as the engine has done its morning stretch and is ready to be driven.

This new WRX sits in a heated garage all night and each morning when I turn it on, it sits at a higher idle for 5-7 min before dropping. This seem odd and I find it hard to believe that you should be waiting that long before you drive off.

So my question is, does this sound normal from your experience or is there possibly something wrong with mine ?

thanks for any input,
Cheers!
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Old 01-08-2016, 01:14 PM   #2
Loyale93
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Define "high idle".
If you let it sit for 30 seconds or so, and blip the throttle, it will usually drop down a good chunk of rpm.
Don't worry too much about warming up. Just don't thrash on it right away. You drive a modern Japanese vehicle. You can turn the key and drive away without worrying too much.

I know you said it sits in a heated garage, but please fill in your profile so we know where you live as local factors affect everything.
Also what vehicle you drive. Again, I know you said "new", but that could be new to you (2008), brand spanking just off the boat new (2016), leftover new (2015). Any number of things.

Welcome to the forum.
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Old 01-08-2016, 01:15 PM   #3
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Quote:
Originally Posted by Wrx2016Wrx View Post
This seem odd and I find it hard to believe that you should be waiting that long before you drive off.
That is odd, I can't believe you actually idle for 5 minutes before driving. Just start it and go. Different engine, different oil capacity, different coolant capacity, completely different vehicle.

I start my car in -20C, wait maybe 30 seconds at most, hit reverse and go. Takes about 3-5 minutes of driving before it even displays 30C oil temperature, coolant temperature gauge barely budges until 6-8 minutes of driving. Obviously I don't touch boost until it warms up (unless emergency).
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Old 01-08-2016, 01:20 PM   #4
Loyale93
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Quote:
Originally Posted by mishapopa View Post
That is odd, I can't believe you actually idle for 5 minutes before driving. Just start it and go. Different engine, different oil capacity, different coolant capacity, completely different vehicle.

I start my car in -20C, wait maybe 30 seconds at most, hit reverse and go. Takes about 3-5 minutes of driving before it even displays 30C oil temperature, coolant temperature gauge barely budges until 6-8 minutes of driving. Obviously I don't touch boost until it warms up (unless emergency).
Almost like you drive a modern vehicle.
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Old 01-08-2016, 01:28 PM   #5
Wrx2016Wrx
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Quote:
Originally Posted by Loyale93 View Post
Define "high idle".
If you let it sit for 30 seconds or so, and blip the throttle, it will usually drop down a good chunk of rpm.
Don't worry too much about warming up. Just don't thrash on it right away. You drive a modern Japanese vehicle. You can turn the key and drive away without worrying too much.

I know you said it sits in a heated garage, but please fill in your profile so we know where you live as local factors affect everything.
Also what vehicle you drive. Again, I know you said "new", but that could be new to you (2008), brand spanking just off the boat new (2016), leftover new (2015). Any number of things.

Welcome to the forum.
2016 WRX in AB, Canada.
High idle would be apx 1800rpm then drops to apx 1000rpm after 5-7min.
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Old 01-08-2016, 01:47 PM   #6
taylort4
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I am in Maine with a 2016 WRX and I see the same exact thing. Gets friggin cold here and mine is in a garage (not heated by connected to my house) that is about 50 degrees or more. I let my car warm up for about 5 minutes or more haha to make sure my oil is not so thick due to the cold. Spent too much on this to mess around. So I think it is normal, but I waste a decent amount of gas doing so lol.
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Old 01-08-2016, 02:15 PM   #7
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I have a 2014 WRX and experience the same thing with "colder" weather in Northern Cali. It's typically 40F~50F whenever I commute to work/home, so it's not anywhere close to snow temps. If I find myself wanting to drive spirited before hitting the highway, then I'll give my car 3~5 minutes to warm up.

As long as you're waiting for the secondary fan to finishing running (usually the first 30 seconds or so), then it would be fine to start driving off. Just drive gently and don't hit boost until warmed up.
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Old 01-08-2016, 02:17 PM   #8
Jack
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step 1: Get in the car
step 2: Start the car
step 3: Put on seat belt
step 4 (optional): Plug in radar detector, turn on lights, turn on windshield wipers, turn on radio, turn on heat.
step 5: Just drive the damn thing
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Old 01-08-2016, 03:20 PM   #9
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I agree with mishapopa and Loyale. I'll let my engine run for maybe 20-30 seconds first thing in the morning, then back out of my garage. The smart thing to do after that is to drive like an adult, at least until the temp gauge stabilizes. I try to keep revs at or below 3000 for the first few miles or so on a cold (50 degrees or below) day.
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Old 01-08-2016, 05:59 PM   #10
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If these are the things you're worried about, get a hobby.

The ECU has a set point that it monitors (engine coolant I'm guessing). While it's below the temperature setpoint it will keep the engine at its max idle RPM (another setpoint). From there they probably have it set up on a hysteresis with engine temperature and RPM on their own axis. As the engine temperature increases, the RPM decreases until it hits the temperature setpoint which means you should be at your RPM idle setpoint too.

There's probably a few more variables in the mix but that's the general gist of it.

If you read about idle/warmup you'll get a lot of different perspectives. Some people say to wait twice the amount of time it takes the coolant to get up to temp before driving it hard. Some say to let the coolant warm up completely before driving it and then wait X minutes/miles/etc until driving it hard. Others say let it idle for 30 seconds then drive the car gently until X minutes/miles/etc until driving it hard.

Personally, I let it sit for 30 seconds and then go. You can feel once the engine and transmission is warmed up so I wait for that until I drive it harder.
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Old 01-08-2016, 07:29 PM   #11
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I too do the 30-40 second warmup routine, but when the temperature is forecast to be 30 degrees F or less at night, I plug in the engine block heater for at least a couple of hours (usually overnight). And also like they suggested, try to stay out of the turbo and high rpm until the engine coolant and oil are full warm. Just my two cents.

I read on this forum, (so it's a lot better than my brother's cellmate's cousin said) that the longish warm up is to get the first catalytic converter up to operating temps faster. A tuner might be able to adjust the fast idle to reduce the time it takes to come down to a slower idle. But regardless the engine does warmup faster after being warmed by the block heater, if you want to mess with that.
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Old 01-08-2016, 08:28 PM   #12
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Quote:
Originally Posted by jw4902 View Post
I too do the 30-40 second warmup routine, but when the temperature is forecast to be 30 degrees F or less at night, I plug in the engine block heater for at least a couple of hours (usually overnight). And also like they suggested, try to stay out of the turbo and high rpm until the engine coolant and oil are full warm. Just my two cents.

I read on this forum, (so it's a lot better than my brother's cellmate's cousin said) that the longish warm up is to get the first catalytic converter up to operating temps faster. A tuner might be able to adjust the fast idle to reduce the time it takes to come down to a slower idle. But regardless the engine does warmup faster after being warmed by the block heater, if you want to mess with that.
Engine block heater? That's wayyyyy over the top. Especially at 30f. I think most people start using engine heaters around 0f. Usually diesels like to around 30f though.

The longish warmup isn't really for the cat though it does need to get up to temp to be effective. The warmup is mainly for the fluids which change viscosity as their temperature change.

I wouldn't do any tuning to modify the idle rpm/time parameters. Subaru didn't pick these numbers out of the air.
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Old 01-08-2016, 09:27 PM   #13
antifeik
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Mine do the same thing, my 2013 Impreza didn't take that long to warm up, that's strange. I don't know how can you all consider it normal. Mine takes good 15 mins or 10 miles to the temperature gauge move up to the middle.
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Old 01-08-2016, 09:32 PM   #14
Chispo
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My 2016 rex takes a while to warm up, much more than any other car I had. Seems strange to me.
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Old 01-09-2016, 10:37 AM   #15
jw4902
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Quote:
Originally Posted by Brent22 View Post
Engine block heater? That's wayyyyy over the top. Especially at 30f. I think most people start using engine heaters around 0f. Usually diesels like to around 30f though.

The longish warmup isn't really for the cat though it does need to get up to temp to be effective. The warmup is mainly for the fluids which change viscosity as their temperature change.

I wouldn't do any tuning to modify the idle rpm/time parameters. Subaru didn't pick these numbers out of the air.
Thanks. The weather forecast calls for negative numbers on Sunday night, so maybe I do need it sometimes at least. Anyway I have it and its not hard to use and I like to think that engine wear might be reduced because the oil is able to do its job better in the first few seconds after I start it due to the engine block being a little warmer. At 30F outside air temp (the garage is warmer, using the block heater and then letting the engine warmup for 30-40 seconds) I get full warm on the stock temp gauge right at three miles of ~ 40mph (one stop light) driving which is just as I get on the Interstate highway. Anyway, it seems to work for me.
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Old 01-09-2016, 11:22 AM   #16
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I use the block heater every time I'm near a plug and it's less than -15C ambient because why not. The less warm up time on your engine, the more fuel efficient trip, premium gasoline is much more expensive than electricity... but I'm pinching at pennies here. The real reason I do it is to reduce engine wear out as much as I possibly can.
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Old 01-09-2016, 12:47 PM   #17
Steve Theodore
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Realistically with any modern turbocharged engine, just stay out of boost until things are properly warmed up. Regarding idling, I always chuckle when people tell me about 5-15 minute warm-ups (some people actually wait over 10 minutes!). That's just crazy.
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Old 01-10-2016, 11:57 PM   #18
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Quote:
Originally Posted by Steve Theodore View Post
Realistically with any modern turbocharged engine, just stay out of boost until things are properly warmed up. Regarding idling, I always chuckle when people tell me about 5-15 minute warm-ups (some people actually wait over 10 minutes!). That's just crazy.

I get it I mean people just want to protect their investment. You've got a nice car you want to treat it as such. I do stay out of boost until it's warmed up but other than that I just drive the car. I don't know how it is for anyone else here but I'm trying to extend the longevity of this car as much as I can.
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Old 01-16-2016, 02:21 PM   #19
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idling excessively is far worse than driving modestly when the car is cold frankly.
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Old 01-16-2016, 02:24 PM   #20
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Try driving a TDI...things take over 20 minutes before you can squeeze usable heat out of the vents. My commute in the morning is 15-20 mins but only 8 city miles and my car won't even be at 1/4 heat by the time I reach my works parking lot.

My 2015 WRX warms up at the 3-5 minute mark about 2 miles into my journey, at least to the point where I can use the heater.
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Old 01-16-2016, 02:36 PM   #21
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Originally Posted by Gro Harlem View Post
Try driving a TDI...things take over 20 minutes before you can squeeze usable heat out of the vents. My commute in the morning is 15-20 mins but only 8 city miles and my car won't even be at 1/4 heat by the time I reach my works parking lot.

My 2015 WRX warms up at the 3-5 minute mark about 2 miles into my journey, at least to the point where I can use the heater.
I always laughed at people idling diesels trying to warm them up in really cold weather... it just wont work.
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