Slightly concerned but sure Toyota have it covered. When starting from cold, the engine revs to almost 2000rpm instantaneously. My concern is poor lubrication whist the oil is still cold leading to engine wear. The engine soon settles down to a more acceptable tickover. I remember a post some time ago where someone suggested on Subaru engined cars if you fully press the accelerator at start up it starves the engine of fuel for a few seconds allowing the oil to circulate.
GR Yaris Cold starting
- Thread starter Edgey
- Start date
No
In cold weather, more fuel is needed for combustion because the liquid gasoline doesn't easily turn into a gas, which is necessary for efficient burning. If too much fuel is supplied while the engine is running at low speeds, the engine may stall because the excess liquid fuel extinguishes the spark. To counteract this, the RPMs are increased to expel the unburned fuel more quickly until the engine reaches a temperature where fuel vaporization is optimal. Once the engine is warm, the fuel-air mixture is adjusted back to normal
Toyota have put their best; and by association world's best engineers towards creating G16E-GTS
In terms of lubrication; our engines run 0W-20 engine oil. One of the thinnest oils money can buy. There are many reasons for it, fuel economy come to mind. However an additional advantage of a thinner oil is that it runs free-er when cold. Our engines come with three squirters which is downright bonkers. Further mitigating these issues
Finally when we pop the bonnet we find that there is no Subaru badge. (except for the 86) This means our engines are not horizontally opposed and suffer the same head-gasket and oiling issues
About your last sentence. Holy Teddy Jesus F.... Sh... - who in their right mind would rev a cold turbo-charged-to-the-tits engine. I mean I am more for it, because my Yaris will be worth even more
You want your car to last. Start the Yaris, let it do its song and dance, drive a few seconds later fairly gently. Once the message dissapears you can start driving normally and when the oil is warmed up (say ~80C+) it will be harvesting time at the berry factory. Change oil every 6 months (if you're in Australia that is the required change interval) and enjoy the car
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- Dec 27, 2021
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This It’s an engine. We humans have gotten pretty good at building them, Toyota in particular.
Even with indifferent care and maintenance the thing will likely run for thousands of hours without any mechanical problems.
People really shouldn’t be worrying about stuff like this.
Raised rpm and added noise is also because of added fuel combusted late to create instant hot exhaust gasses meant to quickly warm the catalyser that sits closely to the engine so it gets warm quickly and starts to work quickly.
Emission tests are done from cold.
Emission tests are done from cold.
Not just engines, lubrication technology, we've been using oil for a long time now and have got pretty good at that too.
It’s an engine. We humans have gotten pretty good at building them, Toyota in particular.
Even with indifferent care and maintenance the thing will likely run for thousands of hours without any mechanical problems.
People really shouldn’t be worrying about stuff like this.
It's a non issue, and no different to every other internal combustion engine car in existence.
Think you've misunderstood, putting the accelerator to the floor before starting (the 86 at least) doesn't start the engine, its for priming the oil system so you have oil nicely circulated rather than drained into the sump. Then you start it normally...
- Dec 27, 2021
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Struggling to understand how that's meant to work...
No idea, there's plenty of threads on the ft86 forum about it. People do it after oil changes
I think the theory is that by delaying the ignition you will be hanging off the starter for longer. Therefore whilst the starter is turning its circulating oil at the few hundred RPM that it turns at
In aviation we do crank with the mixture out after a 50/100HRLY to cycle oil through the filter as they are placed in worst possible position to be ‘prefilled’ (you make a massive mess as you rotate your arm in 4 different ways to get the darn thing on) - anyway, this is done so that the engine doesn’t have partial oil starvation for 0.5sec (or however long it would take to fill up)
I pronounce this hack Broscience
approved!I wonder what the starter and the battery would think of this. I also wonder why no manufacturers implement this features by cutting ignition during first 5 seconds of cranking of every start. Does, does, does this mean they think it’s unnecessary….? Blasphemy
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It prevents the engine from immediately starting. The reason this works is because the mixture is set by the computer for start with the throttle closed. By opening the buterfly the mixture is now too lean to start. Computer compensates but takes a while; some vehicles may refuse to start at all depedning on their programming. This is advantageous if you're programming for people who mistake gas pedal for the brake. In the meantime starter pumps oil through the system by rotating the engine over for more revolutions than it otherwise wouldOK, it’s off topic for here thenbut how on earth is that meant to help?
See my reply above if you want more details
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86/BRZ utilise fuel cut with pedal fully depressed. (aka flood clear). The engine will not start because there is no fuel
See https://www.ft86club.com/forums/showthread.php?t=108760
