driving on Low RPM - Toyota Yaris Forums

henry33 · 09-06-2010, 03:27 AM

is driving on rpm lower than 2000 hurting the engine or damaging something ?
I have 6 speed manual trans.
thanks

Pingouin · 09-06-2010, 04:34 AM

I'd like to know as well. With my focus, I could happily move along at 1500RPM ish or lower, but my Yaris feels like it's struggling. I could also change gear at 2000RPM on the Focus, but the Yaris feels unhappy unless I hit 3000RPM.
I should try harder as I'm not going to save on petrol if I always have to rev higher :(

henry33 · 09-06-2010, 07:16 AM

I was accustomed to do the same but have read somewhere that it is not good for Yaris engine

Yaris Hilton · 09-06-2010, 01:21 PM

No, it won't hurt a thing.

henry33 · 09-06-2010, 03:19 PM

glad to hear that thanks hilton

tidus1203 · 09-07-2010, 04:13 AM

What's important is it does not lug, you know the engine vibrates due to lack of power on a given gear... If it does not lug then you're fine...

henry33 · 09-07-2010, 05:11 AM

no the engine is able to run at 1500 rpm very smoothly and have enough power to accelerate without shifting down so it should be ok ;)

why? · 09-07-2010, 12:19 PM

Quote:

Originally Posted by Yaris Hilton

No, it won't hurt a thing.

+ a bajillion. It will take time getting use to the Yaris, especially coming from a high torque car, but the Yaris runs fine in the low rpm ranges. I shift at 2000 rpm's and try not to ever go higher, and my car runs fine.

TLyttle · 09-08-2010, 01:12 AM

4-holers don't like to lug, and what is lugging is unique to every engine. I never push my Yaris below 2 grand, and it cruises fine at 1500. RPM isn't that big a problem for fuel economy, it is throttle opening that hurts...

Pingouin · 09-08-2010, 03:27 AM

I can confirm that my Yaris coasts fine at 1500RPM (in fact isn't it when the eco thingy that cuts off the petrol to save it goes off?) and I can change speeds at 2000RPM alright. It's just that coming from a 1.6L petrol car, the Yaris lacks serious punch when doing so. But I guess I can't have both that and high MPG! :D
Mind you, I leave in town, so I don't really ever need to floor it! Can't go much faster than the car in front of me, can I?

henry33 · 09-08-2010, 03:50 AM

Tlyttle : how do you know when the throttle is opening ?

PIngouin : the same situation I am living in the city and when you have car in front it is hard to floor it down :D usually I am cruising at 50-60 km/h :)

bankrobber · 09-08-2010, 09:51 AM

Quote:

Originally Posted by henry33

Tlyttle : how do you know when the throttle is opening ?

PIngouin : the same situation I am living in the city and when you have car in front it is hard to floor it down :D usually I am cruising at 50-60 km/h :)

Throttle is open when gas pedal is pushed. Not a mechanic here but I dont think fuel injection has a throttle. It's all electronic right?

Yaris Hilton · 09-08-2010, 10:54 AM

If you don't hear knocking and the car doesn't shudder, you're not "lugging" an engine.

RedRide · 09-08-2010, 01:53 PM

A little common sense can go a long way. How low you should go on the RPMs is dependant on the gear and if you are going uphill etc.
Understanding this is part of driving.

One can get a feel if you are "luging" an enging and then, shift acordingly.

Lugging an engine can put more stress on the wrist pins, con rod bearings etc. It just simple, basic physics that it does. I'm not going to debate any one who says it doesn't.
The only thing that is debatable is at what point you are indeed lugging the engine and that point can only be determind by the imediate driving conditions, not by some sort of chart or table etc.

detroiter · 09-08-2010, 02:10 PM

You'll know your lugging the vehicle just as Hilton stated, you'll have next to no power/pull, car will be shuddering and feel like it's gagging to stay alive. As long as the car is running and pullin smooth, your smooth sailin

RedRide · 09-08-2010, 02:19 PM

Quote:

Originally Posted by detroiter

You'll know your lugging the vehicle just as Hilton stated, you'll have next to no power/pull, car will be shuddering and feel like it's gagging to stay alive. As long as the car is running and pullin smooth, your smooth sailin

It's not a question of the enging running "smooth". Modern ECUs will always adjust things (timing fuel,etc) to make the enging run smooth.
The issue is subjecting the wrist pins, con rod bearings etc, to extra stress. Like I said, it's simple, elementry physics.

detroiter · 09-08-2010, 02:21 PM

Modern ecu or not, a car on the verge of stalling due to being lugged is going to happen regardless. So if what your saying is true, then your car would be running smooth at 200 rpms while it's choking to death going down the road. I don't see that happening.

RedRide · 09-08-2010, 04:13 PM

Quote:

Originally Posted by detroiter

Modern ecu or not, a car on the verge of stalling due to being lugged is going to happen regardless. So if what your saying is true, then your car would be running smooth at 200 rpms while it's choking to death going down the road. I don't see that happening.

Well, of course you are going to stall the engine sooner or later. That is not the issue at hand.
I assume we are all "smarter than a fith grader".

09-06-2010, 03:27 AM	#1
henry33 Drives: yaris1.33 Join Date: Jul 2010 Location: slovakia Posts: 425	driving on Low RPM is driving on rpm lower than 2000 hurting the engine or damaging something ? I have 6 speed manual trans. thanks

09-08-2010, 02:10 PM	#15
detroiter Drives: 2008 Polar White LB Auto Join Date: Oct 2008 Location: Metro Detroit Posts: 1,238	You'll know your lugging the vehicle just as Hilton stated, you'll have next to no power/pull, car will be shuddering and feel like it's gagging to stay alive. As long as the car is running and pullin smooth, your smooth sailin __________________ I live my life a quarter pounder at a time. And for those 500 calories or more, I'm free. I need FRIES! Two of them. The big ones. Oh, and I need them tonight. You're lucky the double shot of BBQ sauce didn't blow the seam on your nugget box. There she is, 2 pounds of pure beef. My dad ate it in 9.0 seconds flat. Check it out, it's like this. If I lose, winner takes my happy meal. But if I win, I take the burger and the toy. To some people, that's more important.

09-08-2010, 02:21 PM	#17
detroiter Drives: 2008 Polar White LB Auto Join Date: Oct 2008 Location: Metro Detroit Posts: 1,238	Modern ecu or not, a car on the verge of stalling due to being lugged is going to happen regardless. So if what your saying is true, then your car would be running smooth at 200 rpms while it's choking to death going down the road. I don't see that happening. __________________ I live my life a quarter pounder at a time. And for those 500 calories or more, I'm free. I need FRIES! Two of them. The big ones. Oh, and I need them tonight. You're lucky the double shot of BBQ sauce didn't blow the seam on your nugget box. There she is, 2 pounds of pure beef. My dad ate it in 9.0 seconds flat. Check it out, it's like this. If I lose, winner takes my happy meal. But if I win, I take the burger and the toy. To some people, that's more important.

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09-06-2010, 04:34 AM	#2
Pingouin Drives: Yaris Join Date: Sep 2010 Location: Outside of it Posts: 28	I'd like to know as well. With my focus, I could happily move along at 1500RPM ish or lower, but my Yaris feels like it's struggling. I could also change gear at 2000RPM on the Focus, but the Yaris feels unhappy unless I hit 3000RPM. I should try harder as I'm not going to save on petrol if I always have to rev higher :(

09-06-2010, 07:16 AM	#3
henry33 Drives: yaris1.33 Join Date: Jul 2010 Location: slovakia Posts: 425	I was accustomed to do the same but have read somewhere that it is not good for Yaris engine

09-06-2010, 01:21 PM	#4
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	No, it won't hurt a thing.

09-06-2010, 03:19 PM	#5
henry33 Drives: yaris1.33 Join Date: Jul 2010 Location: slovakia Posts: 425	glad to hear that thanks hilton

09-07-2010, 04:13 AM	#6
tidus1203 Drives: 2009 Yaris 1.5 M/T 5dr. Join Date: Jul 2009 Location: Philippines Posts: 8	What's important is it does not lug, you know the engine vibrates due to lack of power on a given gear... If it does not lug then you're fine...

09-07-2010, 05:11 AM	#7
henry33 Drives: yaris1.33 Join Date: Jul 2010 Location: slovakia Posts: 425	no the engine is able to run at 1500 rpm very smoothly and have enough power to accelerate without shifting down so it should be ok ;)

09-08-2010, 01:12 AM	#9
TLyttle Drives: 07 Yaris sedan Join Date: Jun 2007 Location: Keremeos BC Posts: 986	4-holers don't like to lug, and what is lugging is unique to every engine. I never push my Yaris below 2 grand, and it cruises fine at 1500. RPM isn't that big a problem for fuel economy, it is throttle opening that hurts...

09-08-2010, 03:27 AM	#10
Pingouin Drives: Yaris Join Date: Sep 2010 Location: Outside of it Posts: 28	I can confirm that my Yaris coasts fine at 1500RPM (in fact isn't it when the eco thingy that cuts off the petrol to save it goes off?) and I can change speeds at 2000RPM alright. It's just that coming from a 1.6L petrol car, the Yaris lacks serious punch when doing so. But I guess I can't have both that and high MPG! :D Mind you, I leave in town, so I don't really ever need to floor it! Can't go much faster than the car in front of me, can I?

09-08-2010, 03:50 AM	#11
henry33 Drives: yaris1.33 Join Date: Jul 2010 Location: slovakia Posts: 425	Tlyttle : how do you know when the throttle is opening ? PIngouin : the same situation I am living in the city and when you have car in front it is hard to floor it down :D usually I am cruising at 50-60 km/h :)

09-08-2010, 10:54 AM	#13
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	If you don't hear knocking and the car doesn't shudder, you're not "lugging" an engine.

09-08-2010, 01:53 PM	#14
RedRide Drives: '09 Yaris carmine red 2d HB Join Date: Jun 2009 Location: Middletown, NY Posts: 1,501	A little common sense can go a long way. How low you should go on the RPMs is dependant on the gear and if you are going uphill etc. Understanding this is part of driving. One can get a feel if you are "luging" an enging and then, shift acordingly. Lugging an engine can put more stress on the wrist pins, con rod bearings etc. It just simple, basic physics that it does. I'm not going to debate any one who says it doesn't. The only thing that is debatable is at what point you are indeed lugging the engine and that point can only be determind by the imediate driving conditions, not by some sort of chart or table etc.