T180 Tickover

[doogal1]

when the outside temperature goes below zero my t180 ticks over at 1100rpm until running temp is achieved

when temp outside is above zero tickover is normal

are they all the same or is it just mine :(

[Rick D4D]

no mate mine odes the same, what mpg are you getting at the moment? I have just managed 39mpg driving like my grandma went to church and keeping the rpm under 2k, in the summer I can get about 9mpg more driving the same and easily get 43 so am I am a little shocked as I only got 33mpg or a 500mile round trip where as in the summer I got 45mpg driving the same trip the same speed.

[doogal1]

no mate mine odes the same, what mpg are you getting at the moment? I have just managed 39mpg driving like my grandma went to church and keeping the rpm under 2k, in the summer I can get about 9mpg more driving the same and easily get 43 so am I am a little shocked as I only got 33mpg or a 500mile round trip where as in the summer I got 45mpg driving the same trip the same speed.

you wont believe if i tell you short journeys in town outside temp -5 to -10

wait for it

wait for it

28.6mpg av one week driving use car every day reset trip one week ago

[Rick D4D]

28.6mpg av one week driving use car every day reset trip one week ago

Oh I do we are getting about 30mpg (over a tank of fuel) local driving short journeys at the moment with temperatures between -2 and 3 degrees, I was thinking we had a problem with the car ;)

[boozehound]

i think the EGR valve has something to do with this. I wonder what Mr T Thinks

[Beretta]

when the outside temperature goes below zero my t180 ticks over at 1100rpm until running temp is achieved

when temp outside is above zero tickover is normal

are they all the same or is it just mine :(

Happened last winter in the cold weather just the same as this year.

Every time you start up, up goes the tick over rate to around 1100rpm and it takes forever to come back down, so loads more fuel being thrown into the engine.

Spoke to the dealers last year, and all I got was "They all do it in the winter".

[boozehound]

all in the name of cleaner emissions as well, so use more diesel to keep the emissions cleaner, for <I thought I could get past the swearing filter - what a sad muppet I am eh?>s sake. as if crude oil wasnt precious enough

[boozehound]

and wot on earth is tht swearing filter all about, i didnt even swear!

[wastedagen]

when the outside temperature goes below zero my t180 ticks over at 1100rpm until running temp is achieved

when temp outside is above zero tickover is normal

are they all the same or is it just mine :(

Yep mine does the same. I've also found that if I have the inside temp set to anything above 19C the engine idles at 1100-1200rpm. If I then drop the inside temp to 19C or below the engine idle speed drops to normal 700-ish and the temp gauge rises from 1 block below centre to centre again.....................

This happens wether I have the AC on or not.

[bobbo7070]

Yep mine does the same. I've also found that if I have the inside temp set to anything above 19C the engine idles at 1100-1200rpm. If I then drop the inside temp to 19C or below the engine idle speed drops to normal 700-ish and the temp gauge rises from 1 block below centre to centre again.....................

This happens wether I have the AC on or not.

Mine too...

[Rumbly]

This is just a theory based on observation so I might be wrong!!

I've noticed that some diesels when started and left at idle take ages to produce any useful heat at the interior heater ... so perhaps diesels take longer to warm up, or produce little heat at idle. So if you set the temp high the only way the car can produce that heat is to increase the idle speed to generate the necessary heat .... Toyata engineers seem to have made this possible.

If the temp guage is reading below normal it means the engine is struggling to reach proper running temperature and turning the interior heat up won't help it to do so.

It seems Toyota engineers have built this in so the engine has more chance of running at proper temperature and keep the interior at a decent temprature in cold weather ... sounds like a good idea to me.

Just remembered .. think some Merc deisels had/have a device to manually increase idle speed in cold weather.

[local hero]

My Rav does the same (D4D,) earlier versions had a manual (idle up) switch which increased tickover for faster warm up in cold weather, never used it..Stew

[OldSkoO1]

Perfectly normal

Should only do it when aircon is on. Once ambient/cabin temp is reached, the fuel should be cut to power the compressor and you might experience a brief urge to stall if you at a standstill.

[david dey]

when the outside temperature goes below zero my t180 ticks over at 1100rpm until running temp is achieved

when temp outside is above zero tickover is normal

are they all the same or is it just mine :(

Mine revs at 1100 when cold (2.0 d4d) but the revs drop to 900 if I turn the heater fan off.

David Dey

[Aurissimo]

I think , similarly to Nissans and other cars i have had experience with. This diesel will have a small "electric heater", this is only used in very cold temperatures and to help cabin temperatures get up to "comfort level" quicker. Manufacturers do this because the step change from petrol performance and diesel in terms on heating the cabin is noticeable, so if a customer moves from a petrol car to a diesel, he would complain on the heater being rubbish... hence they have this added heater

Diesel engines being more Energy efficient, and hence taking longer to transfer heat to the heater/coolant system, takes a lot onger to get up to comfort level...

The electric heater is located in one of the heating tubes carrying the coolant fluid around the circuit.

As you can imagine the electric heater will consume a fair amount of extra power ( not sure how much), this will put extra load on the alternator, which in turn tells the engine management system to crank up the speed to ensure the alternator meets this extra load and does not drain the Battery, which would be really bad if you ran out of Battery , ( lights, etc...) in this kind of weather...

sound like setting the cabin temperature to the lowest value disables the electric heater working, on the basis that you selected this value, you are obviously ok with the cold... in which case just expect the cabin to take a lot longer to heat up...

all about compromises, do you want quick cabin comfort or better fuel, performance?

My biggest issue with the extra revs is that with the high torque of this engine , ice, trying to feather the throttle and go round tight roundabouts for example, it can get a bit tricky to stop the car from running aways without riding the clutch a little bit more than i would like to...