Elevated Idle Tuning:

These values will set up the Elevated Idle to function at all times that it's enabled in the DIC, only dependant on IAT.

{B2405} Elevated Idle Coolant Temp (Enable) 148 °C
{B2406} Elevated Idle Coolant Temp (Max) 151 °C

Most guys around here like the idle up when they stop at a lease or jobsite because the truck cab stays warm. (heater coolant flow doesn't fall off) Another problem that comes up when the engine is on regular idle: everything cools off under the hood enough to make the engine start to smoke alot. But the ECT never seems to drop quite enough to get the elevated idle to go again, (note the stock setting of 63 deg C on {B2405})

So I did some datalogging on this and came up with a value for {B2409} as well knowing the operating conditions I was shooting for.

{B2409} Elevated Idle Intake Temp (Max) 26 °C

Datalogging with an ambient of -14 deg C, the IAT remained quite close to ambient driving down the highway at 100kms/hr. But when the truck slows down, the IAT quickly rises as underhood air starts to displace the fresh air beside the airbox. Driving around town in the same conditions netted and increase to about +23 deg C. So for the elevated idle to come up again, the IAT would have to cool all the way down to 5 deg C to enable with the above ECT settings. By that time, everything else has cooled down significantly. So by setting the IAT enable around 26 deg C, this allows the elevated idle to re-enable right away. The temps in the IAT dropped to around +19 to +22 deg C all the time the elevated idle was on. This allows the engine to stay burning clean and the cab to stay warm. The oilfield guys around here love this modification. This will only work better as ambient air temperatures get lower.

Another tip: If you're running advanced injection timing and feel the need to lower the table "{B0915}Injection Timing ECT(C)", don't get carried away. I have played with this table extensively along with "{B0916}Injection Timing ECT (C) Multiplier" and I've found that if I lower the values near the idle and elevated idle running conditions, I end up with alot of smoke as this table seems to modify idle timing as well. In the end I only modify from about 15mm3 x 1000RPM and up. And now I leave the Multiplier table stock.

And if you choose to modify your VVT tables, again keep the lower zones in the idle and elevated idle range stock. I've played with open vane settings and stock vane settings extensively in cold climate, and it's amazing how much they change the warm-up time!:)

Thanks for the write up!

elevated idle , I love it! adjusting ramp time is nice too,it lets the truck warm up for atleast a couple seconds longer before hitting it with the higher rpm (b2410)
timing ECT is actually easy since i dont add fuel in lower areas my truck is pretty much stock so i take my injection timing C and subract stock timing C this leaves me with the increase that ive done to my modified timing table, then add this to the values in timing ECT virtually making my truck stock when its warming up to normal op tempature

timing ECT is actually easy since i dont add fuel in lower areas my truck is pretty much stock so i take my injection timing C and subract stock timing C this leaves me with the increase that ive done to my modified timing table, then add this to the values in timing ECT virtually making my truck stock when its warming up to normal op tempature

So you subract you're added timing from the ECT (C) table? Presumably you haven't made any changes in the lower areas of your Injection Timing C table? Just seeing how you do your math...;)

perhaps i worded it wrong

lets say for example at 1200 rpm and 40mm3 in the timing ect table this is the value that is added to stock timing ( pending the multiplier ofcourse)lets just say 10*
now take the stock timing lets just say at that smae point in the timing table we have 5* main injection timing

now we are @ 15* timing in a stock setting, now i come along and raise timing C to 10* at the same point ( just for example ) now the total timing is 20*

so i made a spreadsheet to take away the extra timing that ive added making it back to 15* untill the truck is up to operating tempature

Does this make more sense?

Thanks for the clarification. Just didn't know which way you were going with that. :)

I've done something very similar to that. But I still allow the stock ECT tables to have their effect when the trucks in elevated idle mode.

Maybe we should call this thread Alberta tuning!!! :D

Thanks for the clarification. Just didn't know which way you were going with that. :)

I've done something very similar to that. But I still allow the stock ECT tables to have their effect when the trucks in elevated idle mode.

Maybe we should call this thread Alberta tuning!!! :D

my truck is stock untill 54c ECT:)

one more thing, chnage your fuel amount in idle setting will increase fuel mileage b0755
it sucks to leave the truck running all day and loose a 1/4 tank:D

my truck is stock untill 54c ECT:)

one more thing, chnage your fuel amount in idle setting will increase fuel mileage b0755
it sucks to leave the truck running all day and loose a 1/4 tank:D
:exactly:

Awesome... I was wondering of a way to modify it so that it goes into high idle pretty much all the time.

Sweet Diesel, you got an email or something? When I get my V2 back I should modify the timing on my unit like your saying, I wouldn't mind a bit of coaching.

how much can I lower b0755?

my truck is stock untill 54c ECT:)

one more thing, chnage your fuel amount in idle setting will increase fuel mileage b0755
it sucks to leave the truck running all day and loose a 1/4 tank:D
just out of curiosity what table do you define the temp you want your changes to start. i see how you add the timing and such for a desired temp but what determines the temp. sorry for the dopey question but i am getting efi for christmas:D and this is one of the things i wanted to do. have a nice tune but not until it warms up to op temps. thanks

b0730-b0902 to b0905- b0916 are a few to name of,keep a eye on the parameters

b0730-b0902 to b0905- b0916 are a few to name of,keep a eye on the parameters
thanks, what about b0922-0925. ect timing after pilot. what will that do?

one more thing, chnage your fuel amount in idle setting will increase fuel mileage b0755
it sucks to leave the truck running all day and loose a 1/4 tank:D

Well, I am going to try that when I get a chance. But as far as I knew, the idle fueling is a dynamic entity, as the ECM tries to target the RPM's defined by {B0701} and adjust balance rates at the same time. I thought that {B0755} was a baseline and the ECM adjusts from there.

It does suck to lose 1/4 tank of fuel for idling...

thanks, what about b0922-0925. ect timing after pilot. what will that do?

well to the best of my knowlege, these tables control whe the pilot abcd kick in

when you start the truck it will go through each of these tables untill its up to operating temp ( pending start up temp)

normal op temp it will run inj timing after pilot D table unless you alter the parameters

how much can I lower b0755?


alter it in low increments untill it doesnt sound right and then bump it back up a bit

good info

Just out of curiosity... is there a way to alter that high idle stuff so that it oeprates at all temperatures and not just when it gets cool out?

I'm just figuring here: Set b2406 to 151, b2405 to 150, b2409 to 151...

That is basically taking what has already been mentioned to the extreme. The only drawback I can see is if it's quite warm outside and the motor could start heating up just sitting there on high idle if left for long enough.

I suppose the given settings are fine though seeing as it should go into high idle all the time as long as intake temp is below 28 degrees. Because now intake air temp is the governing factor of being on or off right?

I might just mod mine for a bit higher of a temp. There is advantages to having it on high idle versus regular idle. Drawback is it uses more fuel.

I'm gonna jump in here and fish for a bit of knowledge. Change gears and go to LBZ tuning if you're familiar.... One of my first semi-good tunes I advanced the timing and increased the boost a bit with hopes of getting better mileage. I also made an exhaust brake by changing the cane position at 0mm3 from 800 rpm on up to 95%. It works grat when the truck gets up to temp but when it is still warming up in the morning It will act like it does not see that part of the tune.

So I looked at the ECT and IAT parameters. Are those just another table or do those get added to the original table that it applies to ie desired boost,low alt, egr off.

Don't mean to hijack but the whole ECT tuning part jumped out and you guys seem to understand it pretty well.

Thanks
-Kyle

The Desired Boost ECT table modifies the base desired boost by adding these values to the base table values.
However, these values are further adjusted by {B2217} "Desired Boost Coolant Temp Multiplier".
The base Desired Boost tables are (B2204 to B2209).


this is EFI description,i assume it works?

Mine reads...

Adjusts the target vane position based on engine coolant temperature.
However, these values are further adjusted by {B2228} "Turbo Vane Target Position ECT Multiplier".

Hmmm... time to start tinkering. I'll post my results when I get it figured out.

-Kyle

well to the best of my knowlege, these tables control whe the pilot abcd kick in

when you start the truck it will go through each of these tables untill its up to operating temp ( pending start up temp)

normal op temp it will run inj timing after pilot D table unless you alter the parameters
thanks sweetdiesel, i appreciate the help. i will go and fool around a bit more.