[torr]

I have been testing this for the last 8 months with no problems.


Change all EKP values:
CHARACTERISTIC CURVES, FUNCTIONS, FAULT LIMITS, PUMP PARAMETERS and DATE, PUMP IDENTIFICATION and CHECKSUM ELECTRONICALLY CONTROLLED FUEL PUMP (EKP)
from value 50 to 51
(E90,E91,E92,E93,E87,E88,E81,E82,E84+!ETHANOL_E100 )+(N20,N55)+PU11+EKP_CI_13)

The EKP control unit controls the speed of the EKP by means of pulse width modulation of the EKP output voltage according to the fuel request. The supply characteristic curve of the EKP for the corresponding model series is stored in the coding data. The EKP control unit ensures reliable activation of the EKP up to a system voltage including 6 V.
The Digital Engine Electronics (DME) control unit or Digital Diesel Electronics (DDE) send the requirement request for the amount of fuel currently need to the EKP control unit.
The communication of the EKP control unit with the DME/DDE control unit takes place across the PT-CAN. The required fuel rate is passed on to the EKP control unit by the DME/DDE control unit in a message across the PT-CAN.

The data for the electronically controlled fuel pump system is encoded as follows:

- In the DME control unit or DDE control unit: engine- and model-related characteristic curves for fuel delivery according to requirements.

- In the EKP control unit: specific characteristic curves for the relevant fuel system (= fuel flow rate for cooling and lubrication of the fuel system)

The control variable is sent in the form of a CAN message to the fuel pump control module (EKPS). The control variable is sent in the unit l/h. The value range is 0-254 l/h.

Desired pressure and flow rate can be achieved by manually adjusting the data values in the CHARACTERISTIC CURVES.

I'm hoping Terry can adjust EKP data values to improve the JB4 N55 overall performance.

Also, I'm really interested in hearing how this has affected other Pure stage 2 users.

[Weehe]

I can vouch for this. Was able to run straight E85 with this. Have been running it for 6 months.

[houtan]

With the stock lpfp?

[Weehe]

Originally Posted by houtan

With the stock lpfp?

yup

[houtan]

interesting. so i can just code this using ncsexpert? never read the EKP module.

[Peter @ Pure]

This change only affects the lpfp, not the hpfp? What if you have stage2 lpfp?

[Steve @ BMS/Fuel-It!]

Did you start getting error codes? Were you testing this when you made this post?

http://www.n54tech.com/forums/showthread.php?t=30344

If you were getting errors, was it the fuel pump warning that pops up on the i-drive and did it resolve that?

[torr]

Originally Posted by Steve @ BMS/Fuel-It!

Did you start getting error codes? Were you testing this when you made this post?

http://www.n54tech.com/forums/showthread.php?t=30344

If you were getting errors, was it the fuel pump warning that pops up on the i-drive and did it resolve that?

Yes,
I was testing E100 coding when that post was created and never had a fuel pump error code.
I would be very interested to see how your stg2 pump performs with this coding.

[Abear]

Do you think this will work on the F30s? The actual control unit is a different part number, but I dont see why we wouldnt be able to code ours as well.

[fryj00]

Even if the Fuel-it stg 2 pump benefits from this better pressure/flow, won't the hpfp capacity remain the same?

[Steve @ BMS/Fuel-It!]

Correct, the HPFP capacity remains the same.

The EKP already goes to 100% PWM at about 60% load according to the testing we've done but it may be re-scaled at lower loads with this change.

This may also help with the fuel pump errors that occur on some cars as the limits for the amount of current draw the EKP/DME find permissible may be increased.

We'll have to test it.

[diesel3443]

Originally Posted by houtan

interesting. so i can just code this using ncsexpert? never read the EKP module.

+1, Really curious to this as well. I would love to run straight e85.

[fryj00]

I'm confused. If all this does is push the max PWM down a bit, how can that increase the pumps capacity to run that much more fuel? If PWM is already maxed out at high load, I would think you must increase the voltage used by PWM to gain any pump speed/pressure.

[Peter @ Pure]

Originally Posted by Abear

Do you think this will work on the F30s? The actual control unit is a different part number, but I dont see why we wouldnt be able to code ours as well.

On F series we get crappy hpfp's been there done that.

[torr]

Dear Terry,
Please make the N55 faster.

[diesel3443]

Power gains on stock turbo?

[obriennathaniel]

I would lovvveeeee to run straight e85 on my f30

[torr]

Has anyone given the E100 coding a try yet? Steve?
I am interested in hearing your impressions.

[Steve @ BMS/Fuel-It!]

I haven't had time to try it yet.

I'll try to get time today or tomorrow.

[torr]

Steve,
Did you ever get a chance to try this?

[obriennathaniel]

I neeeddddsssss this

[Steve @ BMS/Fuel-It!]

Nope...I went to try it and realized I was going to have to configure NCS Expert on that computer...it's been a while since I've played with that so I never got around to it.

[paradoxical3]

I don't understand, in my TRC file the values already seem to be set to 51? Except for Functions, for which numerous are selected. Should I de-select all of the other wert values except 51?

This is on a 2014 X1 35i M Sport for the USA.

[torr]

select CHARACTERISTIC CURVES Value 51, this will unselect value 50.
FUNCTIONS value 51 should already be selected with values (50,55,56,59).
FAULT LIMITS value 51 should already be selected with value 50.
PUMP PARAMETERS value 51 should already be selected with value 50.
select DATE AND PUMP IDENTIFICATION Value 51, this will unselect value 50.
select CHECKSUM ELECTRONICALLY CONTROLLED FUEL PUMP (EKP) Value 51, this will unselect value 50.
then program.

[paradoxical3]

Thanks torr, but my EKP already has exactly those values. It seems there is nothing for me to code as it came stock that way