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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > A New Software Fix (dealer Claim) For Hpfp: Tune Interaction/issues



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      04-01-2010, 10:07 AM   #1
bonwit904
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A New Software Fix (dealer Claim) For Hpfp: Tune Interaction/issues

Just brought my 09' 335 in for extremely long cranks, and on some mornings the engine almost stalling untill you give it some throttle.

I was expecting them to replace the HPFP, but they said BMW just came out with a software update to the ECU that should fix these issues and thus are no longer reccomending fuel pump replacement.

1. Has anyone heard of (or have any experience) with this software update so far?
2. And now the big one - does anyone have any knowledge of implications for tuning (JB+) that did not exist before the update?
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      04-01-2010, 10:19 AM   #2
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I got that update a few days ago. After my dealer visit I went to get giac flash again and it did not work. The place tried several times with different files from giac but every time it failed. And took the place few hours to get stock file back in because that was failing too. In my opionin there's some sneaky with this update.
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      04-01-2010, 10:41 AM   #3
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Quote:
Originally Posted by Luckydacuz View Post
I got that update a few days ago. After my dealer visit I went to get giac flash again and it did not work. The place tried several times with different files from giac but every time it failed. And took the place few hours to get stock file back in because that was failing too. In my opionin there's some sneaky with this update.
That is confirmed, as far as GIAC is concerned anyway. It seems the new software update is specifically directed against them (or tuners working with the same procedure). Here's what I posted in another thread on this issue today:

Quote:
Originally Posted by Alpina_B3_Lux View Post
It also seems - from what GIAC told me on the phone yesterday - that they have some issues with the new BMW software (ISTA/P v.37.0) which seems to have introduced some new code that they have to work around. As a number of people here will have such version on their car, they want to make sure their stage 2 flash works with that version as well.

That is also the reason why I'm running a JB3 right now.

Alpina_B3_Lux
It would seem that only GIAC is impacted by this, as my JB3 works flawlessly and friends of mine have the same software version and run the Evotech flash which also worked without any issue.

Alpina_B3_Lux
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      04-01-2010, 10:57 AM   #4
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Now I guess it's a waiting period to see how long giac takes to handle this situation. Hopefully it's a quick process. I hate driving around stock.
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      04-01-2010, 11:07 AM   #5
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Originally Posted by Luckydacuz View Post
Now I guess it's a waiting period to see how long giac takes to handle this situation. Hopefully it's a quick process. I hate driving around stock.
They told me they already knew what to do to work around this, they just need some days to write the necessary code. I'd say that in the week after Easter it should be done.

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      04-01-2010, 11:08 AM   #6
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Quote:
Originally Posted by Luckydacuz View Post
I got that update a few days ago. After my dealer visit I went to get giac flash again and it did not work. The place tried several times with different files from giac but every time it failed. And took the place few hours to get stock file back in because that was failing too. In my opionin there's some sneaky with this update.
Do you think JB+ will be safe? Since the JB+ theoretically at least is a less invasive tune than the JB3, I would think, but it does impact the engine differently since it doesn't controll corresponding fuel and timing controlls (from my understanding). I am going to run the JB+ at default setting.
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      04-01-2010, 11:17 AM   #7
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Quote:
Originally Posted by Alpina_B3_Lux View Post
They told me they already knew what to do to work around this, they just need some days to write the necessary code. I'd say that in the week after Easter it should be done.

Alpina_B3_Lux
The sooner the better. Had some plans to have some friendly runs this weekend but those are out the door. Ha ha
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      04-01-2010, 11:26 AM   #8
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i would like to see how it effects the other tuning software, subscribed to find out
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      04-01-2010, 11:36 AM   #9
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The software update to fix the long cranks/HPFP is total bull****. How do they expect software to fix a pump that almost always fails a leak down test when someone complains of long cranks or limp modes? If a suspect pump fails a leak down test, the problem is obviously mechanical (hardware) and not software. Also, if a problem is software based, everyone with that version of software would be affected. Not everybody that owns a 335i has had their HPFP replaced.
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      04-01-2010, 11:54 AM   #10
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I had my pump replaced with the new one about a month ago. The car is at the dealer now for long cranks and I should be getting it back today. My SA told me once the new pump is installed the car needs to have the software updated. He said if the software is not updated, the car will have long cranks and have fuel pressure and fuel pump plaussability codes.

Ill update once I have the car back
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      04-01-2010, 12:03 PM   #11
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Quote:
Originally Posted by bonwit904 View Post
Do you think JB+ will be safe? Since the JB+ theoretically at least is a less invasive tune than the JB3, I would think, but it does impact the engine differently since it doesn't controll corresponding fuel and timing controlls (from my understanding). I am going to run the JB+ at default setting.
As stated earlier, the JB3 works fine with the new BMW software; it's what I'm running currently (map 5). I would bet that the JB+ also works without any problems.

Quote:
Originally Posted by Luckydacuz View Post
The sooner the better. Had some plans to have some friendly runs this weekend but those are out the door. Ha ha
You tell me...I wanted to go racing on the Nürburgring this week-end with the GIAC stage 2 flash...

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      04-01-2010, 12:04 PM   #12
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same for me over here. Had long cranks and the dealer was not allowed to replace the pump. They had to put on the new software and check the day after if the car had a long crank after standing there over night. In the end the car was in for 2.5 days for this!
However, no long cranks anymore....
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      04-01-2010, 12:06 PM   #13
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Quote:
Originally Posted by Alpina_B3_Lux View Post

You tell me...I wanted to go racing on the Nürburgring this week-end with the GIAC stage 2 flash...

Alpina_B3_Lux
that really is a bummer But I am sure you will enjoy anyhow!!!
Let me know how it was.

Enjoy!!!
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      04-01-2010, 12:18 PM   #14
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the update probably reduces the startup fuel pressure to make due with the poorly designed pump
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      04-01-2010, 12:19 PM   #15
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I went into the dealer the other day and they updated my ecu to the newest BMW software. Afterwards I drove to GIAC to get my flash put back.
This was last Thursday and my car is running fine, but there may be some issues with different ECUs.
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      04-01-2010, 12:22 PM   #16
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My car is also at the dealer today for 2nd Fuel Pump failure. This time SES light actually came on and stayed on for 2 days without going into limp mode and then went off.

I'm hoping they replace the pump cuz this one shut down after only 2500 miles from the last replacement. And really hoping the update doesnt reject
JB3!
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      04-01-2010, 12:56 PM   #17
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oh sh*t, another curveball
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      04-01-2010, 01:06 PM   #18
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Quote:
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i would like to see how it effects the other tuning software, subscribed to find out
Checked with Dinan yesterday and they also said they need 1 - 1.5 weeks to adapt their software to the new BMW download. Also depends on the build date of your car.

Rick
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      04-01-2010, 01:14 PM   #19
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Quote:
Originally Posted by stevetx77 View Post
The software update to fix the long cranks/HPFP is total bull****. How do they expect software to fix a pump that almost always fails a leak down test when someone complains of long cranks or limp modes?
The software updated *does* fix the long crank times. I still had to go back for a new HPFP (misfires, loss of power) but the long crank times did go away with just the software update. They will still replace your HPFP if you get misfire (codes) after the software update.
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      04-01-2010, 01:18 PM   #20
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      04-01-2010, 01:18 PM   #21
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Quote:
Originally Posted by stevetx77 View Post
The software update to fix the long cranks/HPFP is total bull****. How do they expect software to fix a pump that almost always fails a leak down test when someone complains of long cranks or limp modes? If a suspect pump fails a leak down test, the problem is obviously mechanical (hardware) and not software. Also, if a problem is software based, everyone with that version of software would be affected. Not everybody that owns a 335i has had their HPFP replaced.
From what I've been told, the problem had to do with the fact that under some conditions the ECU was not telling the low pressure pump in the fuel tank to provide enough fuel to the HPFP. That resulted in the HPFP trying to pump more fuel than it was being provided with, causing it to become faulty.

This has been several months coming though, I first heard about the software change being tested in June 2009.
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      04-01-2010, 01:39 PM   #22
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Quote:
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I went into the dealer the other day and they updated my ecu to the newest BMW software. Afterwards I drove to GIAC to get my flash put back.
This was last Thursday and my car is running fine, but there may be some issues with different ECUs.
looks like the OP has a '09 car with a MSD81

you have a pre- 03/08 car -- unless you have a new DME (replaced after 03/08 you'd still be on a MSD80 box.

maybe?

that could be the difference -- but im not sure about it ... so its just supposition at this point
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