Possible HPFP issues on S55

[Agent - ///M]

I am in the process of trying to self diagnose a fuel psi issue that may be leading in the direction of a HPFP Failure.

Has anyone else had the pleasures of this happening on the S55 platform?

I know there has been a horrible reputation in the past with BMW's HPFP, but thought it was fixed with the F8x line up?

To address those who feel they will need to put in their un-welcomed .02 ----
yes the car is under warranty and no I cannot currently take it to the dealer or they will find out I am a secret agent!!! LOL

[hellokitty]

Curious to know as well. Are you running e85? What is your hpfp psi?

[ibimmer954]

I had a HPFP failure in November. Started my F80 and got a "fuel system malfunction" message. But the car drove fine. Took it to the dealer and the tech said the HPFP was not "performing to spec". Took two weeks to get a part into the dealer and they replaced it. I never noticed any issues in driving, but I did lose a track weekend waiting for the part since I didn't trust the pump after the message and the notes from the tech. Car has a little over 25K miles. I have no tunes or engine mods.

[Agent - ///M]

Originally Posted by hellokitty

Curious to know as well. Are you running e85? What is your hpfp psi?

Not sure how to check it....

I'm getting what seems to be forced misfires codes. There is a constant reoccurrence of fuel rail pressure too low before ignition.

[Agent - ///M]

Here's what I'm left with

[Agent - ///M]

Originally Posted by ibimmer346

I had a HPFP failure in November. Started my F80 and got a "fuel system malfunction" message. But the car drove fine. Took it to the dealer and the tech said the HPFP was not "performing to spec". Took two weeks to get a part into the dealer and they replaced it. I never noticed any issues in driving, but I did lose a track weekend waiting for the part since I didn't trust the pump after the message and the notes from the tech. Car has a little over 25K miles. I have no tunes or engine mods.

Unfortunately I'm not getting any fuel system messages

[aboulfad]

Since you have ISTA, what does calculate test plan provide in terms of ABL to run, it's probably a big list. You can also check using "ecu control functions" the diagnostic tab to trigger various components and /or read various stats.

[Agent - ///M]

Originally Posted by aboulfad

Since you have ISTA, what does calculate test plan provide in terms of ABL to run, it's probably a big list. You can also check using "ecu control functions" the diagnostic tab to trigger various components and /or read various stats.

It leads me to replace the fuel rail pressure sensor, then the hpfp's.

I already replaced the frps with no luck!

That's why she's about to be off to the dealer....

What's puzzling is the misfires, why would the DME force misfires because of too low fuel psi?

At this point I also have raw fuel at both outer exhaust tips.

[aboulfad]

Funny I just learned bcoz of the other thread about the quantity control valve, which I think is connected to the HPFP, did u check that too? http://f80.bimmerpost.com/forums/sho...13&postcount=6

[Agent - ///M]

Originally Posted by aboulfad

Funny I just learned bcoz of the other thread about the quantity control valve, which I think is connected to the HPFP, did u check that too? http://f80.bimmerpost.com/forums/sho...13&postcount=6

Ya I actually read that earlier. None of the faults have ever mentioned that.

It's super weird..... I should hopefully be getting it to a point to take it in to the dealer.

I will certainly update as this unfolds.

[ibimmer954]

Originally Posted by Agent - ///M

Unfortunately I'm not getting any fuel system messages

Just to clarify... In my case I got the "Fuel system malfunction" message on the iDrive as soon as the car started. And the associated yellow icons on the dash. Once I drove the car about two blocks, all the messages turned off and the iDrive status screen was all green again.

You never got any kind of message on the iDrive or lights on the dash? Is the tune messing with your computer or something?

[Agent - ///M]

Originally Posted by ibimmer346

Just to clarify... In my case I got the "Fuel system malfunction" message on the iDrive as soon as the car started. And the associated yellow icons on the dash. Once I drove the car about two blocks, all the messages turned off and the iDrive status screen was all green again.

You never got any kind of message on the iDrive or lights on the dash? Is the tune messing with your computer or something?

Only indicator lights is drivetrain malfunction & cel steady, flashing, & at times just The dmal light with no cel.

As for tune, the don't think so. About two weeks leading up to this I was feeling a lumpy idle. I think it was a warning sign.

[M3C_Thanos]

Originally Posted by Agent - ///M

Only indicator lights is drivetrain malfunction & cel steady, flashing, & at times just The dmal light with no cel.

As for tune, the don't think so. About two weeks leading up to this I was feeling a lumpy idle. I think it was a warning sign.

Did you ever figure this out? I have just about the same problem you are showing.

[Dranthonyrega]

To resurface this I am having the same problem. Any solutions

[hellokitty]

Originally Posted by Dranthonyrega

To resurface this I am having the same problem. Any solutions

Are you tuned?

[Dranthonyrega]

Nope completely stock drive train. It’s a track car. Plugs injector and coils changed. Only happens at full load on the car

[hellokitty]

Originally Posted by Dranthonyrega

Nope completely stock drive train. It’s a track car. Plugs injector and coils changed. Only happens at full load on the car

How many miles on the HPFP?

Might want to try this (based on Bend Calibrations HPFP/injector maintenance guide):

https://www.hotshotsecret.com/gasoline-extreme-12-oz/

[Dranthonyrega]

77k