[gT-BMW]

sup yall got another n52 almost left me stranded story id like to share. well some might say it did lol I got a 2006 bmw 325i 6speed manual with 186k miles.

So i was at a drive thru and out of no where no warning, my car just shuts off and there is this electrical smell. It would crank over but no start. Luckily for me it broke down close to my house like 10 min so i thought so it was real late in the night, pushed the car to the side and walked home. It ended up becoming a 30 min walk and by the time i got home i was tired, sweaty, feet achy and scare. It was so dark i thought i was going to step on shit or on a snake or something and i kept hearing creatures around me. i never doing that again im calling a cab lol

So the next day i returned and noticed i didnt hear the fuel pump prime. I got my first clue. I check the schrader valve on the fuel rail and sure enough there was no fuel there. I checked the f35 fuel pump fuse and it was blown, replaced it with another one and that too blows on contact even with the car off no key.

Thinking damn the day has finally come that i have to call a tow truck on my car.

Im thinking fuel pump took a shit so i use my power probe to power on the FP and it powered on! So i hard wire the fuel pump, the car fired right up and i drove it home!!

Made it home and began looking for the fuel pump relay and found our cars dont have one our fuel pumps are variable speed and its controlled by a ekpm2 module.

for those wanting to know where it is, ekpm2 module is located behind the passenger side rear seat you have to remove the rear seat to access it, it was real easy.

I find my module is toasted and i need another one. Can i replace this one with another used one? do i have to do any coding? Has this happened to anyone if so how did you fix it? thanks!!

[lookalikehuuh]

So you could replace it with a used EKPM2 or EKPM3 module without any real issues. It is better to "code" it so the EKPM2 knows about the proper power/flow rates for your specific vehicle but not required by any means.

I wonder if your fuel pump is somehow pulling more power than normal which caused your EKPM to burn up or you just had a defective unit.

Some of us that have Stage2+ fuel pumps on our N54/N55 have started doing extra cooling on our EKPM modules by installing a fan and some heatsinks internally as well as some computer CPU thermal paste on the bottom side that touches the vehicle mount to help dissipate heat. . Not saying you need that but probably not a terrible idea.

Extra cooling for reference:
https://www.e90post.com/forums/showthread.php?t=1737938

[gT-BMW]

Wow I had no idea the n54 guy go so hard on that thing. Is it possible to bypass the ekpm module by hard wire fuel pump to 70amp relay kit??

If so I might consider that an option because i got another used ekpm2 module from the junker and now it no longer pops fuses but it starts up and dies.

Does this mean I have to code this thing? If so how do i do it? can anybody help me with coding?? thanks!!

Originally Posted by lookalikehuuh

So you could replace it with a used EKPM2 or EKPM3 module without any real issues. It is better to "code" it so the EKPM2 knows about the proper power/flow rates for your specific vehicle but not required by any means.

I wonder if your fuel pump is somehow pulling more power than normal which caused your EKPM to burn up or you just had a defective unit.

Some of us that have Stage2+ fuel pumps on our N54/N55 have started doing extra cooling on our EKPM modules by installing a fan and some heatsinks internally as well as some computer CPU thermal paste on the bottom side that touches the vehicle mount to help dissipate heat. . Not saying you need that but probably not a terrible idea.

Extra cooling for reference:
https://www.e90post.com/forums/showthread.php?t=1737938

[F31B48]

Originally Posted by gT-BMW

Wow I had no idea the n54 guy go so hard on that thing. Is it possible to bypass the ekpm module by hard wire fuel pump to 70amp relay kit??

If so I might consider that an option because i got another used ekpm2 module from the junker and now it no longer pops fuses but it starts up and dies.

Does this mean I have to code this thing? If so how do i do it? can anybody help me with coding?? thanks!!

Have you got NCS expert? I can give you a step by step on how to code it if you do.

[gT-BMW]

The coding worked!! My car lives again!

Originally Posted by EvaBmw

Have you got NCS expert? I can give you a step by step on how to code it if you do.

yessir, i used this guide http://blog.obdii365.com/2016/08/14/...om-ncs-expert/

Had no idea what it meant just did it and it worked! couldn't believe it, thats what fixed my car. I ran into the vin is faulty error code had no idea why so i used an old ibm laptop with windows xp from like 30 years ago and that was able to do the coding.

Thanks for the help!! I hope this helps somebody!

[ranthum]

Originally Posted by gT-BMW

Wow I had no idea the n54 guy go so hard on that thing. Is it possible to bypass the ekpm module by hard wire fuel pump to 70amp relay kit??

If so I might consider that an option because i got another used ekpm2 module from the junker and now it no longer pops fuses but it starts up and dies.

Does this mean I have to code this thing? If so how do i do it? can anybody help me with coding?? thanks!!

You could install a decent solid state relay after the ekpm with a high enough switching frequency that it would still operate with pwm. But one of those relays is probably more thank a used ekpm.

[nobeamer17]

Originally Posted by lookalikehuuh

So you could replace it with a used EKPM2 or EKPM3 module without any real issues. It is better to "code" it so the EKPM2 knows about the proper power/flow rates for your specific vehicle but not required by any means.

I wonder if your fuel pump is somehow pulling more power than normal which caused your EKPM to burn up or you just had a defective unit.

Some of us that have Stage2+ fuel pumps on our N54/N55 have started doing extra cooling on our EKPM modules by installing a fan and some heatsinks internally as well as some computer CPU thermal paste on the bottom side that touches the vehicle mount to help dissipate heat. . Not saying you need that but probably not a terrible idea.

Extra cooling for reference:
https://www.e90post.com/forums/showthread.php?t=1737938

Hey I have an ekpm3 that's been having me stranded a few times so far for a few minutes. I'm aware that they can be hot and cause issues. I've checked voltage fuel pump and even the voltage for that too. No codes. No dash lights until it stalls and turns off after a long drive and especially if it's hot out. I have a used ekpm2 from an o7 535! Am I able to plug and play with no coding or how does this work?

[nobeamer17]

Update I just plugged in the ekpm2 and have been driving it so far and so far I don't have the the shutting off while driving that I had before especially when I'm hitting it or flooring it. Still no lights and no signs but runs amazing!!! BTW I have a 2008 bmw 535xi

[3PedalJake]

Originally Posted by nobeamer17

Update I just plugged in the ekpm2 and have been driving it so far and so far I don't have the the shutting off while driving that I had before especially when I'm hitting it or flooring it. Still no lights and no signs but runs amazing!!! BTW I have a 2008 bmw 535xi

Good deal! I'm holding mine from my '06 325i right now, burnt up just like the one in the OP pic. Waiting on one from fleabay if the USPS ever gets done routing it all over the country, hoping for a quick plug and go like yours.

[oVeRdOsE.]

I ran a N52 ekpm3 for months on my 335 ST before someone told me wasn't the same... I had 0 issues.
Changed it anyway and open both, and they seems identical physically (does not mean the way it works is the same tho).

So might be a spare option for you guys.

Anyway, did the passive and active cooling mod using spare PC parts, to make sure it holds the 450.

[nobeamer17]

Update x2 have been driving it this entire time so far and so far nothing 😆 I've been driving frequently and running speed up to 60mph and still nothing.

[oVeRdOsE.]

Originally Posted by nobeamer17

Update x2 have been driving it this entire time so far and so far nothing 😆 I've been driving frequently and running speed up to 60mph and still nothing.

have you thermal paste or add some passive cooling to avoid the same issue on long run ?

[nobeamer17]

No I haven't used any thermal paste

[nobeamer17]

Update x3 I've literally drove the car all day and night yesterday constantly turning it on, letting it idle, the usual car usage and nothing! Drive great and strong and I had it on the highways doing speeds up to 80-90mph still not turning off in the middle of driving, or when it's hot, like it used to do

[lowrydr310]

Originally Posted by oVeRdOsE.

I ran a N52 ekpm3 for months on my 335 ST before someone told me wasn't the same... I had 0 issues.
Changed it anyway and open both, and they seems identical physically (does not mean the way it works is the same tho).

So might be a spare option for you guys.

Anyway, did the passive and active cooling mod using spare PC parts, to make sure it holds the 450.

I installed a EKPM3 in my 335i, sourced from a LCI 328i. You sure they're not the same? I remember looking up part numbers on realoem to confirm they're the same. I did a default coding for the 335 when I installed it, no issues, it's been running great.

I do wish I had made the active cooling modifications, since it's a pain to access on the E93. Lots of stuff to remove.

I only replaced it hoping to resolve an occasional 2AAF shadow code but, but even after replacing with the EKPM3 I still get that code.

[oVeRdOsE.]

Originally Posted by lowrydr310

I installed a EKPM3 in my 335i, sourced from a LCI 328i. You sure they're not the same? I remember looking up part numbers on realoem to confirm they're the same. I did a default coding for the 335 when I installed it, no issues, it's been running great.

I do wish I had made the active cooling modifications, since it's a pain to access on the E93. Lots of stuff to remove.

I only replaced it hoping to resolve an occasional 2AAF shadow code but, but even after replacing with the EKPM3 I still get that code.

like I said, I read a single comment about this.

And from what I can see, they are the same.

However, I had a 335 laying around, so I use it to complete the cooling mod and then I changed it. Also my 335 had twice less mileage.

Ill keep the n52 as a spare.

[Aligat0]

Originally Posted by lowrydr310

I installed a EKPM3 in my 335i, sourced from a LCI 328i. You sure they're not the same? I remember looking up part numbers on realoem to confirm they're the same. I did a default coding for the 335 when I installed it, no issues, it's been running great.

I do wish I had made the active cooling modifications, since it's a pain to access on the E93. Lots of stuff to remove.

I only replaced it hoping to resolve an occasional 2AAF shadow code but, but even after replacing with the EKPM3 I still get that code.

Hi, i've got the same stupid 2AAF code that i sorted it out.

The first thing I checked and replaced was the LP sensor, followed by the LPFP and the fuel filter, but the error persisted. After that, I moved on to inspect the EKP. When checking the EKP with INPA, make sure to monitor the PWM status. Upon starting the car, the PWM drops from 100% to around 50-60%. While idling and letting the engine warm up, I gently pressed the accelerator pedal. I noticed the PWM went back up to 100% and remained there. However, after restarting the engine, the PWM returned to 50-60%.

Solution: Reset the fuel pump adaptations using INPA.
Issue resolved.