Hi guys,

I bought 2009 R56 this June. It worked fine until I drove it up to school, (TX to MI) Found some problems with thermostat housing and turbo oil feed line so I replaced that. I think the car was well maintained from the previous owner according to the carfax.

So recently my car failed to start the engine all of sudden and I found some post on this forum about high pressure fuel pump failure.
I would say the symptoms were similar..(?)
My car was working fine just as usual but all of sudden it would not start, tried jumping the car twice but even before the lights, stereo, windows and etc were working fine. When I tried starting the car ignition sounds were made but it continued without starting the engine until I turned it off.

So last Friday I towed my car to the dealership and they contacted me today saying that it has problem with high pressure fuel pump which will be cover by the extended warranty. Few hours later they called me again saying it was actually low pressure fuel pump failure and it is no longer covered by the warranty.

I tried to look for low pressure fuel pump failure on the web but I can't find anything about. I'm not even sure why it cost $600 and not covered by the warranty when high pressure fuel pump is covered.

What is the difference between low pressure fuel pump and high pressure fuel pump? And are they totally different parts? Just little sketchy about how they told me it was HPFP but now it's LPFP....

Help me out guys

 

Welcome to NAM.

They're talking about the pump inside the gas tank, the HPFP is well provides very high fuel pressures. If either pump isn't operating at their optimal fuel pressure the whole train comes to a stop, does the $600 include parts and labor? You might as well replace the fuel filter if your going to replace the in tank gas pump, there usually replaced at 100,000 miles.

I believe every member here on NAM has had the thermostat housing and turbo oil feed line replaced, these are known issues. Have had your timing chain and timing chain tensioner replaced? Just know to check your oil every other gas up, these Prince engines burn a lot of oil.

 

thank you! the $600 includes all those I think.
Yeah I saw lots of turbo oil feed lines and thermo housing issues on here lol I guess it would've been better if those happened to previous owner before I bought it if I look only from my perspective. Thanks for the tips I will check on those as well.

So after reading yours, I understand what HPFP is but they told me that I'm having problems with LPFP. Do you know if those are different?

 

Yes they are different. The LPFP is in the fuel tank feeding fuel forward toward the engine bay. The HPFP is in the engine bay that feeds fuel at a higher pressure to the injectors for proper direct injection atomization.

 

ahhh I see! Thanks for the info! Hopefully after this my mini won't have any problems. I really enjoy driving my car and not having it sucks

 

My guess is they would replace the HPFP under "extended" warranty because it is a known defect in the car. I had mine replaced it was the only thing that ever went wrong with my 2007 MCS. I don't remember reading anyone with a LPFP failure so that's probably why they won't cover it.

 

If you do ever have a problem with the HPFP and are out of warranty you might try replacing it yourself as it very easy, you can buy the HPFP for next to nothing and we have a DIY thread that walks you through the entire procedure. My HPFP hasn't gone bad yet (54k), I expect it to at some point. Just don't want it to leave me stranded, I could just replace it myself now.

DIY HPFP thread

HPFP

 

Thanks systemlord for the mention. That DIY is great for people out of warranty. Noted that for the N14 Turbo engines Mfg Part#13517588879 . Linked above^^ "HPFP" &
"DIY HPFP thread"

The N18+ turbo engines being that most are under warranty are 13517592429. Looks close to the N14 design but are different parts.

N18 turbo motors up to 3/2012: 13517592429

http://www.ecstuning.com/Search/SiteSearch/13517592429/




Then they went to the N18 turbo engines 3/2012+ a total different design. 13517630644


http://www.ecstuning.com/Search/SiteSearch/13517630644/



Thanks and hope that helps other of newer MINIs.

 

That second pump looks like the ones I've seen before on 2013 MCS, I take it doesn't run off the intake cam. Strange looking.

 

Yep 13517630644 is a two piece design 3/2012+ N18.

#8 is the housing to the cam.




#1 is 13517630644 ( linked above ) and just the HPFP.



Thanks

 

To bad the newer HPFP pump wasn't designed to be backward compatible with all R56 MCS's.

 

Last year I had the HPFP replaced (warrantee recall) on my 09 R55 Clubman. In early Sep we saw temps in the mid 90's and after a quick down poor I lost power and rolled to a stop in the rain. No error lights. I did a quick gas cap check (maybe vapor lock) and it started right up. Two weeks later, while coming into a stop light it died again but while rolling to a stop I popped the clutch and off we went. One week later at 70mph on the freeway it stopped running like it ran out of gas. Tried to start for an hour waiting on tow truck. Two days later when my local BMW/Mini mechanic opened in the am...it started right up. All that was in the ECU were misfire codes. We threw an expensive dart and replaced the primary fuel pump and I drove it home without a hiccup.

I've always believed that the triangle of fire (Air, Spark & Fuel) were the key items to search for. Air and fuel are now taken care of so spark is the only thing left...right????