Official 3.0 Diesel Engine Issues & Comments Thread - Page 16

rrgroup · #**151** 08-08-2010, 08:45 PM

thanks for promptly replying and i will try to answer your questions to the best of my understanding of the diagnostics. yeah, gauge went up when i filled it with 5 ltrs. error i believe was the rail pressure as you have mentioned. they also said that when they checked the "other fuel tank" it was empty. they said something like transfer of fuel. the 2nd time i brought it to them when it didn't start, according to them, all other components were fine like gauge, floater, fuel filters, injectors and i'm assuming they passed the GT1 test. they haven't replaced any sensors. nothing was done to the vehicle prior to all of this. i will suggest to them your opinions. i will appreciate if you have more inputs. thanks again.

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rrgroup · #**152** 08-08-2010, 09:25 PM

i just got off the phone with the mechanic and accdg to him the primary fuel pump really needs to be replaced. there's power in it but motor wont run. he said to check the fuel filter, high pressure pump, rail pressure and injectors is quite irrelevant since circulation starts from the primary pump, though they are all fine including the sensors as per him. but the thing is, after replacing the pump and it still acts up, they'd need to diagnose the other said components. is this correct in you opinion?

blueagle · #**153** 08-09-2010, 05:28 AM

rrgroup,

Good to hear a fellow member from the Philippines. Are you a member of any BMW car club in the Philippines ? There are several guys from the Philippines who also own X5 3.0d diesel trucks who are members of this forum..

Which BMW stealership did you go to ?

powers1 · #**154** 08-09-2010, 12:31 PM

Quote:

Originally Posted by rrgroup

i just got off the phone with the mechanic and accdg to him the primary fuel pump really needs to be replaced. there's power in it but motor wont run. he said to check the fuel filter, high pressure pump, rail pressure and injectors is quite irrelevant since circulation starts from the primary pump, though they are all fine including the sensors as per him. but the thing is, after replacing the pump and it still acts up, they'd need to diagnose the other said components. is this correct in you opinion?

Well if they are sure the pump has power but wont turn,then its faulty and MUST be replaced!This is the right thing to do.
Only after the pump is working 100% will it provide the necessary flow of fuel to injectors ,so they are right also to say that these have to be checked.Without the pump ,they will not be able to check the rest of the fuel system after the pump.
What they are really saying is that they are not sure if the rest is ok.
I am sorry but after what you said ,they dont seem very trustworthy,especially as they also told you the fault could be a bad gauge reading and you run out of petrol,yet when you filled up with 5 ltrs,the gauge went up...
Also ,its weird why they would say you need to run the car with over 1/4 tank full....

You just need to be sure that they are telling you the truth about the pump being faulty!Go there and identify the pump and mark it if you can and then demand they give you the old pump.

Good luck but be weary,ok

rrgroup · #**155** 08-09-2010, 01:15 PM

Quote:

Originally Posted by blueagle

rrgroup,

Good to hear a fellow member from the Philippines. Are you a member of any BMW car club in the Philippines ? There are several guys from the Philippines who also own X5 3.0d diesel trucks who are members of this forum..

Which BMW stealership did you go to ?

Hi there buddy. Good to see you here too kabayan. No i'm not a member of any bmw club. I dont think i can squeeze it in my already hectic sked. Anyway, there's such a forum. Got to impress a lot of people including my wife with the DIY tips.

rrgroup · #**156** 08-09-2010, 01:27 PM

Quote:

Originally Posted by powers1

Well if they are sure the pump has power but wont turn,then its faulty and MUST be replaced!This is the right thing to do.
Only after the pump is working 100% will it provide the necessary flow of fuel to injectors ,so they are right also to say that these have to be checked.Without the pump ,they will not be able to check the rest of the fuel system after the pump.
What they are really saying is that they are not sure if the rest is ok.
I am sorry but after what you said ,they dont seem very trustworthy,especially as they also told you the fault could be a bad gauge reading and you run out of petrol,yet when you filled up with 5 ltrs,the gauge went up...
Also ,its weird why they would say you need to run the car with over 1/4 tank full....

You just need to be sure that they are telling you the truth about the pump being faulty!Go there and identify the pump and mark it if you can and then demand they give you the old pump.

Good luck but be weary,ok

I really appreciate the inputs and it made me understand more. So as not to put the dealership in a bad light, i believe the mechanics are trustworthy enough. I just dont know if they're diligent and persevering enough to really scrutinize. But as you said, they're on track.

Thank you and more power!

blueagle · #**157** 10-17-2010, 07:14 AM

Quote:

Originally Posted by rrgroup

hi guys! i have a '03 3.0 diesel and i'm very happy with it until about a month ago. night time, while on my way to the city travelling at around 60mph, i heard a BEEP and computer showed FUEL INJECTION SYSTEM followed by the engine stalling. fuel gauge level was a little above a quarter tank. as per advice of BMW mechanics, i added some 5 liters of diesel but it still wouldn't start. on monday, computer diagnostics showed that it wasnt getting enough pressure from something in the fuel system. they checked everything and after 2 days, they told me that air probably went inside the fuel pump or something and that caused the stall. they released it to me and asked me to keep observing it especially when fuel level hits below half coz they're thinking that gauge or floaters might also be the culprits. i've had it 4 times almost empty tank and had no problem until 6 days ago. it cranks but just wouldnt start. now they tell me that its absolutely the primary fuel pump that needs to be replaced (part# 16126756157). it's a bit disappointing coz i feel they're not really sure. it's quite expensive so i would just like to hear any comments from you guys before i have it done. thank you and more BMW power!

Which stealership did you bring your X5 for repair ?

W

omodos · #**158** 10-18-2010, 01:46 AM

this air in the system thing i thought could not happen to the newer technology cars?as of yet have not had fuel pump issues....so cant comment unfortunately...have got camber issues and cannot get rid of them but that is another story

blueagle · #**159** 02-20-2011, 09:06 AM

How often do you guys change oil in your diesel X5 ? What type of diesel oil do you use ? fully or semi synthetic ?

X5Sport · #**160** 02-20-2011, 03:55 PM

Diesel systems are 'self-bleeding' and air in the system will be removed from the fuel system by normal use. There is another check before replacing the pump, and that is to ensure that e fuel pump relay is OK. The relay is above the glovebox and is the one nearest the firewall.

Relay in position 1 in the attached. As it's only $14 US, it's worth a try.

RealOEM.com * BMW E53 X5 3.0d Relay positioning, behind glove box

Mine went three months ago and the pump would not run.

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