2002 M57 30d cant start

E53/30d · #1 08-31-2018, 04:43 AM

Please help my E53 30d i doesnt want to start it only start when i use engine start and it can idle for hours after that, the other thing if i press accelerator hard while driving it cuts off, its got rough idle when driving.

its got two fault codes:
(09F6) Rail pressure monitor on engine start.
1250 Relay pre supply pump (the problem with my relay it doesnt work if i install it normally.. its need to be directed the you can feel the fuel pump working..(i have directed for earth on port (86))

My glow plug module(timer) also doesnt supply power to glow plugs but (but my glow fuse on computer box and main red wire do supply power to it)
(i have three different timer modules and they all doing the same thing no power output)

Things i have have done so far:
Sent ECU to (ECU auto) for a check ..they said its fine:

1. Change fuel rail sensor.
2.Bought fuel sender unit/pump on the tank(its new)
3. Pre suppy pump next to tank (underneath) its also new.
4. Glow plugs all six have been changed.(New)
5. Crank sensor its also (new).
6. Cam shaft sensor has been changed as well.(swapped with a driving car still no start)

Please help i have no clue what else to look for now.
could it be injector leaks?
or my ECU is dead?

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williamx5 · #2 09-03-2018, 10:18 PM

Good day!

There are only two things that keep an engine from running (petrol)... Fuel and spark...

There is only one thing keeping an engine from running (diesel)... Fuel... At least that is what I have heard.....

Test... turn the key on and off a few times before trying to start it to see if it is a fuel priming issue... The starting with fluid keys into the idea you have a lack of fuel pressure... Taxing that low fuel pressure by pressing the accelerator to the floor also points to low fuel pressure... You have pressure, but not enough initially to start it NOR enough to go full throttle when driving... Check the fuel pumps or fuel pump controls... Relays, connectors, pumps, grounds, or EWS...

Cheers and good luck!!

E53/30d · #3 09-04-2018, 03:07 AM

Thank you, for your Response WilliamX5, This week i will be checking injector fuel leak back and what will find there.

wpoll · #4 09-04-2018, 04:04 AM

Here's some trouble shooting info. that might help...

https://www.newtis.info/tisv2/a/en/e...e-line/BjiHr8v

E53/30d · #5 09-04-2018, 06:01 AM

thank you so much, i did not know each injector has a specific cylinder, and i also bought this car four months ago, i don't even know what those numbers mean, kindly help if possible, or if i can easily tell which number belongs to which cylinder.

Thank you once again for the info.

wpoll · #6 09-04-2018, 06:40 AM

Quote:

Originally Posted by E53/30d

thank you so much, i did not know each injector has a specific cylinder, and i also bought this car four months ago, i don't even know what those numbers mean, kindly help if possible, or if i can easily tell which number belongs to which cylinder.

Thank you once again for the info.

Unless you have removed the injectors and then mixed them up, don't worry about the injector numbers - they should still be in the correct location and the DDE programmed correctly.

It is possible that you have an injector issue but the codes don't point to this - they seem to indicate an issue with fuel pressure.

Remember, rail fuel pressure on these CRDI engines is not provided by the electrical pumps but rather by a mechanical pump, which puts out up to 26,000psi to the rail.

Proper diagnosis of rail pressure problems require some pretty special tools but there is some info on the rail pressure systems here: -

https://www.newtis.info/tisv2/a/en/e...m-test/Xi4Rree

This may only apply to the LCI cars (post 09/2003) with DDE5.0 - not sure if it applies to earlier cars (DDE4.0 etc.)

wpoll · #7 09-04-2018, 07:13 AM

Update to my comments above - just been reading about this exact issue on other forums and in at least one other case (with that exact 1250 code) it WAS faulty injectors. Turn out that leaking injectors cause the rail pressure to drop (not surprising really).

Seems to indicate multiple failed injectors, rather than a single failure.

BTW, leaking injectors don't mean that fuel can be found sitting in pools at the top of the engine exterior (like a few folk appear to think, from some of the comments I read) - the term "leaking injector" refers to an injector that still passes fuel even when closed off by the DDE/DME - in effect it is no longer an injector but a constant flow nozzle, spraying fuel all the time.

E53/30d · #8 09-04-2018, 08:20 AM

Thank you so much guys, the only things left for me to think about now, it those injectors and HPFP (High Pressure Fuel Pump) which include fuel pressure regulating valve (of which i have also read other comments as well that are not BMW related for the diesel car that are shutting down while driving) and the problem was a faulty injector.

i hope this link opens, (pity i cant tell what these guys are saying but i could see what they do)

https://www.youtube.com/watch?v=r9jo4uH8S8o&t=524s

(Kia Seronto with fault code P1181) this is what my car is doing.

https://www.youtube.com/watch?v=bzlCDkkeD0U

I shall give a feed back as soon as i come right.

E53/30d · #9 09-13-2018, 05:34 AM

Quick feed back guys.

I had four injectors leaking back to return pipe..three of them fill up 500ml bottle in 1 minute.

Just after i changed those injectors, after priming my rig..my car started like never before with hassles. So far soooooo gooood!!!!

wpoll · #10 09-14-2018, 01:55 AM

Quote:

Originally Posted by E53/30d

Quick feed back guys.

I had four injectors leaking back to return pipe..three of them fill up 500ml bottle in 1 minute.

Just after i changed those injectors, after priming my rig..my car started like never before with hassles. So far soooooo gooood!!!!

Thanks for the update.

Boy, four leaking injectors - that's bad luck (or a load of crappy fuel at some point...).

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