E53 Diesel rail pressure

[MechManiac]

Hey guys first post here, thank you for the wealth of information you all have posted here! Anyhow, one day, i used the kickdown on my X, and "FUEL INJECT SYSTEM" appeared on my dash. It came off after a few days, but any time it comes off and I kickdown or do medium/slightly heavy acceleration, it will come back on! Technician said it was all 6 glow plugs and "4560 - Rail pressure plausibility delivery control".
Anyhow, I went with changing the glow plugs first. The message had disappeared by then, and never appeared for nearly a week of happy fast driving. Unfortunately it's on now and annoying me. NO hard start, no smoke, no noise, no loss of power.

Any suggestions?

What's a decent scan tool to use? I was looking at the Launch Tech USA creader vi or Equus Innova 3130. ....(something less than 250 USD that will read live data)

Any help would be greatly appreciated. Thank you!

[MechManiac]

diesel doesn't bite, come on, lemme hear some seasoned advice please!

[powers1]

A good Scantool for less than usd 100.00,is the autel MS509 ,which records and prints live data.I used it all the time and have also recommended it to some members here ,who have found it very useful in detecting some engine issues,like Rail pressure,Boost,MAF etc....

Your "fuel inj system " error message can be a number of things related to the fuel system,so it will be a process of elimination!A scantool or performing diagnostics ,will shorten the list ,and will make it easier to find the problem,which can be from the something simple,like your fuel pressure sensor(quite common),injectors, or at worst ,your fuel pumps.

The fact that you say that the error comes up after you drive it hard,could be an computer error,such as too much fuel request at higher revs.This is also common on remapped cars that havent been done properly!Has yours been remapped?

You say you changed the 6 glow plugs!This hasnt nothing to do with Fuel inject error message!Was your car difficult to start before they replaced these?

[MechManiac]

Originally Posted by powers1

A good Scantool for less than usd 100.00,is the autel MS509 ,which records and prints live data.I used it all the time and have also recommended it to some members here ,who have found it very useful in detecting some engine issues,like Rail pressure,Boost,MAF etc....

Your "fuel inj system " error message can be a number of things related to the fuel system,so it will be a process of elimination!A scantool or performing diagnostics ,will shorten the list ,and will make it easier to find the problem,which can be from the something simple,like your fuel pressure sensor(quite common),injectors, or at worst ,your fuel pumps.

The fact that you say that the error comes up after you drive it hard,could be an computer error,such as too much fuel request at higher revs.This is also common on remapped cars that havent been done properly!Has yours been remapped?

You say you changed the 6 glow plugs!This hasnt nothing to do with Fuel inject error message!Was your car difficult to start before they replaced these?

Thanks for the info on the scan tool.It's cheaper than the others I was looking at! The initial scan by the tech brought up glow plugs too, so i changed that first, by myself (thereby eliminating it as a possibility) even though I knew they are only used for cold weather starting when the diesel fuel mixture doesn't hit the temperature to spontaneously ignite during compression. There were no hard start issues then or now. I'm leaning towards the sensor replacement but I don't want to shoot in the dark with BMW's again. I haven't re-mapped the computer either. Thank you for the timely response!

[powers1]

Originally Posted by MechManiac

Thanks for the info on the scan tool.It's cheaper than the others I was looking at! The initial scan by the tech brought up glow plugs too, so i changed that first, by myself (thereby eliminating it as a possibility) even though I knew they are only used for cold weather starting when the diesel fuel mixture doesn't hit the temperature to spontaneously ignite during compression. There were no hard start issues then or now. I'm leaning towards the sensor replacement but I don't want to shoot in the dark with BMW's again. I haven't re-mapped the computer either. Thank you for the timely response!

Can you keep us updated please,as there is another member here with the exact same issues.

[MechManiac]

No problem... My update so far....waiting on my scan tool to ship from the USA to Trinidad, West Indies (google it). Car is fine still, except for the message on the dash, and the annoying ding ding noises upon entry/exit.

[MechManiac]

Update, no scan tool, but I changed the diesel filter and the warning message came off 500 kilometers afterwards. The message was stubbornly on since the first post.

[powers1]

Weird!One explanation of being the fuel filter setting off the error light,would have been if the sensor plug on the filter wasnt properly "clicked in" before you changed the filter..
I hope the error light stays off..and thanks for the update

[MechManiac]

Sorry to bring back an old thread. At 151,000 KMs the problem returned with the same codes except only cyl 1,2,3 plugs were bad.
I changed only the fuel filter this time and all is well.

go figure, my car tells me when to change my fuel filter