Hope you can help guys, having some problems with my BMW 320d E90, high miler on 150,000.
Been a while now where i have been experiencing limp mode upon aggressive acceleration (would kick in around 2 and a half to 3000 revs) at which point i would get a half lit engine management light and "Engine Fault, reduced power" message on iDrive. I did have fault codes read and found that i had some faulty glow plugs and then a rail pressure code also came up. Glow plugs where done immediately but i was told the rail pressure could be down to many things. That was about a month ago and i carried on driving the car after and just avoided aggressive acceleration to avoid the warning light which would always clear upon restart.
So, just last week car broke down on me with just under quarter tank of diesel. Called RAC out who read fault codes to find rail pressure fault was there once more. Had it towed to same garage that done glow plugs and 2 days later he came back to me with following report: All diesel that needle was showing me (just less than quarter tank) was in the left tank and the right tank was empty and that was the reason for the break down, moving the fuel form left to right allowed the car to start. I was told this particular issue was down to in tank fuel pump but this issue was not necessarily linked to the rail pressure issue causing limp mode. To test this i was advised to fill the tank up and check if issue still exists as this would take the in tank fuel pump out of the equation. Done the test and engine fault returned with car going into limp mode even with full tank of diesel. Now at this point i have been advised that my issue could be any number of things, including high pressure fuel pump or injector issue which is in addition to the in tank fuel pump that is definitely faulty. I have been told that the fault code being read does suggest it is not turbo itself.
Before getting anything else done just wated to jump on here to get some advice and see if anyone had been through anything similar...