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Discussion Starter #1
My car recently started giving me an engine fault when i revved it hard. It would sometimes go into limp mode and shut down once the error came on. Sometimes it would continue driving with reduced power.
When i put it on a computer it showed me the following errors:
Glow Plug, Cylinder 1, 2, 3, 4, 5, 6 Activation (6 errors)
4B10 - Smooth Running Controller
4560 - Rail-Pressure Plausibility Delivery-Controlled

I was first advised to change the common rail which i did not change.

A few days later the car (without any hard revving) went into limp mode and showed me tonnes of errors on the screen (4x4, dbc, dsc, parking sensors etc). It would not restart either immediately and the problem continued for a few hours.

The mechanic has now advised me to change the injection nozzles (6 of them) and if that doesnt work then replace the turbo. Im surprised that none of these come up on the computer error report but require to be replaced.

Also, the car has not been idling smoothly - it is continuously fluctuating.

Do let me know what would be the best solution!
 

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Nuclear engineer
02/2012 X5 35d M57Y CPO 99K miles NOKIAN WR G3 12K miles
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17,477 Posts
Get a different and better qualified mechanic that you can trust.

The GP's are giving errors, not the more expensive injectors. Wildly unrelated errors suggest a failing battery.

A DTC error code does NOT identify a failed part to be changed but a symptom that may be caused by any number of failed components or adjustments to be differentiated among by execution of a BMW Test Plan© guide through the fault tree. Consider that a failed component indication may be caused by a broken wire meters away at the ECU.
 

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Discussion Starter #3
Unfortunately we dont have too many good mechanics here.

The battery is surely working fine because it was recently replaced and does not show any battery discharge error.

The 6 glow plug errors have always been there and have never caused an engine fault and therefore i dont think it will make sense to change the injection nozzles (unless someone can confirm to me that they are interrelated and there is quite a high chance the issue can be fixed). The mechanic also confirmed to me that they removed one of the injection nozzles and tested them and it does have a problem (i do not know how he tested it though).
 

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Nuclear engineer
02/2012 X5 35d M57Y CPO 99K miles NOKIAN WR G3 12K miles
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17,477 Posts
Unfortunately we dont have too many good mechanics here. ... The mechanic also confirmed to me that they removed one of the injection nozzles and tested them and it does have a problem (i do not know how he tested it though).
Our E70 X5d diesel injectors are among the very highest technology consumer products that there are. Piezoelectric injectors are beyond the capability of anyone with the epithet mechanic.

For instance, our piezo-injectors run at 200 volts variable duty cycle square wave DC and inject up to seven times per compression stroke and at just the right time.
 

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Discussion Starter #6
Buying luxury high performance cars and third world countries do not mix well <img src="http://s1.bimmerfest.com/forums/images/smilies/smile3453453.gif" border="0" alt="" title="Smilie" class="inlineimg" />
I learnt the hard way.haha
 

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Unfortunately we dont have too many good mechanics here.

The battery is surely working fine because it was recently replaced and does not show any battery discharge error.

The 6 glow plug errors have always been there and have never caused an engine fault and therefore i dont think it will make sense to change the injection nozzles (unless someone can confirm to me that they are interrelated and there is quite a high chance the issue can be fixed). The mechanic also confirmed to me that they removed one of the injection nozzles and tested them and it does have a problem (i do not know how he tested it though).
So you have had GP problems 'forever'....and now, when a NEW problem crops up, you think this is ONE fault and ONE 'thing' that will fix both?!?! ('interrelated'....)

This is one of the things I see from many posters- ignore issues for years as long as the car moves....but then when the spit hits the fan, there are 5 issues and troubleshooting is a mess.

1. Buy new glow plugs and a controller. Replace them. DO NOT fail to replace the controller.

2. See what errors remain. Likely an injector. But could be a pressure sensor (wag).

3. It is NOT a turbo. (Geez, you get a common rail pressure fault, and the guy wants to replace "the common rail"?!?!?!??! OMG)
 

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4B10 - Smooth Running Controller
4560 - Rail-Pressure Plausibility Delivery-Controlled

I was first advised to change the common rail which i did not change!
Advised to change fuel rail pressure sensor?

Leave the glowplugs out of your driveability diagnosis since first consensus here will be your glow plug module for that issue.
I was not aware that the injectors have serviceable tips...
 
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