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!
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You are right in thinking that they are not sure what they are doing.
Their first suspicion were the incorrect reading of gauges/floaters!Tell me something,when you filled up with 5 ltrs,did the gauge mark up?
Do you know what error code displayed in the diagnostics scan?FUEL INJECTION SYSTEM can be a number of things!If you say it was a low pressure issue in the rail,the first thing to be replaced would be your fuel filter and then the rail pressure sensor,which is a common fault on this engine!Only then should you check the rest of the fuel system like the injectors and the pump as the last resort as it is the most expensive.
Did they replace the fuel pressure sensor?
The injectors can easily be checked for resistance with a digimeter and this would eliminate the electrical side of them.Same with the pressure sensor.
Please have the wiring to the injectors checked as this sometimes comes loose due to heat...
This is about all that is Fuel injection related.
Was there anything done to your car just prior to you having this problem?Did you have you car re-mapped,for example?