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#11
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Quote:
You should have error codes for glow plugs though. Mine had error codes for all six of them so I ended up changing the control unit, although I changed the glow plugs at the same.
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BMW X5 3.0d 2004 |
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#12
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Shame you are too far way,otherwise you could contact us Turner race developments south west UK car tuning company Rgds Fernando |
#13
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Did you get any joy finding the problem, I have the exact same issue for the last 2 mornings, temp has been -12.5 and -3.5.
Cranking the engine multiple times before it catches, does yours catch first turn after multiple cranking attempts, mine does. I read the manual and it says that in very cold climates you may need to crank the engine for 40 seconds before it will start but I would assume they mean much colder than -12.5C! I too have no errors on the screen, I used to have a 530D saloon and it never failed to start first turn of the key even in very cold weather. This makes me think the X5 should be the same. Cheers Gordon |
#14
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Hi Gordon.
It sounds like we may both have the same problem. After speaking to a BMW technician it sounds likely that the control unit may be faulty. As Chris says, this is located under the inlet manifold. With the holidays it is difficult getting anyone to look at the car but it seems probable that I will have to replace the control unit and glow plugs. I will keep you up-to-date with developments. Everyone, many thanks for your input! Ian |
#15
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Hi Ian
I wonder if this explains why when mine eventually starts it does so on first turn whereas during prolonged cranking it doesn't seem to get anywhere near starting. Is that the same with yours? I'll get my mechanic to look at it probably on Thursday as I need the X5 tomorrow, assuming I can get it started! Should at least be able to check for power going to the glow plugs which might highlight a problem with the control unit. I'll get him to check the relay as well. I'll post what we find. I do find it very odd that if either the control unit or glow plugs are faulty we don't get an error on the dash. Cheers Gordon |
#16
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Dash shows only most critical errors, so you would need error code reader for common faults. This includes glow plugs and their control unit. In your case I would certainly read the codes since there are plenty of possible reasons for not starting. Could be low fuel pressure or some sensor malfunctioning.
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BMW X5 3.0d 2004 |
#17
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Thanks Chris
I'll perhaps run it into the dealer who sold it to me as BMW approved used as it's within the warranty period and they owe me as they forgot to connect the battery correctly when I bought it and it broke down after 1 day! They were after me to test drive the new GT5 as I have another car to change, I'll ask for that as a courtesy car while they check mine out. Cheers Gordon |
#18
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Today my X5 was hard to start even when warm so I put the car on another scanner (more up-to-date than mine) and low and behold we now have a problem code - it reads "4B90 - rail pressure monitoring on engine start". I am assuming that this relates to the sensor at the end of the injector rail.
Has anyone any advice? Thanks |
#19
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Thats right.Its the fuel pressure sensor on the rail.Quite common failure on early 3.0Ds,surprised that yours is failing.
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#20
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Mine started first turn this morning although the temp is now only -1C.
I had a pressure issue on my X5 when I got it and it turned out that the fuel filter had never been changed and it had done over 20K miles, changed it and the problem has never returned. Worth checking the filter I suppose. |
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