Fuel Injection System Error

[andrewwynn]

That would be a lot easier and cheaper fix than anything fuel related on a diesel.

If you can get 2nd level codes read it will be very helpful. If say you hit a bump it jiggles the ignition switch and kills power momentarily when driving you will usually see the low voltage error on a lot of systems.


Sent from my iPhone using Tapatalk Pro

[andrewwynn]

The idea is momentary blip of power loss. Example: when a cam shaft sensor stops sending the signal the engine computer has no alternative than to cut power to the injectors. It literally doesn't know where the camshaft is within the cycle so can't determine when the fuel should spray or the spark should fire.

If any mission critical component is affected the engine will.shut off to save the engine from self destruct. If the power blip is short enough you won't even notice. The accessories will still run.

Consider: if you turn the key one click back the accessories still run but the engine shuts off and if you turn back to start position nothing happens. Eg engine will not start running again. I don't think it matters if you do it fast enough that momentum carries the engine far enough it would run the computer won't send fuel or spark.

[UPGrayd]

You are right, I guess if the switch is faulty in the "ignition" position, you could still crank it over while the car essentially thinks its just on "accessories" too. A bit of research shows the switch to be a reasonable common issue with similar (albeit not quite identical) symptoms. They are cheap enough to take a gamble on so I might just order one and throw it in while I wait on my friend with his software etc.

[andrewwynn]

People have been known to refurbish as well. My M.O. in such case is to Amazon a part then when I have a new part on hand attempt to refurbish. If the fix works I'm out like $5-6 to return


Sent from my iPhone using Tapatalk Pro

[UPGrayd]

Just a quick update,

While I await the new ignition switch...and wait for my friend with his cable and software, The car has been driven 8-10 times...In this it has experienced 2 rolling stalls, unwilling to start for 2-3 minutes afterwards, and one no start situation.

The first rolling stall, the car had only been running 30 seconds or so, I had just started backing out of my driveway when it shut off, It displayed NO errors or warnings. It took me about a minute of fiddling with the key to get it to start again. It was fine starting and driving for a period of 1.5 hours over 6 or so trips spread over a 9 hour period for the rest of that day.

The second rolling stall was today, the car had been running for about 5 minutes and we were driving at about 60kph, It beeped displaying a familiar "fuel inject. system" error as the engine shut off and we pulled over to the side of the road safely. It took about 3 minutes of playing with the key to get it to start. After getting it to start the fuel inject system error stayed on the display for 15-20 seconds and disappeared. The car then made a 45 minute trip in town, sat and waited while I ate dinner, then started and made the 45 minute trip back home without incident.

Still displays no current, or stored codes with my obd2 scantool.

[wpoll]

Originally Posted by UPGrayd

Still displays no current, or stored codes with my obd2 scantool.

It won't - it will likley only show codes related to emision issues - not BMW-specific engine error codes.

Time for INPA/DIS/PASoft/ISTA or a Foxwell etc.

[UPGrayd]

Originally Posted by wpoll

It won't - it will likley only show codes related to emision issues - not BMW-specific engine error codes.

Time for INPA/DIS/PASoft/ISTA or a Foxwell etc.

Its a shame, it has no problem pulling toyota specific codes in relation to failed cells in hybrid batteries etc ....looks like ill be investing in what I need to read it if my mate cant get a move on with his stuff lol

[wpoll]

Originally Posted by UPGrayd

Its a shame, it has no problem pulling toyota specific codes in relation to failed cells in hybrid batteries etc ....looks like ill be investing in what I need to read it if my mate cant get a move on with his stuff lol

Possibly more a limitation with the specific software rather than the hardware - since it can obviously read *some* codes from BMW.

[andrewwynn]

Funny aside; "mate" men's something quite different in America. What's funny is, the context usually helps determine which meaning (eg American meaning of my romantic partner) but stronger than context is apparently accent because if you hear an Aussie accent it will be quite clear the meaning is non romantic pal.

[UPGrayd]

Update with codes.

So I managed to get some time to cruise over to my friends place and pull all the codes from my X5....It had 8 stored in memory, One that was really of interested to me.

It had 42 12 24, 42 22 24, 42 32 24, 42 42 24, 40 A1 32, 4B 90 31, 45 60 11 and 45 90 11

After clearing them all, I started the car and monitored, after about a minute of idling the first 5 codes returned but the last 3 did not, The car was not misbehaving in any way and was driving fine. I'm guessing the last 3 will return when it stalls next.