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Question edited for clarity and the right version of 'witch' (lady in a pointed hat with a broomstick) and 'which'. :>D
Question moved to model category.
That is a bargain, despite it not working!
If you put a new fuel pump in, you disconnect the battery. After that you have to reset the security system and more importantly, the engine immobilizer.
There are very few reasons to ever change the ECM (main computer), and if you do it needs to be programmed to that vehicle with VIN Number and Mileage. After that you have to reset the security system and more importantly, the engine immobilizer. Are you seeing a theme here :>)
I cant thin of a good reason to perform a "fuel pump reset" if there were such a thing?
Understand, the fuel pump is simply a tiny motor in the fuel tank that pushes gasoline out for the engine to use. It has no memory, no settings, or adjustments (for the most part, some newer ones do regulate w a duty cycle, but the pump is still a simple motor).
If you are having problems with starting or acceleration and it may be fuel related, the best thing you can do is get it scanned and or tested mechanically by a technician with access to an enhanced BMW scantool.
As to the fuel pump reset, there really isnt such a thing...fuel pump;s always work with the kjey and engine rpm UNLESS something breaks, or the alarm/theft system disables fuel. Thjere are no fault codes that turn off the fuel pump on your vehicle, so no memory to erase to ruen it back on or change its operation.
No it won't. do a reset for the alarm. turn the key on for ten minutes, off for thirty seconds. Try to start. There is a relearn also, it is three times this procedure. Don't try to start it until after all times are expired or you will have to start over. This doesn't mean that the pump isn't bad. It will just turn the security light off and send voltage to the pump and injectors. But if it fixes your problem. Look for another mechanic.
How did you test the fuel pump?
Which one Distribution Pump or Transfer Pump?
Do you have fuel presuure at the rail?
Do you have a crank signal or spark?
You need to reset the alarm system.That can be done with the remote entry key fob or by locking then unlocking the drivers door with the ignition key with all doors closed.This is for a factory alarm system.Also check the inertia switch,should be in the trunk,on the side with a push button top.Push button.If already down its not tripped.
Search for a way to reset the alarm. Also take the fuel lines off the engine and test the fuel pressure. You want to eliminate the fuel pump not working. If it has a reset button for the fuel pump try that. I would start at the fuel pump and worlk my way up.
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