3 weeks ago car would stall when shifted in Drive mode. After a couple of retries it would pull away. 500 feet later would stall again when stopping a junction. Put it in reverse and pulled away. Then shifted back to Drive and worked again. Got home, parked car and did not use for rest of day. After that car worked fine until yesterday when it basically stalled again when trying to leave the house. Drove approximately 15 miles (including highway) during which distance it stalled 3 more times trying to pull away after coming to full stops at traffic lights. Car was left parked for 1.5 hours and restarted without any problems. Drove another 20 miles without further stalling.Could it be the fuel filter or the pump or maybe the fuel pressure regulator? Or a lose electrical plug?
Sounds like you have a small bit of dirt or grit in the fuel system when accelerating it is drawn with enough force to cut off the fuel supply then is released when engine at Idle.
1 run liquid fuel line/injector cleaner in 1 tank
2 check fuel lines for debris
3 change fuel filters
4 have fuel tank flushed
here is trouble shooting order less expense to greater.
SOURCE: 325i BMW, 2003 (Automatic) Fuel Pump/Filter or
your camshaft position sensor may be going bad. usually with an old car it tend to go bad. The top of sensor can be covered or gumed up with grease, oil, dirt and cause it not to detect the flywheel turning. Camshaft sensor send single to your DME to deliver fuel and sparks to you engine. If camshaft sensor goes bad it will seem like your fuel pump and ignition coil is bad even-though they are good. Faulty camshaft sensor may caused you to have this issue and problems such as sometime it run good and all of sudden it shut off, sometime its start good and others time is doesn't start. Once the sensor goes bad, the car will not run. There are two Sensor one for the fuel and one for the sparks, I would replace both sensor because soon or later if it will go bad, it will leave you stranded although if you replace one you might as well replace the other. Check the coil and test using the light or volts tester to see you getting power to the coil, next check if your fuel pump is working, fuel pump will not stay running unless the sensor sense the flywheel is turning from your camshaft sensor. next time when your car does not start, check if you getting spark and fuel. Both sensor will cost you around 130 bucks. assuming your DME, fuel pump, coil, wires, etc... is working. keep me update and I will try to walk you through. btw stop by at any auto part store and pick yourself up Haynes auto repair book for your car, its a great tools and investment to have for your next repair work if you plan to keep your car and get to know the heart of it. good luck and i hope that help some.
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