The BMW developed a Problem with cold starting, I can only cold start with the Throttle position sensor disconnected and the engine does not run smooth through the revs. with the Throttle position sensor connected will start and stop within 20 seconds.
Your Vanos are shot. here's the link to Beisan Systems. They sell a DIY kit to repair the vanos. http://www.beisansystems.com/ or Dr. Vanos sells a rebuilt Vanos using the kit from Beisan Systems..... http://www.drvanos.com/ Either solution will address your issuel which one you choose is based on your mecahnical expertise...
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
A couple of possibilities - first I'd check/replace fuel filter. Then clean MAF (Mass Air Flow) sensor and if those don't cure issue then it's TPS (Throttle Positioning Sensor) replacement time. Check w/BavAuto or Pelican Parts online - both good sources for info & parts
SCAN IT CHECK COOLANT SENSOR IT WILL CAUSES STARTING PROBLEMS IF ITS NOT WORKING.DOING COOL ENGINE START UP COOLING SENSOR MONITOR COOLANT TEMPERATURE SENSOR.IT WILL ENRICHEN FUEL MIXTURE JUST FOR COLD STARTING ENGINE.IT WORK LIKE SAME PRINCIPAL LIKE A CHOKE ON CARBURETER ENGINE.WHEN ENGINE WARMS UP THE COOLANT SENSOR AND OXYGEN SENSOR WILL LEAN OUT FUEL SYSTEM .WHICH IS CLOSED LOOP.CHOKE ON CARBURETER WILL OPEN AUTOMATICALLY AS THE THERMOSTATIC METAL COIL WARMS UP.YOU NEED A RICH FUEL MIXTURE WHEN COLD STARTING ENGINE.NOW A CLOGGED AIR FILTER BAD PLUGS + WIRES CAUSE WEAK SPARK NO START UP.SO I WOULD HAVE A GARAGE OR SOME BODY WITH A SCANNER SCAN IT TO SEE WHAT THE PROBLEM IS.YOU WONT SPEND TOO MUCH MONEY GUESSING.
if the throttle plate is sticking clean it with throttle body cleaner with an old tooth brush. if still doing the same, it maybe the throttle position sensor is acting up. need more info to help. you at idle. starting up car. when hot or cold motor. best of luck
the 318 is fuel injected and has no automatic choke,it does have a cold start system to aid in cold starts,the most likely cause of your problem is a bad or dirty throttle position sensor.you may also need to clean the throttle body and throttle linkages or cables