Question about 2000 BMW 3 Series

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Engine sometimes kills when trying to accelerate from a stop

I have a 2000 BMW 328ci and every once and awhile the engine will die when i try to accelerate from a stopped position, but will start right back up with no problem whatsoever from neutral right after it. Also, my check engine light is on, but nothing seems to be wrong with the engine. And the computer chip was replaced with a new one, but the outside temperature on the control panel says its -40 degrees F, which is far from true. What could be the problems??

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  • db168706 Apr 14, 2009

    I just got back from Autozone and they ran the OBD 2 problem test. There were like 6 codes that came up, but the guy said some of them were repeating. The main one he said was the air fuel sensor. He recommended I take it to a shop and let them check it and see which is the problem. The car has 86,500mi and is getting close to the 100,000mi tune-up. What would you recomend to do?? I am a college student and money is a bit scarce for me.

  • db168706 Apr 14, 2009

    Ok, I will change the O2 sensors and see how it works out. How many are there, where are they located, and what size would I need?? I'm not too mechanically inclined, but would like to learn more about this stuff. I appreciate your help. And what would you estimate the cost to be for all this??

  • db168706 Apr 14, 2009

    Ok, and would this possibly cause the car to stall on occasion from trying to accelerate from a stop?? It sometimes feels like it doesn't kick into gear right away, or is this the intake as well??

  • db168706 Apr 16, 2009

    I went back to Autozone and had them run another OBD 2 code test, but this time i wrote down the codes:

    P1250
    P1188
    P1397
    P1189
    P0340

    This is the list I got and P1250 was on there twice. I also cleaned the intake and the MAF, which the MAF was not dirty at all and looked seemingly brand new. I am in the process of lining someone up from back home to change the O2 sensor.


  • db168706 Apr 16, 2009

    Is that all the codes mean?? Or is each one meaning something different for my car??

  • db168706 Jun 14, 2009

    Hello again, I am in need of a new starter for my car now. I am wondering where the starter is located, and how hard it is to replace?? I have a family member who work for Honda and has worked on cars before who was asking me how hard it was, in order to possibly save on labor costs. Thanks!

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  • BMW Master
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If the check engine light comes on there is a problem, the source of the problem that caused the check engine light to go on will set a code into the memory of the PCM (Powertrain Control Module), there are really just a few things that can cause this hesitation stall you experience, one is a dirty intake track and idle speed control valve, the other 2 items are the TPS (Throttle Position sensor) and the MAF (Mass Airflow sensor). The 1st thing i would recommend is a trip to Autozone or Kragen auto parts and have them run an OBD 2 trouble code test, they will do this for free. I also recommend you clean the intake by doing the following.

Posted on Apr 14, 2009

  • 8 more comments 
  • yadayada
    yadayada Apr 14, 2009

    ontinues..

    Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation with stall of idle (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

  • yadayada
    yadayada Apr 14, 2009

    A TUNE WILL NOT CURE THE CODES, WHEN PARTS WEAR LIKE PLUGS THE COMPUTER JUST COMPENSATES FOR IT AND THE CAR RUNS NORMAL, I WOULD SUGGEST YOU REPLACE THE UPSTREAM O2 SENSORS THOUGH, ALSO MAKE SURE U HAVE NO INTAKE VACUUM LEAKS THAT COULD TRIGGER A CODE.

  • yadayada
    yadayada Apr 14, 2009

    what they called an air fuel sensor, that is really called an O2 sensor.

  • yadayada
    yadayada Apr 14, 2009

    THEN ARE IN THE EXHAUST PIPE JUST AHEAD OF THE CATALYTIC CONVERTER.

  • yadayada
    yadayada Apr 14, 2009

    WOUKLD U LIKE TO CALL ME INSTEAD OF THEIS BACK AND FORTH? 925-459-0571

  • yadayada
    yadayada Apr 14, 2009

    TO RECAP

    1. REPLACE THE O2 SENSOR

    2. CLEAN THE UPPER INTAKE AS I OUTLINED, DO EXACTLY THE PROCEDURE I GAVE U FOR BEST RESULTS.

    2. CLEAN THE MAF SENSOR.

  • yadayada
    yadayada Apr 16, 2009

    Take a look at the fleiable rubber air intake hose for cracks. see photo below, if it is cracked and I am sure it is, replace the hose, then clear the codes again and drive it.



  • yadayada
    yadayada Apr 16, 2009

    That should have read flexible rubber air intake hose to engine TYPO.

  • yadayada
    yadayada Apr 16, 2009

    yes The codes may all be related to the cracked hose. repair it and do what I said.

  • yadayada
    yadayada Jun 14, 2009

    Bottom rear of the engine, I understand the exhaust header pipes must be removed, the car will need to off the ground, this will require a good floor jack and car safety stands, always use car stands, I had a car fall on me once, it is an experience I have no wish to repeat. Also make sure the battery is disconnected before u start work

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