2004 BMW X5 3.0i Logo
Posted on Oct 21, 2012
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2004 BMW X5 3.0i engine starting problem

BMW seems to not start well, it turns over very good, just doesn't fire up on first of second start. Once engine does start, it is sluggish trying to run smooth for a few seconds then idles to normal. We can smell a strong gas/fuel odor after stating. Anyone else have this problem with this model? KB

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Marvin

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  • BMW Master 85,242 Answers
  • Posted on Oct 22, 2012
Marvin
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The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems ca cause many drive-ability related problem such as rough idle and other symptoms



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