Question about 2003 BMW 325

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I have a 2003 BMW 325CI, when i go to start it, it runs for like 5 seconds and then shuts off? would this be somthing to do with the fuel delivery? Runs smooth but just cuts out.

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First thing to check is the fuel pressure, there is a scrader valve under the black fuel rail cover to the right of the valve cover, just pop off the small circle and take off the 10mm screw. Hook up a a fuel pressure guage, then turn the key to the start postion and check the guage. there should be about 3.5 bar of pressure (50psi). If it doesnt build up it could be the fuel pump of a clogged fuel filter. If all this is good, then it may be a bad mass air flow sensor.

Posted on Mar 04, 2009

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Sounds like anti-theft system

Posted on Mar 01, 2009


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My 2003 bmw 325ci instrument cluster stopped working one day, but car started and drove. Got back in the car, and it wouldn't start! Cranks, but no VROOM! Confirmed fuel flow, but no spark. How are...

Sounds to me like you have a wiring harness loose somewhere, or you have a short. Check to verify you have power at the fuse panel to the fuel pump and the instrument cluster (and, of coarse that all your fuses are good). It's also possible both problems are completely unrelated. Let us know what you find.

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When you say that it tries to start but does not turn over - I interpret that to mean that the starter is cranking the engine, but the engine fails to start. Is that correct?
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It could be so many things wrong with this car has the electronics are very complicated something has silly has a fuse may have blown fuel pump may have packed up the list just goes on. So you would be best taking your car in to a garage and asking them to diagnose your problem this could save you a lot of money rather than just replacing parts that dont need replacing.

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