Question about 2003 BMW M3
Well you have done a few things so you have had a go thats good
NOW you say you can hear the pump working,, so that rules out the Immobiliser fault ,but try turning off the key 10 times from off to start position and it should start on the 11 time???.
You could also try bypassing the starter motor relay as then you will no weather its the relay at fault or not.
Posted on Nov 17, 2009
Removing the battery does not always clear error codes and you will need a diagnostic tool to overcome/clear or read this error and proceed further.There is a program called digimotolite which is free and works on most post 1997 vehicles,do a google search and download it.Then go on ebay and look for something called ELM 327 cable which will allow you to connect your pc to your car and it becomes a diagnostic tool...There you go,you got yourself a diagnostic tool for less than 30 usd or so...worth 4,000 usd!! Now when you diagnose you will get some error codes which you need to google in order to understand what needs changing..Hope this helps..O by the way, any repair done will need a reset using the diagnostic tool.
Posted on Nov 16, 2009
How many liters is this engine? Have you checked all relays (including fuel pump)? You can check them with an ohmmeter to see if they are good enough.
Also on the fuel rail, there is a fuel pressure test port that you can put a rag on top of port and press in the valve. Or use a fuel pressure tester. There should be plenty of pressure, if not, pressure regulator, fuel pump or pump relay may be bad for fuel filter could be clogged.
The next thing to check for would be spark. Spark starts at the crankshaft position sensor, to ignition module & coil packs, to plug wires, and then spark plugs. If there is no spark, test the crank sensor and ignition tumbler for power.
Lastly, the ECM, test the outputs to the igniton system from ecm to make sure ignition is getting and sending power.
You can also test almost every sensor with an ohmmeter to see if it has resistance.
You can go to autozone.com and register for full free online repair manual for your vehicle.
Posted on Nov 16, 2009
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Posted on Jan 02, 2017
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