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  #11  
Old 01-12-2020, 05:00 PM
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When I try to start the car, the sound of the engine is weak and the battery voltage is 12.2.
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  #12  
Old 01-13-2020, 08:36 AM
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Does anyone know where is the EWS located for 2001 BMW X5 3.0 and how to test if EWS is bad?

Thanks Henry
Following are OK below:
Battery

Fuel Pump
Fuel relay
fuel pressure at the fuel rail


Need to do the following below and will update when my friend has time for help:
injector pulse
sparks and coils

Last edited by uhenry1; 01-13-2020 at 10:11 AM.
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  #13  
Old 01-13-2020, 04:03 PM
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If there is an EWS issue, I don't think the car will turn over....
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  #14  
Old 01-13-2020, 04:19 PM
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You need a scanner that can read the modules. Foxwell nt520 is an example.

I've heard that ews fault can allow crank no fuel or spark. But I've not seen an official document to say for sure which is true.


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Old 01-13-2020, 04:19 PM
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If you're getting fuel but no spark you should be smelling fuel from the exhaust. Is that the case?


Have you measured the fuel pressure? I think the M54 has a measuring port on the fuel rail that has the same size/shape as tire valve.


I'm thinking crank position sensor or fuel pump but you need to do more diagnostics before you start throwing parts at it.
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Old 01-13-2020, 04:25 PM
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Quote:
Originally Posted by andrewwynn View Post
You need a scanner that can read the modules. Foxwell nt520 is an example.

I've heard that ews fault can allow crank no fuel or spark. But I've not seen an official document to say for sure which is true.


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The primary lockout from the EWS is in the starter circuit, so if the key/EWS paring is off, it won't crank, but I guess other EWS issues might allow a crank but no start situation.
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Old 01-13-2020, 04:34 PM
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As upallnight said get a read on spark and fuel injectors. One or both not doing their job.

If fuel injector working but no spark you should smell the unburned gas but I suspect the computer is smart enough to not keep spittng out fuel if no spark. I would still try to get a reading on each so you know if either is working to figure out the next step
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