Help: Car won't start after valve cover (VCG) job

[chrisca70]

Hello all,

So just finished replacing my Valve cover and gaskets on my 2013 X1 (N20B20 engine) 82k miles. Tedious job but pretty straightforward. I have done all VCGs on all my bimmers E30, E46, E92, and never had a problem.

However, the car won't start. It cranks but it won't start. Battery was disconnected before the job and fully charged with my battery tender overnight after the job. I double checked all connections, bolt torques, etc. and all seems to be ok. I read the codes with bimmerlink and the only one I get is:

Code A10A
EWS4_Timing_Chall_Resp_Fehler
Symptom: No signal".

Any suggestions? -appreciate any input.

[328 Power 04]

You should identify the car a bit more exact, as there were a few different DMEs used on different years.

What module reported that error? I've looked through DME codes and EWS4/FEM codes for your car and haven't found that one. They typically have a lot more characters.

[jclausen]

I would check fuses and try another key

[chrisca70]

You should identify the car a bit more exact
What module reported that error?

It is a 2013 X1 sDrive28i
The module reporting the error is the CAS

I also scanned it with my c310 and I get: 31, 03, A1, 0A No found!

[328 Power 04]

Is the DME even powering up?
Are all modules powering up?

[chrisca70]

Yup all modules power up. Just disconnected and reconnected everything again and used contact cleaner with no luck. Towing it tomorrow to my Indy...

[chrisca70]

SOLVED: when reinstalling the High pressure fuel pump (HPFP) it is very important to MANUALLY crank the engine so that the exhaust camshaft is at bottom dead center (lowest point). I did not do this and broke the HPFP. Also the fuel rail needed to be primed. New HPFP kit was $300 OEM Bosch.

[328 Power 04]

SOLVED: when reinstalling the High pressure fuel pump (HPFP) it is very important to crank the engine so that the exhaust camshaft is at bottom dead center (lowest point). I did not do this and broke the HPFP. Also the fuel rail needed to be primed. New HPFP kit was $300 OEM Bosch.

Thank you for coming back with the solution! I'm surprised there were no codes set (yet) for this?

Good fix.

[pshovest]

Yes, thanks for the followup. I didn't realize the N20 needed HPFP removal to change VCG. The N54/55 HPFP's are chain driven. Which engines use the cam driven pumps?

[White94RX]

N20's and N63's for sure.