[chrisca70]

Hello all,

So just finished replacing my Valve cover and gaskets on my X1 2013 with the N20 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.

[smallba]

Originally Posted by chrisca70

Hello all,

So just finished replacing my Valve cover and gaskets on my X1 2013 with the N20 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.

One thing i can say, is that error probably has nothing to do with you motor as it's from CAS (Car Access System) i would rest it, and get a better scan tool. If you can get a copy of ISTA+, you may have better luck.

[kahnfucious]

Originally Posted by chrisca70

Hello all,

So just finished replacing my Valve cover and gaskets on my X1 2013 with the N20 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.

My guess is you left something disconnected - I haven't touched this car yet so I don't know what all is involved in the VCG but probably crank sensor or some sort of ground wire

[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.