O2 sensor change, engine won't start

[Pac8541]

2001 Disco 2

Just swapped out all 4 O2 sensors with parts from Atlantic British:
#MHK100920 (front)
#MHK100930 (rear)

No issues in removing and installing and all connections are good. Pretty painless operation overall. Left the key in the ignition and in the accessory position during procedure and was listening to the radio.

When I turn the key now to start the engine I'm getting plenty of juice but no spark. Engine will not start or turn over. All I'm hearing is the relay clicking away. Last time I did this I replaced only the passenger side sensors and this did not happen. Those units were Bosch from a local parts store.

I've checked all the fuses under the hood and they're all good.

Ideas?? Kinda need this to run today... thanks.

 

[joey]

You may have ran the battery down... check it for out put or jump the rover.

 

[Pac8541]

Ya know, the opportunities for this vehicle to make me look like an ass never seem to end... I never get these feelings when it comes to my YJ.


Yeah, it was the battery. Before posting anything I tried to jump it with no results. I left it connected to a running vehicle for several minutes with no change. Then I sent my 10 yr old out to try it again and I heard it try to turn over for a fraction of a second. I just let it charge off a running vehicle for 20 min. and it started right up. I had no idea that leaving the radio running for the half hour it took me to swap these things out would drain the battery to that point, especially after seeing all the interior lights and dial come on when I tried starting it the first time. I think I need to replace the battery.

Thanks for responding.

 

[Disco Mike]

800 plus CCA or you will have problems.