The car started drove for 2 miles then stopped

Some history of the car

Water got in to the black box holding the ECU removed the ECU sprayed with wd40 on all the terminals etc with the relays removed, still no go, replaced the fuel cut off relay still no go.

Circuit tested the fuel  pump no power tested the fuel relay plug and got power, swopped like for like relays about but still no go🥺 is there some thing am missing try all the normal suspects fuses etc 
Any pointers gratefully received 

4

Could be related to a faulty CCM under the passenger side carpet if it's got wet. Have you had a diagnostic check to see if any fault codes flag up? 

Could be an issue with the high pressure fuel pump. But linked to this if the ECU has got wet has this affected the immobiliser. 

There's no power to the fuel pump in the tank will check the ccm

Please keep us posted on how you get on. I wonder if it's an immobiliser issue as the fuel pump is linked to the immobiliser as a security measure