97 Discovery missing/stalling

Hay just got this problem after having motor washed up, it was running good after the wash but all of sudden check engine light starts blinking, but still was running good, so I shut down the car and restart it and now check engine light is staying on and it start stalling.

Any and all help will be appreciated..............

If you hav'nt got it figured out yet you should be able to take to an auto parts store like advance auto and get them to scan it for free. I have a 95 disco and the 95 and older discos have to have a special scanner. But a 97 they should be able to scan.