Should never power wash an engine , just use a engine degreaser spray foam and with a garden hose rise off.
You will have to pull the plug leads as water has ingresses into the plug holes use compressed air to dry the plug holes , most likely full of water .
Then on the ignition pull the cables one by one and check fopr water , use WD 40 spray all over the ignition this
will dispel all water, spray on all the sensor wiring harness pull all the electrical connectors and spray WD40 .
Disconnect the battery before doing this .
When done reconnect all parts you have disconnected and sprayed then reconnect and then the battery and try and start .
Then if needed please get back to me with the reply button, and not the poor or bad service, this way i can get back to you or suggest another expert if needed.
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If you are not happy or you have sorted out your problem before the answer then please let me know with the reply button .
Kind regards Greg.