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Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.
Unfortunately I have seen engine washes cause this issue here.Usually water gets into an electrical component on the engine or a connector and the water has to be dried it.It sounds like it is starting to dry out as it is slowly getting better.
What I have done is disconnected one connector at a time under the hood in the engine bay and checked for any water and dried out any water I saw.I have also checked with components like ignition coils or injector connections for any water and any electrical component on the engine for any water in it.
In some cases having the fault codes checked with a compatible scan tool or computer plugged into your vehicle will help to narrow down what may have the water in it ( as a code may set for a specific component that can then be checked).
But it does need checked over for the water location and then dried out.It is possible a component was fried or damaged when the water entered it as well.
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