Welcome to TRS
OK lets look at fuel first
On the upper engine passenger side front is the Fuel Pressure Regulator(FPR), it will have the Fuel Return line attached to it, and a Vacuum Line
Remove vacuum line and check it for gasoline, if FPR leaks raw fuel will get sucked into the engine.
The fuel injectors all get 12volts when key is on, the computer Grounds the injectors to open them and add fuel.
There will be 1 Red wire on each injector, it is daisy chained from one injector to the next, thats the 12volt wire.
On an '88 the computer will use Batch fire injection, on a V6 that mean there will only be two ground wires back to the computer, so computer opens 3 injectors at the same time, then opens the other 3 the next time.
Should be a Light green wire and a Tan wire as the two ground wires, each going to 3 injectors.
IF......big if, one of these ground wires was shorted to ground by the water spray then those 3 injectors would open with Key ON
You could use a volt meter connected to Battery + and then test both Ground wires with key off, shouldn't be Grounded, so 0 volts
On the fire wall toward center on passenger side is the MAP sensor, this is the main air/fuel mix sensor used by the computer
It will have a 3 wire connector and a vacuum line
Make sure connector is clean and dry inside and test vacuum line, make sure it holds vacuum, no cracks and is hooked to intake manifold
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