pressure washed the motor (was funk-tac-ular)
got "water intrusion" in 2 coils.....
they put in 2 coils & 2 plugs today (why would plugs go bad?)
can i put LSx coils on it? 
service writer said: i needed to do a fuel system clean ($200), and I should put all 8 plugs in it; at 158k miles.
BUT he also said i needed to do the fuel system clean, to clean the deposits off the bottom of the plugs, so they will come out safely & easily.
if so...how did they get the two plugs out today?
if I am going to do 8 plugs, should do i do better quality coils?
if water gets in the OEM coils, are they ghetto?
i got all the receipts on it, and it has been three other coils. (and he did NOT pressure wash it)
service writer said if that is the case, they need to check the ECM for the pulse width of the coil signal (he used a technical term, but I took a nap since then)
but basically, he said some of the ECM's are known to fry coils.