Re: starter engages while truck is running , need help PLEASE!!!
If you haven't found a solution yet...
Get the battery checked out at a reputable shop and have the whole electrical system load tested. This can help pinpoint any gremlins or problem areas. Water ON the PCM shouldn't cause a problem...only when water gets into it. A new one isn't cheap as you have to have it fitted with your VIN and such to pass emissions (depending on your area of course), but the engine calibrations will have to be carried over. Simply buying a PCM from another 4.6L truck may work for a while, but after the PCM tries to learn the system and figures out it's on a different vehicle, it'll start causing you problems. Dealer is the only one to go with to swap this out correctly = $$$.
'11 Ram Quad Cab 4x4 SXT 5.7L HEMI (stock); 48,500m
'06 Pontiac G6 GT 3.5L 220hp; 64,000m
'12 Chrysler 200 Limited 3.6L 283hp; 28,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!