Ok so when I go through river/creek crossings my engine cuts out for 2-5 minutes. Always thought I drank some water through the intake.

Well today..I replaced my T-stat...lost about 1 gallon of coolant...the coolant went under the intake manifold and over the water pump...start my engine...the same symptoms that I've had when I go over water crossings....now my question is....the coolant didnt touch any sensors...unless it travelled to the back of the engine and hit the coil packs...if thats the case...is there any way of waterproofing the coil packs?

 

Since you say "minutes" perhaps the water is not draining away from what it got into. Could "booted" cable ends get some silicone spray treatment? Is a boot or coil with a small split holding water? How about "painting" low voltage exposed connectors with varnish or what TV repairmen called "corona dope"? Vaseline? Liquid insulation "paint" [Home Depot electrical aisle] (thin RTV)? Just thinking about some ways I have had to keep water out of odd things in the past. Old skool military radios were sprayed with varnish inside to keep water out of things. Basically, you can put enough goop on anything to keep out water, but you must remove the goop to service or just swap out entire modules.

But now you can test it with a garden hose....

 

Castable epoxies will waterproof electronics. Search Smooth-On EpoxAcast 650.

 

How old are your wires, are they 8mm wires? Your engine can get wet, except for the computer, and still run well.

 

put dielectric grease in the ends of all your pug wires and other electrical connections, it will keep out moisture and prevent corrosion. then run it through some puddles to see if it helped.

 

Your crank sensor is getting wet would be my guess.
Spray your crank sensor with water and then try and start the truck.

 

yeah nothing else would have gotten wet....looking at the coils...they have a generous space between the engine and the mount...so i will look at the crank sensor..isnt the crank sensor on the back of the engine?...the coolant went down the front..by the accessory drive...and the some back under the intake manifold