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Ford beat Saquatch77 to it. The weep hole in the muffler is a no-cost factory performance enhancement.
Okay, @99322 is serious and is concerned about an INCREASING amount of water in his exhaust system. I think we're going to need to know more. How many miles on the truck, any mods to the intake, driving habits (mostly road or mostly off-road, mostly sane or mostly wide open throttle), etc. Fill in as many blanks as you can, 99322, and then let's see if we can figure this out.
I have an idea that H2O is a byproduct of petrochemical combustion.
Situation normal.
Bailer,
The combustion of gasoline in the engine produces a plethora of chemicals. Many of these are burned in the catalytic converter producing H2O as a byproduct.
Initially when the catalytic convertors have not achieved optimal temperature the H2O produced is in the liquid form. As the temperature of the catalytic convertors increases the water produced goes straight to the gaseous state and passes un-noticed; (except in cold weather where the vaporized H2O exiting the exhaust condenses in the cold air and it appears as steam coming from the exhaust..).
Why more H2O now after 3,000 miles? Cooler temperatures leading to longer time for the catalytic converter to heat up thus less H2O is vaporized making it appear as increased liquid?
Higher air pressure again keeping the water in the liquid state longer? Engine idling for longer time keeping the catalytic converters from reaching optimal temperatures?
Most likely there is no change in H2O production; rather a change in perception!
Years ago Click and Clack on NPR had a puzzler that went something like this....
"A state trooper was notified that a robbery had just taken place at a local bank about 20 miles from his location. The thieves took off in a late model bright yellow Camaro and were headed his way. The officer went to a part of town where the roads converged and the thieves would need to pass through. As he pulled into town he saw two young men leave the local diner and climb into a late model bright yellow Camaro and begin to drive away.
The state trooper watched them drive off and waited for the thieves to arrive; which they did about 2 minutes later. The state trooper made the arrest right in front of the diner. One of the waitresses asked the trooper how he knew it wasn't the first Camaro?
He said he saw water dripping from the exhaust and knew instantly that that Camaro hadn't just travelled 20 miles...."
Eddie
https://www.aol.com/video/view/sad-...-clack--brother-tom-magliozzi-dies/518495806/