That is a drain for the intake valley. You need to get on top of the motor and look close under all the wires and stuff. Most likely it is coming from the area under the HPOP up front and running down the valley and out the back. Use mirrors and a good flashlight.
1986 Suzuki Samurai with VW 1.6TD 30 MPG on 30 inch tires
Early 1986 (1985) F250 Supercab stock 6.9 bought with 70,000 miles in 2008. Stock skinny wheels and stock 3:55 limited slip axles. Rebuilt trans with E40D first and second gears. SOLD
1999 F350 Dually 6spd manual trans. Banks exhaust, Modded impellor and Big Head Waste gate, DP TUNER flashed PCM, Full Force Diesel Single Staged Injectors. EBPV mod for exhaust brakes. Hutch Mod to gas tank. SOLD/TRADED
2001 Excursion Limited Auto trans many buttons I still am finding. Factory 3 inch lift low mileage. 100% stock today we will see what tomorrow brings.
AE scanner in the Inland Empire Sunny So Cal.
Living the dream 1-1/4 miles closer to heaven.