Hey all. gotta question for you. so i park my truck in my driveway every night usually with the front end toward the garage like this so the front of the truck is up on an angle. welll the other day I noticed some stuff on the driveway. I cant tell what it is but it has the consistency of gritty mud and kind of smells oily and burnt. Now this stuff is literally covering the back half of my gas tank and some of it is even on the beds sheetmetal. so it looks like something sprayed all over but I cant figure out what. I felt the differential and it seems to be dry. I tried to feel around the gas tank but I cant tell whats going on.

Is it possible that its a gas leak and it somehow gets all coagulated somehow? It is a sludgy consistency should I be worried about it being in the tank?

Ive noticed that a lot of times Ill look at the gas gauge after I park for the night and say "oh I got enough gas for tommorow" and than the next day It is lower than the day before. for example last night I swore I saw it had an 1/8th of a tank left and had no low gas light on. than this morning I started the truck it was on E and the light was on. I figured that it was just how it is with this truck but now im wondering if im losing fuel. is it possible?

The spot on the driveway is underneath where the back of the truck is every night. the other day I parked the opposite way in my driveway (so where the spot is the engine is over it) for about an hour and my dad thinks that its oil from my truck when I parked that way. but im thinking no way not that much after an hour, and why only when its parked on a certain angle and not any incline?

any guesses guys? im gonna take her to a mechanic soon. and sorry for the long cconfusing post. I just bought this truck a month ago and they said they did an inspection and there was no leaks (dealer) and now all of a sudden there is! btw the truck has 115k on the odo I just want to know what to look for

oh and its an 03 hemi QC 1500

 

clean it all off real good then see if you can spot where anything is leaking from

 

That's really strange.

Seems like you have a leak in your exhaust maybe? Sludgy oily consistency is usually only from oil.

smell the sludge next time. I don't see any way that's happening when you're just sitting. Fuel pumps usually keep pressure in the lines when ignition is engaged so it could be a failure of that pump/valve shutting down. with a broken seal maybe? I just don't understand the back half of the gas tank. Clean it off and get some dish soap and water in a spray bottle and spray the entire underside of where the sludge seems to be and come back to see where a big pile of bubbles are.

Totally stumped, but that's the best i can give with what i know.

 

You definitely going to need to pick up some Purple Power or Mean Green or even a good citrus based engine cleaner and spray everything under the truck and clean it good. Once that is done then you can find where it is leaking and go from there.

 

it was the pinion seal. thanks guys!

 

As far your gas guage goes, when the fuel cools off, the volume of the fuel contracts. The weight remains the same, but the volume decreases.