water in fuel..

i was driving around today and noticed an excessive amount of frost around the exhast area of the truck. i looked at other vehicles around and did not notice near as much or any on the vehicles around the area im in. I know this is probably caused by the fuel i use, right? I usually go to AFFES stations on base (not sure where they get there fuel from) Could this cause problems with the internals of the truck?

 

does your engine have any "spark knock" (a ping sound) when you are driving or revving the motor?? you may be able to add some type of water remover to your gas tank if you think it may have water in it. also, maybe add some techron to the gas, as it will clean up the fuel system. im not exactly sure of damage that water in gas can cause, but i do know that your motor wont run as efficient as it should, and your mileage may drop a bit.

 

What do you mean by 'frost on the exhaust'?

There's a big difference between condensation and water in your gas. If you had water in your gas - the truck would run like Chit/poop. Water is heavier than gas so it would sink to the bottom (for the most part) and if your gas tank is near empty - the truck would run like major poop chit.

How often do you drive your truck?
If you'll notice - at first when you start your engine, there's usually some drops of water that come out of the exhaust. This is moisture from the air (condensation) that collects while the engine is still cold (so to speak).
Atleast, I think that's what happens - perhaps someone can explain the science of it all.

Do you take short trips?
Perhaps your truck isn't being driven long enough to warm up enough - and why you're getting condensation/frost on the exhaust.

I dunno - just guessing.
You can buy Dry Gas or other water eliminating substance to help 'burn' the water in the gas. (Dry Gas - Ethanol = mixes with water so it won't freeze).
But until you can prove that you have water in your gas, the Dry gas additive is probably useless.

 

tacomaman- I have noticed a knocking sound in the engine that seems to be louder than normal during idle, or it could just be me. I'll turn down the radio tommarow on my way to work and listen. As for the mileage, Im not sure. i get about 200-250 miles on 3/4 tank of gas. Mostly highway driving at 65-75mph. But i havent noticed any performance problems.

Janster- Its not on the pipe, but the truck itself. I drive 30 miles to work everyday during the weekday. After the drive there is a layer of frost covering a large area of the rear fender where the exhast exits the tailpipe. id enter a picture but need a site for URL

 

I have been getting a white deposit near the exhaust exit as well, but lets think about this. A byproduct of combustion is water, basic chemistry would tell you this. So I'm thinking the water vapour from the exhaust is collecting near the exhaust exit and freezing, which would leave the white residue (frost). But about your knocking issue...I do not have this problem. What grade of fuel are you running? I run 91 octane.

 

of course..but looking at my wifes and others vehicles they dont have the same problem, i run 87 octane, could be the position of the pipe I suppose, but 75mph on the highway and its still forming?? im going to start filling at Cheveron, see if i notice anything