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Question about a wire

639 Views 10 Replies 4 Participants Last post by  illflem, 
hoytarchery7
my dad was just looking at the engine in my truck and he found a wire that is disconnected. it is on the right side of the engine if you are standing faceing the truck. it comes out of a harness full of other wires and goes into a little black bowl type thing that has a hose in the bottom of it. it was plugged in before but only one of the wires was it looks like the other might have melted or something at one time and came apart in the middle. should we just leave it the way it was with just one wire or reconnect the second wire and plug it back in. we dont even know what this wire does. it ran fine before with just the one wire but we want to know if they should both be plugged back in. thanks for any help.

im trying to get a picture i already took some but it tells me that they exceed my quota.
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hoytarchery7
well i cant get a picture it keeps saying it exceeds a limit. but does anyone know where i can find a diagram for the engine it is a 94.

we found that the thing that it plugs into is the fuel heater/prefilter. and my dad said it looks like the two wires might be ground wires but doesnt know where they would go does anyone know?
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genestealer
Just leave it hanging there, or even better remove the fuel heater from prefilter.
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hoytarchery7
genestealer said:
Just leave it hanging there, or even better remove the fuel heater from prefilter.
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will everything still be alright if i do this. what does the fuel heater do that it should be removed?
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genestealer
hoytarchery7 said:
will everything still be alright if i do this. what does the fuel heater do that it should be removed?
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I read that it is common place for air leaks, and if you're not living in place where there are extreme cold winters then you don't need the fuel heater, and even there it won't help starting the engine.
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hoytarchery7
genestealer said:
I read that it is common place for air leaks, and if you're not living in place where there are extreme cold winters then you don't need the fuel heater, and even there it won't help starting the engine.
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we are in PA and it gets pretty cold here in the -'s. but my dad thought that it might have something to do with when it is plugged in?
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genestealer
Since you say it looks like it melted, then probably something has burned in fuel heater that causes air leak into the fuel system, so you should either replace or remove it.
Let's hear what others say.
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I
PA doesn't get all that cold, unless you are having starting problems from an air leak just leave it like it is.
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hoytarchery7
illflem said:
PA doesn't get all that cold, unless you are having starting problems from an air leak just leave it like it is.
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ok its been running fine with it like it is so will probably just let it do that. and in PA at times it does get cold we got down to -9 this year.
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ykdave
http://www.cumminsforum.com/forum/94-98-tech-articles/58777-joe-g-s-fuel-system-writeup.html

The fuel heaters are pretty useless (mine is gone and have no problems with it @ -50c or sometimes colder!). Not a big deal leaving it unplugged.

They are a common source of an air leak, so if you do have the ambition you may as well pull it apart, clean the prefilter screen and remove the heater element.
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I
and in PA at times it does get cold we got down to -9 this year.
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That's tee shrirt weather ;)
I consider -30F cold.
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