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Raw fuel smell

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Old 08-25-2013, 05:39 PM
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Talking Raw fuel smell

I keep catching whiffs of raw fuel when the truck is running. Today was the first day I noticed it. Looked around and didn't see any apparent leaks, made sure my water separator was closed, don't see it under the truck anywhere. Is there any suspect spots I should check? I know it's a diesel and I'm going to pry smell it every now and then but I could definatly smell it in the engine bay when I was poking around. And my vents when I had them on. Just a whiff every now and again. What do you all think? Sorry if it sounds like a dumb question. Still learning here. truck doesn't run any different maybe I'm just being over cautions. But the only place I want my fuel going is the combustion chamber!

Last edited by madMatador78; 08-25-2013 at 05:41 PM. Reason: Didn't want that stupid smiley face there. Now I can't get rid of it.
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Old 08-25-2013, 06:55 PM
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Check the fuel lines going to the fpr
Mine were cracked and damn near dry rotted looking.Leaked like a cive.
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Old 08-25-2013, 07:34 PM
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I havent smelled it this after noon, maybe it was just a fluke. But I will check it out, just to be clear FPR is fuel pump? Still learning all the acronyms.
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Old 08-25-2013, 08:06 PM
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FPR=fuel pressure regulator. It's attached to the fuel bowl.

Do you smell it only when the engine is cold or do you notice it when the engine is up to temp?
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Old 08-25-2013, 08:29 PM
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Thats what I thought. Also known as IPR right? Come to think of it, it did look a little damp around right there, maybe tweak it a bit? I know its fragile, I do have a service record of it being out to be cleaned about 50K ago.

It was warmed up when I smelled it.
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Old 08-25-2013, 08:33 PM
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No, the ipr (injection pressure regulator) is on the backside of the high pressure oil pump (hpop). I have read on here though of an ipr causing this issue before. I have no first hand experience with it, the person who posted it hasn't been on here for while (Action...). He is a well respected and smart member though.
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Old 08-25-2013, 08:38 PM
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Thanks for clearing that up, I didn't realize they were 2 different things. Might try tweaking that tomorrow, It can't be leaking very much, all the other lines look good (from what I can see) never saw a drop on the ground. I'll keep checking around.
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Old 08-25-2013, 08:39 PM
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Ill tell ya..mine was pulling it in bad today with ac in normal.
no leakege under.im gonna explore the top later thhis evening
i always smell fuel smell but in the past everything has been dry as can be.i guess thats what i get for just letting it sit in my garage undriven for 3weeks.
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Old 08-25-2013, 08:49 PM
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Yeah I haven't smelled it again since I got home. Put the AC in max and it went away. Took the boat out for a while and then came home, still haven't smelled anything.
I spose its like anything with 359K, there might be a bad hose or 2 haha. I'll get a flashlight down in there and see if I can see better.
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Old 08-29-2013, 01:32 PM
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What is this thing and how do I make it stop leaking?

Well I drove it again today, its definatly after you get it good and hot.

I saw this thing was wet and wet underneath, and it smells like fuel. What is it? I tweaked it about a half turn but I didn't want to over tighten it. It also may have had some fuel inside the plug which if thats the case then this thing might need to be replaced. but I dont know what it is. It goes into the side of the fuel bowl Here is is pic:

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Old 08-29-2013, 01:52 PM
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Fuel restriction sensor.remove and replace w 1/8 " pipe plug.
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Old 08-29-2013, 01:53 PM
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That is the fuel filter restriction sensor. Mine is leaking too.
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Old 08-29-2013, 01:54 PM
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Quote:
Originally Posted by fordman67 View Post
Fuel restriction sensor.remove and replace w 1/8 " pipe plug.
Dang you beat me to it! LOL
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Old 08-29-2013, 02:21 PM
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Oh you mean for the fuel filter light? So I can just get rid of the sensor and abandon the plug?
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Old 08-29-2013, 06:22 PM
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Ya, you can get rid of the sensor. Pipe plug like mentioned, but be careful on tightening it. Don't overtighten it like you were worried about, it will crack the housing.
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