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The Blazer is leaking fuel.

AJMBLAZER

AJMBLAZER

Better to be lucky than good.
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What is it with me and my trucks leaking fuel this year?:doah:

Glad I got The Tracker to DD recently as this just started a few weeks ago. Noticed something oily all over the bottom of the truck starting around the engine. It's always leaked oil from the pan seals so I just figured that had gotten a bit worse, kept an eye on it and the oil level, and kept going until I got my new truck a week or so later.

Started to notice that after I drove it it'd pee a little of this oily liquid under the front of the engine and off the front axle. Not a lot, but it was doing it.
Realized it was diesel that was washing the oil smoodge off of the engine.
Last week my buddy's car went down on him so he's had it since then. Not driving it much, just so he'd have something to actually haul his kids around in case something came up.

I watched him drive away the other day and I could see a slow leak. Drips only but as he backed out of the driveway I had a drip spot every 5' or so.

My garage is level. His driveway is inclined but he normally backs in so the nose is up. Last night he pulled it in nose down and this morning he discovered a 2' or so spot under the front that smelled distinctly of diesel. He turned it around and viola, no more dripping like that.

So what does this mean? Any indicators?

I'll get pics and look things over this weekend hopefully.
 
No, this is coming down the engine. Gets all over the front axle and the crossmember slightly in front of the axle.
 
Since it is near the engine and if you have not had trouble starting it, I would check the fuel return lines first. With the nose down hill, your tank could be higher than the leak causing gravity to let it run constantly.

A 10' circle of diesel on the pavement is probably less than 1/4 gallon of fuel.
 
I had a leak similar to this and it was a rubber fuel supply line up on top of the motor. It could also be one of the return lines off the injectors.
 
Thanks guys. Going to have him bring it over tomorrow or go over and look at it tomorrow so I can get some eyes on it. Been too busy and it's no longer the number 1 driver anymore.

kenny, I keep thinking he told you the IP was rebuilt? The nose down hill thing made me think of the IP but it starts and runs just fine.
 
I vaguely remember something about a rebuilt IP, but I would be checking the return lines first. If a supply line was leaking fuel out, it would leak air in and make it hard to start.
 
Never did get it over here. Got busy over the weekend with the other vehicle and the party on Sunday and blah blah blah.

Be a while before I get back to this but hopefully next week.
 
Im gonna say bad O-ring on the throttle shaft right above the IP may be bad. Take the air cleaner off and check that area real good. I have the exact same problem right now. And thats the culrpit. Having the IP rebuilt as long as everything is taken apart
 
Okay, FINALLY going to get this thing back over here now that we have his car back on the road.


Week or so ago he went to drive it one morning and it died as soon as he got out of the driveway. Wouldn't restart. About an hour later it restarted, he backed it back into the driveway, and it hasn't been touched since.

I am unfamiliar with the return fuel system. What and where should I look at for all these hoses and stuff?
 
So apparently a miracle has happened and it either self healed or gremlins came and fixed it recently.

Yeah, wishful thinking but I'm a bit confused.

Went over to his house yesterday afternoon, it started up a bit slow and idled a bit odd but did start and go. Kinda put my foot in it a bit at first to keep it from bogging. Seemed to bog at stops and when first starting. However after it warmed up this seemed to go away and it ran fine.

Dripped NOTHING overnight. In fact the diesel that was previously coating the oil pan, crossmember, and front diff is mostly gone and NOTHING has leaked on the piece of cardboard I put under it. Fluid levels all seem fine.

I drove it while running errands tonight and it seems perfectly fine. Sat for several hours while eating dinner and again, no leaks. The usual small rear main seal oil leak but nothing fuel related.

Huh?

The front of the engine doesn't seem to be wet now but the valley under the IP and intake manifold is...but not liquid wet, more like oil scrunge wet.
 
The fuel return system is two little daisy chains of 4.5mm hose that jump from injector to injector and connect together with a little steel pipe T underneath the CDRvalve over next to the alternator. You can't see it from thetop of th engine but you can feel it if you trace the other return line from the top of the injector pump. I had an intermittent leak just like you describe and ended upreplacing all the little pieces of hose to solve the problem.
 
Thanks. Does anyone sell replacement hoses as a set?

Does the the fuel return system do anything under the intake manifold and around the IP? Little concerned with the wet looking grunge around there.
 
There is a place online that sells the replacement hose set for about $20. I just don't remember the name off the top of my head right now. It might be Kennedy?
 
kennyw said:
There is a place online that sells the replacement hose set for about $20. I just don't remember the name off the top of my head right now. It might be Kennedy?
Click to expand...

Does this sound right?:

[SIZE=+1]Item Name: [/SIZE][SIZE=+1]Injector Installation and return line kit[/SIZE]
Category:6.2/6.5L Parts
Sub-Category:Injectors - 6.2/6.5 Parts


Price:$25.00
Injector return line/install kit includes copper injector seating washers, high quality push on return hoses (no clips needed), and rubber end caps with spring clips along with the air cleaner base gasket for N/A engines, and upper manifold housing gasket for turbo engines.​



Fits all 6.2/6.5 engines. ​
Click to expand...

Got that directly from their site.
 
Cool, I'll order it on Friday. Thanks guys.

Any hints and/or tips on replacing these things?
 
Okay, so it's Saturday but I just ordered the kit.

Advice on the install?



I got to thinking and last year when I drove 10 hours from Northern Michigan to Lexington, KY this thing was leaking fuel for a short while afterward. Then the last issue started after I drove it 3 hours mostly freeway each way over to Bowling Green to go wheeling in mid August. Both persisted for a few weeks and then "healed up".
 
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