So I replaced the plenum gasket on my truck this weekend with the kit from hughes. 14 hours over the course of two 1/2 days to get everything back together, I finally get everything buttoned up and the Fuel Line that connects to the fuel rail is leaking! And I don't mean leak as in dripping, I mean leak as in pouring fuel onto the ground.

So I take the connection apart again, replace the clip that snaps onto the fuel rail with one from my donor motor, replace the o-ring get it back together and it still leaks! Does anyone have anyidea what I'm doing wrong? My truck has been down since Saturday evening and I really need to get it back together ASAP!

Also when I had it idling for about fifteen seconds my oil pressure gauge is reading 0. Any ideas on this? Is it even possible for a motor to run with 0 oil pressure? Or did I just mess up when I reconnected the sensors? If I cant figure this out by tomorrow evening I'm gonna have to tow it to the auto shop

Otherwise it purred like a kitten when I started it...well a pissing kitten...

Any help would be greatly appreciated!

1996 1500, 318, 4x4.

 

If it is a rubber line, you may have torn it or cracked it, it also may be old as hell and when you moved it it broke. with any luck you can trace that line to another junction and just replace the rubber line.

Not sure about the oil pressure on the 5.2 when I did mine the pressure sensor was to the left of the dist. (looking at it) with a wire out of it, it was real easy to knock that wire off while trying ot take the sensor out.

 

Ill check on the sensor

I don't think thats it for the fuel line though. It leaks from the connection from the fuel rail to the fuel line and the fuel line is a piece of 90degree hard pipe about 3" long before connecting to a braided fuel line.

 

same exact thing happened to me when i did my plenum last week. when u put the o-rings on, lather them with vasoline. Thats what i was told from this site, and sure enough it worked.

but later came to find, you dont need to take the fuel rail off.

 

Are both fuel rails the same? Or is one plastic and one steel. There are 2 different types of connections. Make sure the old oring is not in there still.

 

Thanks I'll have to try that this afternoon when I get back to my truck. I'm doing all this at a friends who has way more tools than I do.

 

Never use Vaseline- ever, for lubing o-rings. Use mineral oil or brake assy lube or even clean motor oil in a pinch.

 

He doesn't listen when told to stop recommending putting additives in the tranny, so I didn't bother with the vaseline! LOL

I'll leave it to you CM,to tell them why.

 

Ironically the motor runs just fine with no pressure. I had a squirrel bite through the hose that connects the fuel rails and gas was pouring out with the motor running just fine.

For your leak, are you talking about the connection where the fuel line connects to the fuel rail that requires the special tool? I had a problem with mine leaking and pulled it off and put it on a few times to get a good connection.

 

I learned this from Rob Stark. http://www.robstark.com/ He's a FI specialist and an all around wiz on everything. I consult with him on and off and, he told me never to use Vaseline. I was at his shop a few weeks back as he was checking my injectors for me as he's got the tools to check flow rates, lbs/hr , matching injectors etc.

Anyway, the issue with using Vaseline for a medium is that it ends up in the injectors thus ruining them. Light oils are fine but, petroleum entraps dirt, debris, the viscosity is thicker than gas and oils and, well, quite frank, it's not going to flow through an injector. It remains inside the injectors and ends up impeding fuel flow, sometimes it remains stuck open thus creating a leaky injector and, in worse case scenarios, it clogs them solid.

They wonder why they have misfires. People rip off the ignition wires, take out the plugs, change the cap, check the coil, replace the PCM when, the root cause is a clogged or leaky injector.

Then, you have to take them all out, and pay someone like Rob to clean them and, at 40-50 bucks a pop, that gets expensive.

That's why it's a must to never use that as a assembly lube- ever. Hope that clears that up. Hope for his sake that he listens this time otherwise, he's going to be shelling out big money for a new set of injector or, for cleaning them.