Gas Leak @ Fuel Rail

[TACO626]

I've noticed a fuel smell for the past few days, diag and traced a drop of gas coming out the main fuel line that connects to the fuel rail/fuel pressure regulator.

-The fuel line is steel braided
-Connects to the fuel rail under upper intake from driver side

I used my air gun to dry it, immediately gets wet and instantly drips on injector

Anyone have advise on the fix, I am very capable of r+r upper intake and repairing the necessary.

I did my search but honestly did not find the exact problem.

91 4.0 xlt 4x4

 

[Willard]

I would go in, remove the line, and see if it needs replaced or what. I'm gonna guess you just need to replace it, not sure how far it goes though.

 

[Blacksheep Josh]

Yeah, just sounds like the connection is bad. Or possibly something isn't sealing up correctly.

 

[TACO626]

The leak is where the hose nut meets the threaded part of the fuel rail

 

[Maniak]

I'm assuming your talking the fitting at the back of the engine and not the one on the Fuel Pressure Regulator (FPR). I'm assuming that becuase you have a 1991 and unless you changed something the Fuel line going to the FPR uses a funky press on fitting instead of a nut connection.

If its not loose and assuming the threads on the fuel rail are good then the connector on the hose has to be bad (or a hole in the hose itself).

If thats the case you need to get some replacement lines from a junk yard. If your going to go that route I'd replace both of those flex lines to the style on the late 1992/1993-1994. That style uses a nut on the FPR connection also. Those FPRs seems to be easier to find and were cheaper when I needed one. Of course, if you do that you will need to replace your FPR to the other kind which can't "hurt", except for the cost of the FPR.

~Mark

 

[TACO626]

Its a fuel line that connects at the driver side. The nut is roughly a 22mm? Looks like anyways, right above injector 6?

Anyways, I will be removing the upper intake soon and will have a better description

I greatly appreciate your help -

On a side note, Pick-A-Part is 7 minutes away and they will be having a 50% off weekend in a week or 2. I was there last weekend and I did see and peek around 2 Gen1 x's. Not sure exactly what years but hopefully will have the parts I need.

 

[Blacksheep Josh]

oh man, if there's a 50% sale going on, i'm gonna have to go back home, lol.

i need axle, seat belt, seats, hood.... wonder if that's nation wide...

 

[TACO626]

Ok so I attacked the upper intake this morning, all went smooth. Found the fuel line nut where it connects to the rail - loose! Inspected all very thoroughly and re-tightened nut. Replaced intake gasket, pcv valve, some fuel lines and a few vacuum hoses. Let it run for 10 minutes, road test to gas station, pumped $40, went to car wash and now I'm home. All looks fresh!

Time to have a 6pack to start