Leaking fuel from fuel line in rear by axle,brake line and tank. Leaks right where the fuel line hooks up to metal fuel line. What is the name of fitting and can I tighten it up or do I need to buy a new fitting?
I had exactly the same problem after I changed the fuel filter. Tried new clamps and tightening them etc. Nothing worked until I purchased a foot long hose from a auto store for couple bucks and replaced the both ends with the new hoses. Old hose hardens over time and it doesn't seal well after it has been reused.
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If the metal fuel rail itself has a leak, it should be replaced. If it is leaking by an injector, the O-rings on the injectors need to be checked and probably replaced. If a fuel line to the rail is leaking, that will have to be repaired. There will be two fuel lines at the rail, the feed line in from the gas tank, and a return line from the rail back to the tank. If there is a pressure regulator on the fuel rail (it will have a short vacuum line hose to it), the regulator may also have an o-ring to keep from leaking where it mounts.
Since the Caravan is front wheel drive, there would be no transmission lines running to the rear of the vehicle. This reduces the possibilities to either a fuel leak, or a brake line. If you smell the fluid you should be able to tell immediately if it were gasoline. This would be a dangerous thing. Fuel leaks must be isolated and repaired quickly to avoid risk of fire. If it were brake fluid, and the leak were stead, you should, if you inspect the brake master cylinder reservoir, a lower level of fluid than normal, possibly even a total loss of fluid in the rear chamber. If so, then the brake line to the rear has probably ruptured from age/corrosion. It must be repaired or replaced.
Sounds like you have a broken fuel return line. The high pressure line goes through the filter and to the injection system, and the unused fuel is returned through the pressure regulator back to the fuel tank.
Most brake fluid leaks, especially from vehicles of this age are caused from rusted through lines. Take a look under the car and look at the line on the axle, you will likely find a wet spot. If you can't locate the leak easily, fill the brake reservior and have someone pump the brakes to find the source. Another common source of leaks are wheel cylinders. If this is the case you will notice brake fluid on the bottom of the drum backing plate. You can remove the brake drums to confirm this.
Two things, if you get a vibration when you are decelerating( an indication of shaft problems) you may need to replace your 3 motor mounts. But more important, most aftermarket rebuilt shafts are junk. Buy only new or Mopar rebuilt axle shafts. Anything other than Mopar new shafts or Mopar rebuilt shafts(sometimes Mopar rebuilt can be bad too) and you are pretty much guarantying that you will be replacing the shaft again with in 6 months. I own a 1993 Voyager and have replaced a dozen axles. The problem stopped with the OEM parts. Forget about the lifetime warranty offered with auto store axles, unless you enjoy replacing axles.
If what you see leaking is very oily and does not evaporate, likely it is an axle seal. If there are no leaks in the brake system, that's the only thing back there that can leak. If the axle bearing is going away, it can damage the seal so make sure you look for small shiny metal flakes behind the seal when you replace it or you will be doing the job again very soon. Can't remember...that IS rear wheel drive right?
You may have a collapsed rubber brake line at the rear axle holding pressure in the line . Have your brake lines ever been replaced? At this age it would be a good idea to do anyway to avoid any other issues .