[valiant67]

While looking, keep in mind 1992 (3.9 and 5.2 only) and 1993 fuel rails are different than the later ones. 1994 started the returnless fuel injection system on the Magnum engines.

 

[ImperialCrown]

You may not find any reference to the quick-connect supply & return hose fitting o-rings as they are serviced with the hose assembly only. Not serviced separately.
These parts are discontinued by Mopar, but you may find 'generic' fuel hose, fitting & clamp repair kits from HELP! or Dorman at the auto parts store.
The supply line is 5/16" (Mopar #52020170). The return line is 1/4" (Mopar #52020171).

EFI hose is bulk. Sold by the foot.

 

[Bob Lincoln]

I had a leak at the return hose at the other end below, at the quick-connect by the frame. It was cracked away from the braided stainless steel portion of the line. I found a NOS line on eBay.

Unfortunately, when I tried to disconnect at the fuel rail, I found that the Dakota parts book had labeled the return and supply lines reversed (they are both 5/16" lines at the fuel rail, but the ports are different sizes, and not obvious). So I ruined the supply quick-connect at the fuel rail, which was the inboard one.

I finally fixed it with one of the quick-connects above, and in order to get my hands in there and make the line reach, had to snip the top rubber portion of the hose above the bellhousing, and use a double-barbed fitting to connect the remaining fuel hose with a short portion of FI hose to the quick-connect. I double-clamped everything with FI clamps, and all is well.

 

[Dave Z]

Just as a note to those less careful than Bob Lincoln, the fuel pressures are quite high, so any connection has to be really good... and for anyone else looking in, you always have to use fuel line, not a non-fuel-rated hose...

 

[Charger Red]

While looking, keep in mind 1992 (3.9 and 5.2 only) and 1993 fuel rails are different than the later ones. 1994 started the returnless fuel injection system on the Magnum engines.

Thanks for the extra info. I didn't know that the difference between the returnless (connector on the side) and the "non-returnless" (connector at the rear) was for these reasons - not a JTEC person

 

[Bob Lincoln]

If you splice with hose, use only fuel injection rated hose that's SAE rated at 100R06, or 30R09, or higher. These are rated to handle the 55 psi typical pressure, and have burst ratings as high as 400 psi. Hose rated only 30R06 or 30R07 has much lower ratings that should only be trusted for carbureted vehicles, despite what any clerk may tell you.

 

[Dave Z]

I thought it was more like 90 psi? But that's better advice than mine. I'll have to remember that.

 

[Charger Red]

IIRC the turbo era fuel pressures were the ones that were high and the pressures dropped over time.

Thanks to everyone for the wealth of information. It goes to show the depth of knowledge and experience that members have on this archetypal site. I couldn't find this information after many hours of searching!

 

[Dave Z]

That 90 psi was pretty darned high. I'd assumed they stayed high as they went to sequential injection and such but never really researched it. The turbo cars had a lot of issues with fuel leaks in the early days.