I'm using a line wrench on the fuel filter nut & a open end on the end closest to the carb, to hold it in place . I can't get it loose, I don't want to strip it.
So..... any ideas?

 

Where are all these '84 thirdgens coming from all of a sudden? Anyway, you're on the right track, the nut is going to need some persuasion to break free. Try spraying the fuel line connection with WD40, let sit for 5 minutes or so, then apply firm steady pressure. Careful of your knuckles when it breaks free.

 

Puffff! Too hard.

In my FWD V6 I used 1/2 - 3/4 WD40 can, gloves, 1/2 - 1 labour hour, a big steerson wrench capable to make force against the stupid nut, an open end wrench and a snap pliers (named "cayman" here) because the fuel line could turns attached to the nut.


Good luck.

Denis V.

 

yeah, I've already experinced the twisting fuel line adventure. Finally found a replacement at a wrecking yard that was in good shape. I don't want to mess this one up.
Did they make the fuel nut in a stronger metal? It seems pretty soft for what it does.

 

Invest in a can of PB Blaster...
It's a anti-rust catalyst... the best product on the market.

WAY better than kerosene-based WD-40.

It's about $4.50 / unit... but, way worth it !

 

I agree, my hex nut is a circle now.

 

For what its worth.. this wasn't on an F-body, it was on an old Mercury Zephyr, but- same thing, carb line froze to the filter housing. Trying to get the two separated was turning the tube nut and filter housing into a mess- and it wasn't my car, so I got a little worried.

Instead, I was able to loosen that line by the fuel pump! So I unhooked that whole fuel line (pump-to-filter-housing). Then I brought it all down (the fuel line attached to the filter housing) to the workbench. That's where I put the filter housing in the vise, a LARGE open-ended adjustable wrench on the tube nut, and tapped the wrench with a hammer. It loosened up, I changed the filter, AND i put some anti-sieze on the threads of both tube nuts before putting the line back into the car.

I prefer the LARGE (12 inch to 15 inch) adjustable wrenches because the thicker jaws seem to work better on tube nuts. Plus, if the tube nut has rusted away a bit, your flarenut wrench may not fit tightly.

Its gotten so that I never touch my flarenut wrenches anymore unless the line is brand new and rust-free.

And hey you could always go aftermarket and get AN fittings and stainless braided hose if the line gets really bad!

 

Ah, and be careful with your fingers. When the nut loose, your hand attached to the wrench will accelerate from 0 to 100 mph in ..... 1/2 second and: AAAAAAAAUCCCHHH.