It's called a "fuel vapor separator". I believe the stock size is .0090. The .0090 is the size of the return line. Ford then designed smaller return orifices to solve fuel starvation problems. The other sizes available to date are .0060, and .0040. I'd go with the .0040. I can get u the part number later...out of time right now. Your Ford dealer should be able to find it under that name, around $36.00. Napa carries them as well for a lot less.

 

thanks for the info - appreciate the fast turn around!!!! If you find yourself just staring at you truck with a few minutes to spare a part number would be greatly appreciated.

I have a 1986 F350 (460 cid) soon to be flat bed with all the emissions riped out. I have finally found most of the non-electrical smog gear - it is a serious task. fuel system is the final bit....


Again thanks.

 

EDTZ-9N176-D....Valve Asy Fuel. I believe that's the number for the .0090. I suggest the .0040. Good luck

 

Thanks for the info - I really appreciate it!

 

I made one from brass fittings with a .040, that's fourty thousands, not four thousandths as mine was missing!
It works great as I have 4.5 psi fuel pressure and a glass filter in line with a fuel pressure guage before it on the drivers fender and it has no restriction other than that tiny return line hole!

 

I've got one of those little buggers in my "82 E350 land yacht. I went through last summer thinking that it was my rough hot idle problem (turned out to be vacuum lines). Of course it looks just like a fuel filter, so I yanked it out and tore it open. Then I had to buy a new one......

It was put in these vans since a great portion of E350's are used as commercial service vehicles. I guess Ford's thought was that these rigs would spend alot of time just idling, so they put in "hot fuel recirculation" (8Lugs makes mention of this in an earlier post) so that they wouldn't vapor lock.

It does seem like an unneccesary complication to the fuel system that is already complex if you have dual tanks. I guess vapor lock was enough of a problem for Ford to come up with this do-dad.

 

Engineers.......buy em books, dress em up and send em to school. Look what you get. A do dad.

 

But a useful do dad!

 

Same problem haven't figured out how to fix it yet part # E3TZ 9N176 B for 0.40 size