Cbarnes Posted January 6, 2022 Share Posted January 6, 2022 I have looked everywhere that I know to look for this. P/N EOTZ-9N176-B. I haven’t been able to find one, mine is leaking. Anyone have a spare they would sell, or know of an easy fix to delete it? Thanks, Carl Link to comment Share on other sites More sharing options...
kramttocs Posted January 6, 2022 Share Posted January 6, 2022 For some more information on these, check out the Hot Fuel Handling tab here If previously tested pressure at the carburetor was below 3.5 psi., install one of the following vapor separators to increase the fuel pressure. E3TZ-9N176-A gives 1.0 psi. increase at the carburetor (RED DOT). E3TZ-9N176-B gives 2.0 psi. increase at the carburetor (BLUE DOT). If the fuel pressure at the carburetor was too high or the concern still exists, replace the vapor separator with vapor separator E0TZ-9N176-B. If the pressure is still incorrect, check the fuel return line for blockage. If the return line is clear, it will be necessary to replace the pump/sender assembly. After service is completed, recheck pressure at the carburetor to confirm correction of the concern As for an easy fix to delete, I've never removed one from a truck with electric pumps and tried it without (that would be a good Bill question). If you had any plans to switch to a mechanical pump, that would be an option but not one I'd consider on a leak alone. Where is it leaking? I went with stainless fuel line from the separator to the carb feed line and had to really crank it down hard, let if off, then crank it down hard again to get mine to not leak at that fitting. This is more so a problem with stainless though as it doesn't seat as well but have you tried reseating it, assuming it's leaking at a fitting? Link to comment Share on other sites More sharing options...
85lebaront2 Posted January 6, 2022 Share Posted January 6, 2022 For some more information on these, check out the Hot Fuel Handling tab here If previously tested pressure at the carburetor was below 3.5 psi., install one of the following vapor separators to increase the fuel pressure. E3TZ-9N176-A gives 1.0 psi. increase at the carburetor (RED DOT). E3TZ-9N176-B gives 2.0 psi. increase at the carburetor (BLUE DOT). If the fuel pressure at the carburetor was too high or the concern still exists, replace the vapor separator with vapor separator E0TZ-9N176-B. If the pressure is still incorrect, check the fuel return line for blockage. If the return line is clear, it will be necessary to replace the pump/sender assembly. After service is completed, recheck pressure at the carburetor to confirm correction of the concern As for an easy fix to delete, I've never removed one from a truck with electric pumps and tried it without (that would be a good Bill question). If you had any plans to switch to a mechanical pump, that would be an option but not one I'd consider on a leak alone. Where is it leaking? I went with stainless fuel line from the separator to the carb feed line and had to really crank it down hard, let if off, then crank it down hard again to get mine to not leak at that fitting. This is more so a problem with stainless though as it doesn't seat as well but have you tried reseating it, assuming it's leaking at a fitting? I never had mine leak, but unfortunately it and all of the other stuff is long gone after the EFI conversion. It is nothing more than a crimped cylinder with 3 inverted flare fittings. If it is leaking at the crimp, or where the fittings attach I would imagine it could be soldered or brazed. It is a necessary component of the hot fuel handling package on F series with the 460 and AC as the engine heat will cause vapor lock on the mechanical pump in hot weather in traffic. The vapor separator serves to return gas vapor from the heat to the source tank. One thing you have to understand, this was to fix a problem that was caused by a decision to drop the 460 from the "new" downsized truck body in 1980 and just having the 400 as the biggest V8 available. After Chevy/GMC with the 454 V8 was killing Ford in the towing market, Ford had two choices, concede the towing market the GM or bring back the big gun, the 460. Since the 1980 truck frame and engine compartment were designed around the 351M/400 as the biggest engine, the length and width or the 460 presented a problem as did the radiator opening. Once installed the 460 pretty well fills the entire space available, even the water pump hub is extremely close to the radiator. Everything from the front crossmember on the frame up and around is pretty well 460 specific. Ford also made a running change in the exhaust system in 1984 from a single system to a dual to the muffler system. Bottom line, there were a lot of running changes as Ford corrected problems resulting from stuffing an engine they never intended to use into a chassis that ended up with an 18 year run (1980-1997). Link to comment Share on other sites More sharing options...
Gary Lewis Posted January 6, 2022 Share Posted January 6, 2022 I think I have the vapor separator I took off Big Blue. I replaced it with a return-style pressure regulator, and that worked quite well, so should be an option for you. But if you'd like to have the spare vapor separator it is yours for the shipping - assuming I still have it. Link to comment Share on other sites More sharing options...
Cbarnes Posted January 6, 2022 Author Share Posted January 6, 2022 I think I have the vapor separator I took off Big Blue. I replaced it with a return-style pressure regulator, and that worked quite well, so should be an option for you. But if you'd like to have the spare vapor separator it is yours for the shipping - assuming I still have it. Thanks guys, it is leaking at the fitting on the carburetor side, I tightened it pretty good, but didn’t back it off and reseat it. I will try that. Gary, What regulator did you use? Carl Link to comment Share on other sites More sharing options...
Gary Lewis Posted January 6, 2022 Share Posted January 6, 2022 Thanks guys, it is leaking at the fitting on the carburetor side, I tightened it pretty good, but didn’t back it off and reseat it. I will try that. Gary, What regulator did you use? Carl I used a Holley 12-881 as shown here on Summit. Link to comment Share on other sites More sharing options...
Gary Lewis Posted January 6, 2022 Share Posted January 6, 2022 I used a Holley 12-881 as shown here on Summit. But, you do have to change fittings IIRC. Link to comment Share on other sites More sharing options...
1986F150Six Posted January 6, 2022 Share Posted January 6, 2022 I have looked everywhere that I know to look for this. P/N EOTZ-9N176-B. I haven’t been able to find one, mine is leaking. Anyone have a spare they would sell, or know of an easy fix to delete it? Thanks, Carl https://www.rearcounter.com/E0TZ-9N176-B-parts2218302.html Link to comment Share on other sites More sharing options...
grumpin Posted January 6, 2022 Share Posted January 6, 2022 I have looked everywhere that I know to look for this. P/N EOTZ-9N176-B. I haven’t been able to find one, mine is leaking. Anyone have a spare they would sell, or know of an easy fix to delete it? Thanks, Carl https://www.rearcounter.com/E0TZ-9N176-B-parts2218302.html E3TZ 9N176-B is the same isn’t it? For some reason I know of that part number. Doesn’t get many hits either in a search. Rear counter as David posted has info on it. Link to comment Share on other sites More sharing options...
Mike Fawcett Posted February 28, 2022 Share Posted February 28, 2022 E3TZ 9N176-B is the same isn’t it? For some reason I know of that part number. Doesn’t get many hits either in a search. Rear counter as David posted has info on it. Has anyone ever checked fuel pressure at the carb? Factory service manual says 4.3. Mine is only at 2.2 so I've just begun diagnoses, but I'm leaning toward fuel pumps,, partially because the sender portion of both senders has always been off so I'm thinking they are simply worn out. Mike Link to comment Share on other sites More sharing options...
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