Steve83 Posted September 26, 2019 Share Posted September 26, 2019 How much does the rear tank hold? Or, how much is it supposed to hold?Consider these charts: https://supermotors.net/getfile/739630/thumbnail/fuelcapacity925.jpg Link to comment Share on other sites More sharing options...
Gary Lewis Posted September 26, 2019 Share Posted September 26, 2019 How much does the rear tank hold? Or, how much is it supposed to hold?Consider these charts: https://supermotors.net/getfile/739630/thumbnail/fuelcapacity925.jpg Steve - You have lots of good info, but I don't understand the layout of your stuff. And while I may be the only one that understands the layout here, it does seem logical to me. In this case the information from Ford's Master Parts Catalog is at Documentation/Fuel Systems/Fuel System Part #'s/Fuel Tanks. And it should be easy for anyone to answer the question about fuel tank capacities. Link to comment Share on other sites More sharing options...
1986F150Six Posted September 26, 2019 Share Posted September 26, 2019 You have it in the right thread - weird! Is it possible that fuel is being transferred from one tank to the other? Link to comment Share on other sites More sharing options...
Gary Lewis Posted September 26, 2019 Share Posted September 26, 2019 Is it possible that fuel is being transferred from one tank to the other? Interesting question, David. Ray and I saw that happening on his '86, but it had the electric fuel pumps and a return system and the valve was returning to the wrong tank. However, Jim has a mechanical pump..... Jim - Do you have a return? As in the hot-fuel handling setup? I didn't think the hot fuel handling system was used with a mechanical pump, but maybe you added the mechanical pump and left the hot-fuel system? Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted September 26, 2019 Share Posted September 26, 2019 Is it possible that fuel is being transferred from one tank to the other? Interesting question, David. Ray and I saw that happening on his '86, but it had the electric fuel pumps and a return system and the valve was returning to the wrong tank. However, Jim has a mechanical pump..... Jim - Do you have a return? As in the hot-fuel handling setup? I didn't think the hot fuel handling system was used with a mechanical pump, but maybe you added the mechanical pump and left the hot-fuel system? Nope Gary. Pump on the timing case from day one. My switch valve is good and no transfer or the front tank would overflow. I just filled up, 17.12 gallons from dry in the rear. I used to squeeze in almost 20 when full to the neck. Something's definitely weird. Link to comment Share on other sites More sharing options...
1986F150Six Posted September 26, 2019 Share Posted September 26, 2019 Nope Gary. Pump on the timing case from day one. My switch valve is good and no transfer or the front tank would overflow. I just filled up, 17.12 gallons from dry in the rear. I used to squeeze in almost 20 when full to the neck. Something's definitely weird. Jim, is the rear tank dented from striking something? Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted September 26, 2019 Share Posted September 26, 2019 Jim, is the rear tank dented from striking something? Nope, David. Link to comment Share on other sites More sharing options...
Steve83 Posted September 26, 2019 Share Posted September 26, 2019 ...I don't understand the layout of your stuff.Are you talking about that chart in particular, or my SMN stuff in general? Generally, it's pretty random. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted September 26, 2019 Share Posted September 26, 2019 ...I don't understand the layout of your stuff.Are you talking about that chart in particular, or my SMN stuff in general? Generally, it's pretty random. The "chart" is just a page from the MPC. Most of us understand how to read the ******* manual. Link to comment Share on other sites More sharing options...
Gary Lewis Posted September 26, 2019 Share Posted September 26, 2019 The "chart" is just a page from the MPC. Most of us understand how to read the ******* manual. Steve - That would explain why I haven't figure it out. Jim - Yes, what I posted is from the MPC. Not sure what you mean. Link to comment Share on other sites More sharing options...
Recommended Posts