I have a 1991 Ford 350 Diesel. 2 fuel tanks under the flatbed.I used up 5 gallons of a full front tank, gauge read empty and truck stopped running like it was out of fuel. What's going on? My friend says that a mud dabber may have clogged up the air intake at the top of the tank.He says that by removing gas cap and allowing air to enter the tank, may tell me if the air intake is clogged. What do you think?
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the fuel level sender is inside the fuel tank, part of the fuel pump assembly. did you or was the tank replaced before??they may have bent the float arm on reassembly . you can buy the sender from your parts supply store .you will have to drop the tank to do this it clips onto the side of the pump assembly. run it almost dry first as the tank is big n very heavy even 1/4 full. you can try to bend the old arm
but its very hard on the "sender" as for level indicator full to empty, think of the shape of the tank narrow at top to widest point in the middle (full to half) wide middle to narrow bottom( half to empty)
If your fuel gauge is showing you in accurate readings this is normal to all vehicles that are not used to fill-up gas full regularly but sometimes the cause of the inacuracy is due to faulty float valve in the gas tank you need to replace it
check the calibration of the sender unit as may actually be on empty. Find out the exact capacity of the tank and add a known amount of fuel and see where the gauge reads. For example if the tank is 60 ltrs or 20 gallons add 5 gallons and see where the gauge reads. 5 gallons in 20 gallons should read 1/4 or in your case after the engine stops should read 1/4 full. If it reads 1/2 then the sender is out.
mine did the same thing 2 years ago. i assume it is probably the fuel gauge sending unit in the fuel tank so i priced a new one. as i remember it was about 350.00 for just the part. my computer reads in gallons and is still accurate as to telling me how much fuel i have used so when i use 10 to 12 gallons out of the tank i fill it again. so far i have had no problem doing it like that. just don't run out of fuel because that is really bad for fuel pumps. mine has a 14 gallon tank so i make sure that i never go below 12 gallons used. i usually try to fill at 10 gallons used
crack open an injector line and look for fuel at that point if no fuel there, take off oil filtertype fuel filter and look to see if it has fuel in it..we had a ford f650 superduty that a driver ran empty and were forever bleeding att hthe air out of the system to restart it..on diesels the system can have no air in the lines anywhere..so if the filter is empty, fill it before installing it...saves on the starter getting hot...in extreme cases you can pump pressure into the tank up to 20 psi and force fuel up front be careful on plastic tanks though...good luck and repost please...
The Ford trucks were recalled for the tank switch replacement. Somehow the switches would pump fuel from one tank to the other. This would cause the one tank to overflow and or result in a fire from hot exhaust temps coming into contact with the fuel. Check the dash tank switch. It is probably bad.
sounds like you have a problem with the sending unit in the front tank. The pickup may have broken off only allowing the top half of the fuel in the tank to be used. Chances are you will need to drop the tank and check out the sending unit. I would also repair the rear tank, parts are cheap and it is very nice to have a redundant fuel system.