Fuel issues
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Freshman User
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Fuel issues
Hey i need some help on a fuel issue im having with a 93 f250 7.5/e4od 4x4. I had the stopped up filter symptoms last week and swapped the filter drove about 3 miles and started acting up again but not as severe. Drove on about another 10 miles and topped off front 20 gal tank with non ethanol (gauge read 3/4) and attempted to fill rear 19 gal tank(gauge read1/4) but rear only took 7 gal. Added stabil and left. As soon as i got home 12 miles later it started cutting out again. Plugs wires and dizzy all replaced about 3kmiles ago along with both fpumps. My first thought was since I don’t drive this truck very much(got it in 2014 with 118k now has 121k) the previous 93 oct Ethanol fuel had broken down and sludged up my filter(probably been in tanks 5wks) but after the supposedly bad read on the fuel gauge im questioning other things. I haven’t checked fpressure yet. It also seems worse when at operating temperature. I did blow thru the filter and there was alot of resistance. Any ideas?
Cargo Master
Joined: Mar 2002
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From: W (BY GOD) V
If pressure checks out, either trash in fuel, fuel broken down (ethanol) and if the filter contains cellulose, the ethanol will break down the filtering media and foul the system. If the replacement filter is blocked, change filters before pressure test.
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Freshman User
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Gonna check pressure tomorrow. As far the filter media, what filter should i use if burning ethanol? Or is that a simple web search?
Cargo Master
Joined: Mar 2002
Posts: 3,132
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From: W (BY GOD) V
Well,
If the filter(s) seems to be plugged, maybe cut it open and see what you find, whether trash, rust, varnish or media separation.
Is this carb or EFI? We can go from there. You might want to install, a new filter after the first reading to verify filter blockage and after to see if pressure/volume is to spec to be sure something else did not fail.
If the filter(s) seems to be plugged, maybe cut it open and see what you find, whether trash, rust, varnish or media separation.
Is this carb or EFI? We can go from there. You might want to install, a new filter after the first reading to verify filter blockage and after to see if pressure/volume is to spec to be sure something else did not fail.
Thread Starter
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Freshman User
Joined: Feb 2017
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Well,
If the filter(s) seems to be plugged, maybe cut it open and see what you find, whether trash, rust, varnish or media separation.
Is this carb or EFI? We can go from there. You might want to install, a new filter after the first reading to verify filter blockage and after to see if pressure/volume is to spec to be sure something else did not fail.
If the filter(s) seems to be plugged, maybe cut it open and see what you find, whether trash, rust, varnish or media separation.
Is this carb or EFI? We can go from there. You might want to install, a new filter after the first reading to verify filter blockage and after to see if pressure/volume is to spec to be sure something else did not fail.
Thread Starter
|
Freshman User
Joined: Feb 2017
Posts: 26
Likes: 0
Well,
If the filter(s) seems to be plugged, maybe cut it open and see what you find, whether trash, rust, varnish or media separation.
Is this carb or EFI? We can go from there. You might want to install, a new filter after the first reading to verify filter blockage and after to see if pressure/volume is to spec to be sure something else did not fail.
If the filter(s) seems to be plugged, maybe cut it open and see what you find, whether trash, rust, varnish or media separation.
Is this carb or EFI? We can go from there. You might want to install, a new filter after the first reading to verify filter blockage and after to see if pressure/volume is to spec to be sure something else did not fail.
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Cargo Master
Joined: Mar 2002
Posts: 3,132
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From: W (BY GOD) V
Does that appear to be trash or rust particles?
Exactly what is your application?
Got It -
Are your tanks metal or plastic? You are aware there are two types fuel conditioners, one use the other storage?
Exactly what is your application?
Got It -
93 f250 7.5/e4od 4x4. I had the stopped up filter symptoms last week and swapped the filter drove about 3 miles and started acting up again but not as severe. Drove on about another 10 miles and topped off front 20 gal tank with non ethanol (gauge read 3/4) and attempted to fill rear 19 gal tank(gauge read1/4) but rear only took 7 gal. Added stabil and left. As soon as i got home 12 miles later it started cutting out again
Last edited by KULTULZ; Jan 23, 2021 at 07:02 AM. Reason: COFFEE HASN'T KICKED IN. Need JD.
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Thread Starter
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Freshman User
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metal tanks. I had them out a few years ago for new pumps. They weren’t real bad but i did attempt to clean ot. I know there is a difference in the treatment but I really am only storing fuel in tanks because it takes so long to burn it LOL. On another note, why do the fuel lines connect both tanks? It seems to pull fuel from one to the other.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
A diagram from Subford:
Fuel Delivery module details:
The Fuel Delivery Module (FDM) consists of the fuel pump, inside a reservoir attached to the pump and sender assembly. The sender assembly handles the switching of the fuel through internal valves. The fuel pump is capable of pumping in excess of 125 liters (33 gallons) of fuel per hour at a working pressure of 270 kPa (39.2 psi). These pumps also have internal pressure relief, discharge check valves and fuel return provision. To service the FDM assembly, replace it.
courtesy of Subford
Cargo Master
Joined: Mar 2002
Posts: 3,132
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From: W (BY GOD) V
What you really need is the correct SHOP MANUAL that will give you a diagnostic sequence to find the problem(s). ALLDATA has an online manual for about twenty dollars a month that is good..
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Freshman User
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i have the chilton and the haynes manuals. I haven’t checked them for this yet.
Cargo Master
Joined: Mar 2002
Posts: 3,132
Likes: 219
From: W (BY GOD) V
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky