what do i need to flush fuel system? - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 09-03-2012
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what do i need to flush fuel system?

im getting a 98 ranger v6 but was told it has 2 yr old gas and dirty fuel injectors and a dead batt.. my plan is to add some stabalizer to the gas to remove moisture and put in a few gal of new gas, replace fuel filters and put in a good batt and hope it starts and will drive atleast the 2 miles to get it home.. will i need anything special to replace the fuel filter and does that fuel stabalizer really work?
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Old 09-03-2012
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save upirself alot of headaches and just drain the gas. do try to mix with new and run it, it's just a headache waiting to happen. drain it, pull the injectors and soak them in a little fresh gas. put a little fresh gas in your tank along with a little injector cleaner, turn your key a few times to get the fuel to pressure the lines, but don't start it. let it sit for an hour or so, then pull the filter, and hold the shrader valve open to let the gas in the lines gravity drain back down and out of the line where the filter was, maybe even try to put a little pressure behind it with an airline. then install new filter, hook everything back up, turn the key to pressure the lines, then try starting it.
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Old 09-03-2012
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ok.. first off what is the shrader valve? im gona guess its at the fuel filter? and so i dont go doing more than i have to l, to drain the tank id probably pull the sender and siphon from there.. is there an easier way? if i pull the filter will the tank shipon out on its own?
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Old 09-07-2012
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k i couldnt find a spot to get the gas out.. it did run ok so i just drove it home but now id like to get that old gas out and flush the system the right way.. i know how to change the filter and im sure i can figure how to get the injectors out but how to drain the tank? poke a hole in it then jb weld it shut? jk
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Old 09-07-2012
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I would research the lever type oil plugs, the same company made a lever type self tapping drain that you could put on the fuel tank. I dump about a pint of fuel via this plug about every three months. You would not believe the crud that comes out.

The schrader valve is that tire valve looking thing on the fuel rail. Rangersport07 gave some good advice here, but I would advise using air or gravity to push the bad fuel back into the tank. I do not recall if the '98 had a check valve on the fuel lines, but many do. These check valve are rather flimsy, and if 'blown', will not hold fuel in the lines for starting.

On the schrader valve, if you have an lock on air chuck head and some hose, do it that way, key on (pump running), put air chuck on schrader, and let the bad fuel run out the hose to a container. That way you are not spraying the engine compartment with fuel.

I do not know if you have an FPR (fuel pressure regulator) on yours, but if you do, that would be the next thing. I would simply replace it.

Good luck.

Librum
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Old 09-07-2012
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If you've already ran it, I wouldn't worry about the little bit that is in the line.

Take the gas tank straps off and drop the tank. get as much of it out as you can, then bolt it back up.

put as much fresh gas as you can into it.
use some Seafoam and do the treatment where you pour it into the engine after running a tank or two through it.
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Old 09-07-2012
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have to clarify its actually a 97.. my uncle said 98 but seems he doesnt know crap about this truck lol.. ill drop the tank and give it a good cleaning to wash out any crud and then give it the seafoam treatment.. then that should clean the injectors pretty well right? then i plan on new plugs, wires, fuel filter and im use to points, cap and rotor but this is a little newer than a 71 beetle so whatever it needs in that department.. ill just get whatever the oem part is unless you guys know of a better option to go with..
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Old 09-08-2012
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Motorcraft or Autolite plugs and wires. Thats about all you really need in the name brand department.
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