So, ive got an 82 F250, its been running great since I changed the starter and the spark plugs, but today after driving it about 60 or so miles it just died. It started up again twice and ran for a few seconds and then completely died. It still turns, and its getting spark, but i dont see any fuel being sprayed into the carburetor when i actuate the throttle. Its been about 2 years since the fuel filters were changed, i didnt think they would go bad that fast, so im thinking it might be the carburetor. Any ideas or suggestions would be greatly appreciated. Thanks in advance,
A 1982 is probably a mechanical fuel pump... You say no fuel is being being pumped into
the manifold when opening the throttle by hand but I'd nevertheless want to check
pressure & delivery rate at the carb. Disconnect the fuel line from the carb, find a fluid
containment vessel (coffee can, plastic bottle, etc.) and see if a healthy amount of fuel
squirts out when you turn the key to START. You might want to put a longer rubber fuel
line on it and route it off to the side of the engine to make it easier to do.
If no (or little) fuel squirts out, check the pump... pull the feeder line off the pump and
see if a clear flow of gas is reaching the pump; if it is, it looks like the pump has issues
(in which case, check for gas in the oil, that can happen when the diaphragm breaks or
otherwise leaks). This can be messy, and the natural siphon action can result in a fair
amount of gas leaking out.
If gas isn't making its way to the pump, you've got a problem further down the line; do
you have dual tanks? If so, the tank switcher valve is suspect; if not, the problems could
be dry rotted rubber fuel lines underneath somewhere (especially where the steel lines
connect to the tanks) or with the sending unit, its pickup tube and/or filter on the end of it.
Could also be a clogged fuel system from tust & crap in the system.
first thing i see is you said it has been 2 years for a fuel filter change.. i would start there first.. but if the filter is plugged up i bet it has trashed the pump as well.. i change my filter every oil change.. that may be a little premature to some people but my pickup is strictly off road.....
I do have dual tanks, but I only use the front tank. I dont think the selector has been used in months. Would that still cause the problem?
Quote:
Originally Posted by ctubutis
I doubt it, unless maybe the rubber hoses are crumbling.
Thinking about this more, I could be wrong there, as anything is possible....
De-energized, I'm pretty sure the tank selector valve defaults to sending fuel to
the engine from the rear tank, that's an important point. Before you go
through the trouble & mess of the steps I listed above, you might see if the
behavior changes if you put fuel in the rear tank. If the problem is electrical, it
could be a bad ground or bad wiring or a failed solenoid.
The posting above brings up another good point... if your tanks are rusty and
full of crap, wouldn't it be possible for filters to clog after only 2 years?
I've heard of sticking metering rods in the carbs causing this kind of thing, too.
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