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If the problem is the fuel pump, its not because someone put regular gas in the tank. The only problem that would cause is the computer would have to turn back the spark timing to keep the engine from knocking. You would check for spark to the plugs and fuel pressure as with any no start issue.
You probably got gunk from bottom of tank sucked into pump after you ran it to low and now it is blocking gas from getting past. Happens often when ppl run their vehicles out of gas. You will probably need to take pump out and clean screen.
Have you tried cycling the key a few(3-5) times, before cranking(and trying to start it? What i mean is turn your key on, then off, and on, then off(3-5 times), and then turn the key back on, and try to crank/start the vehicle, See what that does!
If that works then you have a fuel leak somewhere.
if that DOES'NT work, fuel is leaking into your engine while it sits (more than likely bad fuel injectors!)
PROBLEM IS IN FUEL SYSTEM.CHANGE FUEL FILTER AND AIR FILTER.CLEAN FUEL INJECTORS.ADD A BOTTLE OF SEAFOAM TO 3/4 TO FULL TANK OF GAS.IF PROBLEM PERSIST.CHECK FUEL PUMP.PRESSURE SHOULD BE 26 - 31 PSI OR 31 - 36 PSI.
my '93 f-250 (4.9L) stopped running while driving, now it acts like it isn't getting any fuel. Tried switching tanks, but still does the same. What would be the problem.
If the gas in tank is that old you need to drain it. Once you have good new,clean fuel in tank. Turn key to run position,(do not energize starter just want red lights on dash to come on) listen for fuelpump whine. It will shut off. Turn key off.Turn key to run again, listen for fuelpump again. Turn off key again. Repeat this procedure total 5 times. On last time turn key to engage starter. It should build up enough pressure & fuel & start right up.
make sure there is gas in tank. turn ignition switch to the on position.listen for fuel pump.if yes check for spark at plugs.if no you dont hear fuel pump.check fuse and relay.if both dont work.scan it to check for faulty crankshaft sensor fuel pump and pcm.
a real quick way to test your fuel pump is to take a rubber mallet and have some one crank the engine while you beat on the bottom of the gas tank if your vehicle starts you have a bad fuel pump and it should be removed and replaced with a new one,
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