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Was running well, quit and now, no start, turns over, fuel pump runs, has spark, no start. Dump some fuel in throttle body and it will run till gas is gone. Help, Dan
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Did you check the asd relay ? Does the fuel pump run if you jumper the pump relay ?
Does the engine have normal compression, spark, and fuel pressure ?
This is a difficult problem to solve because it seems like you have fuel that you can see and won't run; and then when you add fuel manually, it runs.
The TPS throttle position switch is suppose to regulate the fuel dumped into the engine.. You may have a dead spot on this switch. Another part, a crankshaft sensor, is suppose to report to the ECM about its' revolutions. The ECM then increases fuel pressure to match the RPM.
Since you changed the fuel pump you need to check the fuel pressure.ed
it could be many things, but make sure you have fuel and spark. if you have good spark and can not tell if its getting fuel. just spray starting fluid in intake or the throttle body just open throttle plate and give it a couple of squirts of fluid.and if it starts then quits its a fuel problem. if no fuel, check and see if fuel pump is running.check the fuel pump fuse and relay first! to check fuel pump, place hand on bottom of fuel tank, then turn key to on. if it is working you will feel the vibration in tank. you may have to do this a few times. for the pump only runs for about 2-3 seconds to build up pressure in the line. but when its running its on all the time. if pump is ok. go to fuel filter to see if its plugged up.then go from there. hope this helps you ! good-day !
It could be a fuel supply problem, plugged fuel filter or faulty fuel pressure regulator. When you turn the key to the on position, you should hear the the fuel pump run for a couple of seconds. This will tell you that the fuel pump is getting power, but it could still be weak. There are other things that could be causing the problem, does the engine have spark after it stalls?Do the injectors function?What is missing from the equation? Engines require compression, fuel, spark and air to run. If it is a fuel supply issue, after it stalls, you should be able to spray carb cleaner (acts as fuel) into the throttle body to restart the engine and keep it running at an idle by feeding the right amount of carb spray.
If you turn the key to the on position and you hear the fuel pump run, does it run for longer then 5 seconds? If so then you are going to need to look at your fuel filter, if it stays running then you are going to need to look at your fuel regulator. You can also go to Auto Zone and buy a fuel pressure test kit or rent one, and check your fuel pressure on the fuel rails. Check for spark also, if you are low on spark then you are not going to fire, unless you dump more fuel then you need to into the throttle body.
what year? if it a 350. take 12 volts directly to the distributor. if its cranking then dump some fuel down the carb. that should make it run for a little. if you are getting spark you are not getting fuel if it won't start
Does engine still crank? If so you have to check for Fuel, spark, compression. when your engine quit ..odds are good you lost one of these. check for fuel since modern electric fuel pumps stop working without any warning.You should be able to hear the pump momentarily when you first turn the key to "ON" If good check for spark, modern "coil pack" spark systems have a few weak links. if engine cranks and you have spark and you don't know how to check for fuel spray some starting fluid in your air inlet and see if it will start momentarily
Listen at the back by the fuel tank for a 1 to 2 second prime cycle whirr from the tank when turning the key to run position after it has been off for at least 10 seconds. No noise means no running pump. ....and no noise means..... Most likely it will need a new fuel pump....80% Fuel pump relay 10% Fuse or bad wiring 10%
The quick fix to get home is to crank the truck to create oil pressure to fire the pump......and while cranking WHACK the tank hard with a 2by4 or something like that....to jar the pump..... and it may start running long enough to get it somewhere to be repaired. This works 60% of the time on a dead pump.
If you do hear a whirrr.....you most likely need a ignition module or crank or dist pickup.
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