Runs fine but has stald 3 times in the last month HAVE 2 HOLD GAS PEDAL 2 FLOOR AND CRANK many times then it will run fine again Suspect it is the fuel filter but dont know where to look 2 change it the truck has 265000k on it also fuel pump was replaced 3 years ago Never changed fuel filter since new thanks Ed
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If you hold the pedal to the floor it puts the fuel system into Clear Flood Mode. This prevents the injectors from firing and lets the already present fuel burn out. Now if this has to be done on every short trip you probably have a leaking injector.
Does the vehicle seem to crank slowly or stop and then crank when this happens?
Okay, your freind may be right, that part is called the accelerator pump, it is used for starting the truck, when you pump the gas to start it this pumps a few squirts of gas into the carb. what concerns me is that you hold the gas pedal to the floor to start it, most of the time an internal leaking carb floods the engine and holding the pedal down will let it start, a quick test would be to use a carb cleaner spray and before trying to start the truck hit the gas pedal and see if inside from the top of the carb look and see if you see a squirt of gas spray out, you will need some one to push the gas pedal or you can do it at the carb, if it squirts gas then the accelerator pump may be good and carb may be leaking and need rebuilding but if it doesnt squirt then its bad and then i want you to spray the carb cleaner into the carb and try to start the truck and if its due to the accel pump then after you spray into carb the truck should fire up and run without having to hold the pedal to the floor, if thats the case then replace accel pump if it still doesnt fire until you hold gas down then crab needs rebuilding . good day. hope this is helpful.
The computer has lost its memory for idle control possibly.Try this, crank the truck and shut is off.Do this as many as 20 times , each time try to leave it running for 2 or 3 seconds so you can see if it will idle on its own.Do this till it relearns base idle.
start with trying to start the car with your foot hard on gas pedal, all the way to the floor this will stop fuel flow on start up its called clear flood mode. as the engine starts to fire and run ease off the pedal until it idles, it may take some time to run smoothly. if it doesnt run or stalls after a short time and then will not run i would try a ECU engine control unit as it supplies the earth circuit to the injectors, may be thats whats holding them open or they are dribbling badly and require overhauling
It's flooded like you say.
If it's really flooded, you'll have to remove plugs and dry them off.
Now when you crank engine, hold gas pedal to floor.
That will stop gas from spraying into engine.
You need to get the gas out of the engine for it to start.
Crank for 20-30 seconds with pedal to floor. Do this 3 times waiting 2-3 minutes inbetween cranks.
The starter needs to cool down.
Then after that start normally and see if it will start.
Remember if it will not start after 2 attempts, then the possiblity of it flooding is there and you'll have to clear out the gas by holding the pedal to the floor again.
it looks like your engine is having an over rich fuel mixture maybe, thatswhy when you press the pedal to the floor it starts becouse you allow lots of air to help clean the mixture while cranking, also you should have black smoke in the tailpipe until it cleans up and runs fine, i think youre having a leak in one our more injectors you should check them first for proper seal under pressure these is done in an injector test machine, second it may be a defective map sensor these trucks some times have a bad map and dont give a MIL (malfunction indacator lamp) and last but more rare to be is a blocked fuel pressure regulator chek fuel pressure it should be between 38 and 45 psi and it shoul hold these pressure when you turn off the engine if pressure drops fast its injector seal problems or fuel pump check
Local mechanic determined engine was flooded and started it by holding throttle to the floor and cranking 5-7 seconds - then the engine sputtered to life. It has run perfectly before and since and I'm at a bit of loss to understand why this occurred this one time - so far. It's been driven now 5 days with no problems.