he said priming the system didnt help so i just figured the pumps not leaking down. so it should tell if its the injectors or not.

 

i don't have one of those testers though. It seems that when i put the pedal to the floor it will start right up. That makes me think that the only thing left would be the injectors. It seems like it is flooded

 

Most good fuel system will be down to about 5 psi if left overnight. Any higher pressure would be a plus.

 

I am sure if you had one it would read Zero in the morning.
Does sound like fuel injectors, and you may have to pull them to check them and rebuild or replace them.

 

And what will i be looking for when pulling them? any cracks or wears?. I noticed that at the base of one, there seems to be some grim around it on the intake, where-as the others are clean, i guess i'll start with that one

 

Not sure you will see anything. They are somewhat hard to to get out.
I do not know what engine you have so I can not say much more.

 

i have the 5.0, f150 supercab 4x4

 

Then you are going to have to pull the upper intake to get the fuel manifold off before you pull the injectors. You will also need a set of "O" rings before you put them back in.

You also want to read this link:
http://fordfuelinjection.com/?p=82

good luck

 

What number are the stock injectors on the f150 5.0?

 

Yellow top, 19 lb/hr.

 

oh ok, cause i saw a set of 24# for a mustang 5.0 on craigslist for a pretty good deal, figured if they were the right ones new ones would be easier then spending the time cleaning them.

 

What octane do you use? If your running higher octanes, run 87. If starting improves w/ 87, but higher octanes have been used for some time,it would also imply you would benefit to remove EGR valve to clean out deposit buildup to restore full flow (at the port opening of engine as well as the valves internal airway.also a good time to check integrity of diaphragm for leakage) , run a can of "Seafoam" (o2 sens. safe), 2/3 thru air intakes (helps remove combustion chamber deposits, also a bi-product of running the more controlled ignition formulas a lower rate of compression engine assuming your engine is relatively stock), 1/3 into tank (improves injector function) as directed.If you haven't done this before, after soak time & just prior to restarting, roll up all your windows. Lastly, remove o2 sensor and douche sensor head w/ ELECTRONIC Contact Cleaner and reinstall cause that also loads up w/residue & can greatly reducing accuracy. Beings as you just got the truck, the procedures listed above would be a good idea anyway and repeated proir to each oil change. It just seems that a condition that prevents fuel supply from mustering up a lower pressure required to start would continue to have an effect (if not even more) after start and higher pressure demands, and an injector stuck open would result in a miss if not pre-detonations and cause the o2 sens to report continual rich condition. Timing set at less than 10BTDC advance could contribute to the hard start condition & retarding timing is a popular quick fix of mechanics to avoid the ping condition that results in long term use of higher octanes in engines not specifically designed for use in.

 

ymeski:
Did you read the part about he has to hold WOT to start it in the mornings after it sets all night?
Seafoam is good into the intake using the vacuum booster hose for engine deposits but I do not buy the part about putting it in the gas tank.
To me there are two ways to clean injectors, the way the link says above and running the engine on injector cleaner with NO fuel from the tank.
I do not believe in snake oil treatments.
Ford say do not use after market treatments in their Trucks anyway (oil additives in the engine and transmission).

 

I was under the assumption that the PCM reacts to WOT during engine start as if engine is flooded and temporarily cuts injector function until WOT no longer exists. So maintaining WOT would also allow the leaning out of the combustion chamber air/ fuel ratio to stumble into an idle if a controlled combustion formula is in fact being used. This premise is viable only if in fact that is how the PCM deals w/ WOT as I'm fairly sure it does. If that aint what really happens, whoever made that up should have been around when they were designing the PCM ! The 1/3 Seafoam can in gas probably does more to deal w/continued combustion deposit removal than injector cleaning, Im just transposing the statement printed on the can. While statement like "Helps clean injectors" might give cause for an occasional debate, it probably works better for them than "Guaranteed not to screw your injectors up any worse than they already are!" As to what Ford does or doesn't recommend, just adhering to proper octane use, noted in every owners manual and sticking to the maintenance schedules (also in the manual), would clear a lot of dog and pony shows off the shelves of Autoparts stores!