00 f250 superduty v10 gas
Starts then shuts off after a few seconds. No codes coming up. Ran my scanner a few times nothing

Check fuel pressure. Could be getting enough to start, but not enough to stay running.

Check the fuel filter.

2X enough seeps through to start up but not enough fuel to keep it running.

Thanks. Gonna stop and get a fuel filter after I get the kids

Quick test , have someone start it , while you feed it some ether into the air intake. If it keeps running on ether , you know you have a fuel delivery problem.

Good to have a fire extinguisher handy while playing with ether .

Some good responses so far , sounds about right.

Dirty mass air flow sensor?

That would probably flag a code.

Dang I remember when pick up trucks were simple.You could pop the hood and work on them yourself.There were no brains or pop up codes,etc.

Points, cap and rotor days.

MAF was just a thought. Have had several come into the garage with debris on the wires, no codes stored. All those vehicles would start and die.

I've seen that too. Also most fuel related issues will flag a code for insufficient fuel pressure. But easier to stuff some ether into the intake as a quick test than test a MAF sensor. I like to try the easy stuff first. Big fan of the K.I.S.S. principal.

Had a tech in a shop I worked at do a head gasket on a car. Got it back together , fired it up. It ran for 30 seconds then shut off. Crank and start , it would run for 5 seconds. Just like it was out of gas. He spent 3 hours troubleshooting it double checking his work. Other techs asked him if it had gas , he replied there was a half tank.

Gas gauge was broken , it was out of gas.

Don't forget the knob on the dash for the choke!

I remember the choke knob.
Yep , points , cap and rotor. However , a good skill to have , some older power equipment still may have points. I still own a dwell meter and a Snap-on timing light. Some distributor wrenches are lost in the back of my toolbox just collecting dust and slowly rusting.

Did you guys clean and reinstall or just replaced?

Yup I miss those days too.

Clean gently with brake cleaner or some carb and choke cleaner. Don’t use a lot just enough to clean the wires on the sensor, let dry. If the MAF is actually causing it there will be part of a bug/leaf/etc... that you will be able to see stuck on the wires. Doesn’t hurt to clean it anyways. It’s just an easy thing to check/do. I’ve had 2 towed in in the last 6 months that had part of a bug stuck in the MAF.

When it does run, does it run smooth or spit and sputter? Might have to hook up a fuel gauge on it.

Pull out the choke part way, turn ignition switch on, then push down on the starter on the floor board with your foot.

Thanks Nelson. I'll check it out later this morning. When it does run for the few seconds I can't get a solid idle for more than a few seconds to tell. I noticed rpms drop low maybe around 500 before it dies

Replaced the filter nothing. Was checking mass flow sensor hand slipped and a hose slipped and fell. Then I noticed a 2nd hose was off.

What hoses are these? The 2 closest come from the intake. The bottom goes into the crankcase