What is the problem and How can I fix this problem

ford not old 2door or 4? and are not the same.
no heat? no problem told.
but the blind door is, in the cab distribution HVAC box.
the service manual covers it.
but is not easy to reach on some F150

https://www.youtube.com/watch?v=zmOlDQQXlkw

or is like this
https://youtu.be/vbyEg6YLH0o

use youtube first
see them all, most cut plastic to get to it.
shops are $1500 labor + parts. now.
so good luck.

cars are made by robots that only robots can fix. LOL

TRY OXYGEN SENSOR

I would get a can of spray throttle valve cleaner and clean the gunk off the throttle blade butterfly and also clean the idle speed control valve.

So many possibilities. I would start with tune up items, then test fuel pressure, IAC valve, coolant temp sensor, clogged exhaust or bad converter, trans converter lockup failure, vacuum leak...

Why are you stopping on a robot? Poor robot,lol. Really, just run usual tests--spark at plugs? Correct fuel pressure? Compression?

don't waste money guessing
have the fault codes read and fix the sensor fault found

x222 charging

More detail needed. Is the clutch dragging causing the engine to stall?
Does it otherwise idle OK?
Any fault codes?

General advice:
Radio interference.
Ceck alternator recharge rate.
Very low on details,u mean if in a parking lot it will iddle fine?If breaking hard won't stall?If easy break engage won't cut?
Fuel/Fuel line/fuel pump related issues.
Air mass (MAF) sensor related.
U must track the problem,more details.
Cheers,share if figured out.

Check out the related help links with solutions to troubleshoot the problem.
Click the link below:----
1990 Toyota 4Runner: Engine cuts off when reaches 2000 RPM?

http://whatisbyme.blogspot.in/2012/05/1990-toyota-4runner-engine-cuts-off.html

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Volvo 760 engine cuts off frequently while driving? http://schematicsdiagram.blogspot.in/2012/02/volvo-760-engine-cuts-off-frequently.html

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Car starts and cuts off immediately? http://repairhelpcenter.blogspot.com/2012/01/car-starts-and-cuts-off-immediately.html

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Engine cuts out at 3000 RPM? http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html

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While stop engine idles like cylinder missing? http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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These details will help.
Thanks.