99 f250 7.3......has been running rough mid throttle, yesterday on the highway it died but started back up before i could get pulled over,today it shut off and stated it back up and made it home...i have already changed the cps,fuel filter,air filter oil....check engine light has not come on

Hi Russell:
I'd start by looking for a vacuum leak, often associated with the PVC valve. Make sure the PVC valve is not obstructed. Possible dirty air filter.
How long since regular Preventive maintenance was done?
Cheers

Well black smoke is a rich fuel mixture. So it may be getting too much fuel or not enough air.
Is the check engine light on ?

you may need to get your fuel filter replaced

change your fuel filter ..your vehicle will run but your fuel pressure is weak ..also after this clean your fuel injectors by pouring injection cleaner in your gas ,,it will correct itself..Also ,,if none of what I stated works ,,Spark plugs and new spark plug wires needed ,,Lastly your fuel pump

run fault codes and look for a fuel supply sensor/servo failure. The heat is affecting the fuel system and is causing a fuel vapour lock or is over pressuring the injectors.

well i'd call the basterd and ask him what he wants to do about it , or take him to court as he did not disclose these problems. Or did he? I would check the fuel system for leaks which causes engine to get air and less fuel than it requires or check tank for leak and also check motor for bad vacuum lines and intake gaskets. spark plugs check.

yes big time ,i think the timing belt wasnt refitted correctly or something because now i think the valves have hit the pistons ,

clean the throttle body most common cause of idle/decel die off. its cheap and real cheap and easy to do yourself

Check spark to plugs. Possible crankshaft position sensor. Located at rear of engine between engine and trans.

If it runs down highway fine, but just stalls when off throttle, turning, heater on, etc., I'd pull I.A.C. motor off and clean with throttle body cleaner & retry it. Clean port it came out of at same time too. if it cures it even temporarily, and does it again, replace IAC motor.