I have a 99 F250 V10 That sounds like it miss or something not throw any codes, I replace some coils and all the boots but it still doing it

Any thoughts

oh it only does about 1500rpm in gear and don't do it idle

 

Come cause for high or eratic idle is the IAC. (idle air control) As for the misfire, when was the last time the spark plugs were changed?

 

about 300 mile ago
it does most going down the road when pull a hill and it don't have to be a big hill any hill does it bad

 

What brand of plugs are in it?
If they're not Motorcraft or Autolite it's time to change them again. Ford modular engines don't run well with other than Motorcraft or Autolite.

 

don't remember i will change them and try it again Thanks

 

they have motorcraft in it so now what the new ideas

 

Check the connectors on top of the injectors, when we did the spark plugs on my brother in laws truck after spiting a plug, he or I bumped a connector on top of one of them didnt think anything about it. Went out for a drive after the plug change and had a miss. The clip that locks the connector down on the injector broke and that caused the miss by not firing the injector. Just something to check. Ended up zip tying it down.(redneck) Good luck and let us know what it was when you find it.