Multiple misfire at higher rpms

[O5berylgrnrenegade]

So i have all plugs changed throttle body and iac cleaned but im getting a misfire (p0300) like its hitting a rev limiter between 3500 and 4000 rpm also noticed when shifting (6cyl 6spd) rpm sometimes wont drop right away when throttle is released and clutch is depressed to shift any ideas? Did get a crank sensor code once a month ago but hasn't returned i would like to solve this issue asap

 

[GunnerSchenck]

Perhaps one or more of the ignition coils are not seated properly. Did you feel them pop around the spark plug before tightening the nut on top of them? Or just put them in place and tighten the nut down?
Spark plugs properly gapped? Changed with NGK's??

 

[O5berylgrnrenegade]

I will double check the coils to make sure as for plugs ngk copper cores were put in a month ago gapped at .40 did have the misfire at lower rpms but cleaning the throttle body out as well as the iac smoothed low revs and idle right out

 

[O5berylgrnrenegade]

Ok coils dont all click down on plugs but are bottomed out in the plug bores

 

[JeepinJarhead03]

vacuum leak or throttle position sensor

 

[O5berylgrnrenegade]

vacuum leak or throttle position sensor

Vacum lines check out looks like ill try the tps thanks