2002 hyundai sonata GLS v6

current repair list-
-new plugs
-new wires
-new timing belt
-compression test -all fine
-fuel pressure check- all fine
-coils check and all will throw a strong spark 2 inches long
-new maf
-tbs back probed and check -all fine
-vacuum leak checked and all fine
-new battery

symptoms and codes
-misfire cylinder 4 and 6 plus random mis
-car idles fine and revs fine until 1800-2200 rpm anything above or below is fine
-car only misses in gear moving down the road, i can feel it buck and mis
-also car wont start on first key turn no matter how long i let it crank but if i turn key on all the way off and back on it start no problem
-wot from stop car accelorates fine until the mis range then it falls on its face but picks right back up once the rpms go above 2200

im really at a loss here hopfully some can help

 

Did you check the Crankshaft Position sensor? Or Camshaft Position sensor?

Just thinking out loud ...
If it was mechanical then it should be fairly consistent through out the rpms?
A sticky valve wouldn't be sticky in a range of rpms .. would it?

Oh, there is the balancer ... but, I don't know if it concerns your vehicle
Here's the video

So, I am thinking electronic sensor
Maybe take the cam sensor out and inspect the teeth the sensor is using
Make sure they are all there and clean?
Is the sensor good?

Well, sorry, if this doesn't help at all.
Just thinking out loud

 

ok so update...

upon further testing i.e. pulling fuel rails and watching injectors I notice cylinder 4 and 6 not spraying they were plugged up and dirty so i used a home made cleaner and got them spraying like they are supposed to. after that car ran smooth as silk for about a mile. now the only code i get is for cylinder 4, so i did some more cleaning now i believe the fault not to be on the injector because it works beautifully on my test bench. so here is what i got, i clear the codes and car runs fine for a bit i put a test light on injector 4's harness plug and notice when the check engine light comes on the injector quits getting the signal to fire ( plug is still on injector just back probed) so my question is what could cause the ecu to quit sending a signal to a single injector

 

Loading down the circuit would bring the voltage down
example would be the voltage would drop when cranking the starter motor

Maybe check the voltage coming out of the ECU and then compare it with the voltage at the injectors
If they are different then maybe something else is pulling the voltage down
Also, you can check the resistance of each injector and see if they are within spec.

 

voltage to all injectors are identical but new discovery!! the problem only occurs when the computer does the on board diagnostic. did a hard reset and no problems for 3 trips that's when it does its scan. i'm thinking that the computer is reading a phantom misfire and shutting off fuel to the cylinder if that's even possible.. i say phantom misfire because i know for a fact that fire is getting to the cylinder

 

Sorry, I don't know anything about phantom misfires.
Hope you can find someone else who knows more