I have h2 in my workshop is missfiring. i changed the plugs but still missing i cleaned the valves but still missing i changed the fuel pump but still missing what could the problem?

Sir, your question is not very clear, but I will still try to post a solution here. Engine missing could be due to any problem in fuel system, ignition system, engine or ECM as well.

LOW ENGINE IDLE SPEED (Poor idling):
-Throttle body (do the cleaning and idle speed learning)
-A /C signal circuit
-Fuel pump control circuit
-Fuel pump
-Intake system
-P C V valve (clogged or open) and hose

ROUGH IDLING:
-Cylinder Compression
-Ignition system (Igniters, spark plugs, wiring harness)
-Spark plug fouled, gap too wide or too short. (1.00-1.1 mm)
-Fuel injector circuit
-E C M power source circuit
-Fuel pump control circuit
-Fuel pump (required pressure 44 psi - 49 psi)
-Throttle body (cleaning)
-Intake system
-P C V valve and hose
-Air fuel ratio sensor
-Heated oxygen s ens or
-Mass air flow meter
-Idle hunting
-Throttle body
-Intake system
-P C V valve and hose
-Air fuel ratio sensor
-Mass air flow meter

HESITATION/ POOR ACCELERATION:
-Fuel pump control circuit
-Fuel pump
-Spark plug
-Ignition system
-Fuel injector circuit
-E C M power source circuit
-Mass air flow meter
-Throttle body (do cleaning)
-Intake system
-Valve timing
-Cylinder Compression

move the ignition coil to another cylinder and see if the miss fire moves. If so replace that ignition coil. If the miss fire stays on that cylinder it is more likely the fuel injector. Was their carbon on the spark plugs when you removed them? This is indicative that the fuel injector is gummed up.

possibly wiring harness fault,sesor wheel installed backwards or an even fire/odd fire engine mismatched components

Pull the code. It will either be a P0301 P0302 P0303 etc. all the way to a P0308. This code means that you have a missfire and the last number is the cylinder with the miss. Get the code and then change the coil for that cylinder. While your there pull the plug and I gurantee that you need plugs after you see the condition of the plug. Then at that point pull all the plugs and replace. But these Fords are known for having bad coils. Each cylinder has it's own.

two things bad idle air control valve,and the missfire is most likely an injector you can unplug there connectors one at a time to see which one after fixing you will need to clear eng codes any auto parts can do this

You either have another bad COP Coil and possibly
#5 wasn't bad either,or other issues

Check for vacuum leaks

If the O2 Sensors have 100,000 miles
change the front 2 only, with OEM,not a
cut and splice thing. NAPA can order them

Disconnect the vacuum hoses to the EGR Valve,
plug and drive a couple of days,to see if it is the issue.

Clean the MAF with CRC MAF Cleaner
Clean Throttle Plate with CRC Throttle Body Cleaner

Check fuel pressure at fitting on fuel rail with a gauge

What codes do you have?
Who is doing the work on your veh?

was the fuel filter changed. and you should also check plugs and wires.for a missfire problem. if you dont get proper spark to plugs, it will misfire and be sluggish. have a good day !!

It sounds like fuel starved at higher speeds. i would change the fuel filter first if this does'nt help check the fuel pressure

check intake for vaccum leaks,the gasket also and egr valve, thats alot of parts to have replaced without diagnosing first, if there are no fuel leaks and you said all injectors were replaced then you have a defective fuel pump, also these engines had misfire problem because of dirty injector but you replaced them so count that out. good luck.

Do you have a check engine light? Does the tach jump when it misses?