5.9 misses at cruse speed idles normal no water in fuel put injector cleaner in

What I've seen done to test an injector is to pull it, and swap it for another cylinder. If the miss moves, then the injector is bad. If the miss stays on #5, then the problem isn't the injector.

It could be a fuel problem, but in most cases the rough running would continue at road speed.
You could certainly change the fuel filter and see what happens.
A rough idle but no problems on the road would point to a vac problem or maybe a burnt valve. A fuel or ignition problem would be at most speeds including when you put the engine under a load.
Its possible to have a faulty injector on one cylinder that is bad enough to cause a miss at idle but smooth out on the road, but that is a rare occurance.

try adding a bottle of heet water remover into the gas tank , this will help dilute the fuel injector cleaner.

A few possibilities are worn engine mounts (the rubber mounts that take away engine movement and vibration).....or rough engine idle ( maybe poor compression in one or more cylinders or other factors)....or maybe the engine idle speed is too low (typically 700 to 1000 rpm is normal depending on if AC is running which takes up more rpm) Alex

Hi,
I'm assuming you added fuel injector cleaner to your fuel tank rather than using a direct pressure cleaner through your fuel injectors.
When a solvent/cleaner product is added to your fuel tank, carbonaceous deposits (basically the dirt and gunk accumulated over years) are flushed through the fuel system. This can cause major problems if the contaminants manage to enter your fuel pump and make their way past the seals. This can and has damaged good fuel pumps. Downstream of the pump is the fuel filter - once deposits reach the fuel filter, they may block it and reduce fuel flow. The next major problem areas are the injectors themselves (rather sensitive to dirty fuel) and the engine.
Fuel injector cleaner is not a product I would recommend using. Many major car manufacturer's have recently issued memos to repairers blacklisting the use of cleaner products due to the downstream damage that may potentially be caused by them.
You should replace your fuel filter once you've finished using the tank of injector cleaner. This is most likely the problem (and could have probably used a replacement anyway). I hope this solves your problem. Otherwise you should check your fuel line pressure to ensure the pump is supplying what is required. Failing this, your injectors are probably the next most likely culprit. By this stage, things are starting to get expensive so lets hope the problem is just a blocked filter!
On a related side note; pressure cleaning an engine can sometimes cause water and soap to push down beside the spark plugs in a spark ignition engine. Sometimes this will cause the engine to run a little rough until the heat of combustion burns the contaminants away.
Hope this helps, Sherwin

TURN OFF RADIO FIRST.REMOVE NEGATIVE BATTERY CABLE FOR A MINUTE OR TWO.RECONNECT NEGATIVE BATTERY.CRANK CAR UP LET IDLE TO GET OPERATING TEMPERATURE FIRST DONT ACCELERATE ENGINE.GIVE ENGINE TIME TO RECOGNIZE THE NEW TPS SENSOR.IF CAR STILL MISS REPLACE FUEL FILTER.CLEAN FUEL INJECTORS WITH A BOTTLE OF FUEL INJECTOR CLEANER BY POURING IT IN A FULL TANK OF GAS.DRIVE CAR AROUND SO CLEANER CAN FLUSH OUT THE INJECTORS.

Check disconected vacumm line hose,
clean EGR.
change spark plugs do a tune up.Increase idling speed.
Put a can of fuel cleaner injector cleaner into the fuel. Then put another one the next day after driving for 100 km.
Vitally

do a compression before you do any thing else i think that may clarify things youdoit

This should set a check engine light. If it did, then get the codes scanned. If it was not severe enough to set a light, then you may have injectors sticking.

yes it is possible but check fuel .press. and possibly fuel filter if it hasnt been changed. but most likly going to be fuel pump problem.