Rough idle carb will not idle smooth loops

How long since a tuneup? Any applicable trouble codes?
The generic info for rough idle on any vehicle is to check for a leak of some kind, fuel--egr--vacuum, something of that nature.

Check your vacuum lines and be sure your throttle body is tightened down. Carb cleaner spray can be used to find the leak. Spray it around the lines and gaskets (while the engine is running). If the idle speeds up, you found the area of the vacuum leak and the solution to your problem, possibly.

When it idles rough it could be several things but, an easier thing you can do 1st is cleat the throttle body of any carbon(black stuff) with throttle body cleaner or something like carb cleaner. Ive used brake cleaner sometimes. But yea, look up your cars info about your motor and just clean all the black carbon off of anything at the throttle body and you may even need to take some of it apart to get down in there with a rag, little cleaning brush and the cleaner. Clean the thing you can move by hand called a "butterfly".

may need a good carb cleaning

There is no idle adjustment. The idle is computer controlled. It does sound like you have a vacuum leak. The most common problem for this is a bad intake gasket. When it is running ruff spray a little carb spray around the area where the intake bolts to the head. If the engine smooths out you found your problem.

Please be careful when doing this. Carb spray is flammable!

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

check the fittings at the cold start lever on the carb,it might need ajusting,if air filter is chocked it will run rough,

I don't know the year model, if older carb, sounds like stuck choke, bad choke pull off or bad needle and seat in carb. If newer model, computer staying in closed loop, bad temperature sensor.

CHECK FOR A LEAKING INTAKE MANIFOLD GASKET, USE A CAN OF CARB SPRAY AND SPRAY AROUND THE TOP OF THE ENGINE, IF U HIT ON A LEAK U WILL HEAR THE ENG CHANGE TONE AND IDLE RPM.

sounds like u need to do a tune up on it. clean the carb, new plug

My first guess would be a dirty carb/fuel injector set. Run some fuel cleaner through the tank and see if it gets better. You might have to do it through a couple of tanksful. How long since you've had a tune-up? It might just be that time.