I got a 13i ford bantam rocam engine the vichle start and idle but cuts out as soon as I accelerate

Ideally you need a Workshop Manual. Help here

https://www.google.com/search?q=Ford+Bantam+1.6+Rocam.+Crankshaft+torque+settings

Service manual

https://www.google.com/search?q=Ford+Bantam+1.6+Rocam+service+manual

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They may need adjusting. It appears to have NON-Hydraulic lifters according to this.

https://www.fixya.com/cars/t17134982-valve_clearance_mesurements_ford_bantam

and automatic according to this!

https://www.fixya.com/cars/t25689314-valve_clearance_settings_ford_bantam

Take the cover off and look.

https://www.google.com/search?q=ford+bantam+rocam+engine+1300+valve+lifter+adjust

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Internal engine problems could just be valve seals leaking oil into the combustion chamber pull out the spark plugs and look at them if they are covered in oil and the firing pin and electrode are bridging together then it's your rings or head gasket and the truck is smoking a lot ///if you just see plugs that look tan/white ash build up its the seals and it smokes a little after idling and then you accelerate and it disappears and then starts again after idling you will see light blue colored smoke but not clouds of it just a slight haze in the exhaust

Clean the throttle and check for any blocked or leaks in hoses.

its one spark plug not working....check all of them and also clean current cables.....

What kind of engine is this? We do not have this model in the USA so hard to find fixes for them.

It is plugged into the transmission where the speedo cable would go in older cars.

same engine, same year only difference is bore size so there is every chance that it will fit.

bantam?
most cars, MPI injection the injector form a sandwich.
between the fuel rail, and the intake front tunnel tubes.
so remove the rail,
step s
remove battery neg lug, so some, odd person dont try to start car.
depressurize the fuel system per FSM.
then remove injector conn plugs.
the unbolt rail. bingo.

the FSM covers this, ask ford parts counter for this book.

The Ford Bantam is a coupe utility vehicle ("bakkie", "pickup", or "ute") produced by the Ford Motor Company in South Africa. It spanned into three different models and was produced in South Africa for the local market.

be safe.

I had a similar problem: engine idling at 2000 rpm. The internet suggested that it might be leak in the inlet manifold (or vacuum system, as some people call it). When idling I could hear a hissing sound. It turns out the inlet system itself is fine, but two hoses that run from the engine block to the top of the valve cover have worn through and was leaking: the moment I plugged the hole with my thumb the revs went down. These hoses draws air through the crankcase to the inlet manifold, to prevent the air in the crankcase from polluting the atmosphere.