Manual or auto oh?

Never tell wat tranny how to know wat problem?

CVT?

Did you engage R soon after starting the engine? did you wait 30secs - 1 minute for it to warm up?

Then fook it, I'll just collect from you and DIY at home.
Not quite sure what you mean, you mean the car has already warmed up?

 

Then it can't be help I guess. All I can suggest is to wait for the RPM to stabilize after shifting into R, then only press the throttle. For some reason the CVT's R gear is finicky.

1)Idling speed too low
2)Vacuum instability(if there is a vacuum hose,could be leak/disconnected)
3)Wrong petrol(result in retarded ignition)
4)Low combustian pressure. Gasket leak(ever overheat your engine before? Check the rocker cover surrounding see whether greassy or dry)

Last thing u can check is whether it makes a different with/without aircond. If without aircond no such problem, then its loosen throttlebody result in vacuum leak.

Regardless of your finding, you're advise to go back SC to rectify unless your warranty ady void.

Someone mentioned the CVT engages a set of planetary gears for R, maybe the gears causes slightly extra load for the engine that the ECU did not account for.

Just a theory, though.

I'm also getting this problem when i get my car for the 1st 2 week. But, it only happen once. After that nothing happen but, the R really weird for the Saga FLX compare to previous car i drove.