Hey, I am on an access to higher education course in the UK and have come across the following problem in my workbook:

A car of weight 10780N driving at constant speed along a flat quiet road has resistive forces (friction drag etc.) of 350N acting on it, suddenly the car develops a misfire and its output drops so it now exerts a driving force of 190N. What will happen (initially) to the car? (calculation needed)

I know the car will decelerate initially as the output will be overcome by the resistive forces, but I am struggling with how to show this with a calculation.. I feel like its something very simple I'm missing but have been going round in circles for a while so any help appreciated. I'm quite new to studying physics so go easy on me please