L is a low gear ,and if u put it to the L position the car will stop in this low gear. but wen you put it in D then it will go up through the gears. Anonymous Â· 8 years ago 1
An engine that hesitates, stumbles or misfires when accelerating or when it is under load, is an engine that is either sucking too much air, not getting enough fuel, or misfiring. If the Check Engine Light comes on, you may find any of the following codes: P0171, P0174 Lean fuel condition codes.
When an engine is idling, it means that it is under no load (apart from its own internal friction of mechanics, i.e. the crankshaft etc.). Otherwise the engine is doing no work. A this point, making an engine idle is quite difficult and this idle speed needs to be controlled otherwise it will simply stall. On modern engines with a EMU (Engine Management Unit), a idle speed control valve (ISCV) is utilised to do this task.