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.
If the vacuum modulator valve is not replaced, the vehicle may experience engine stalling while idle, failure of an emission test, high levels of nitrous oxide emissions due to fluid being pulled into the engine, surging at highway speeds, an excessive or non-functioning EGR valve, hesitation while shifting gears if the car is automatic, and illumination of the check engine light.