[DhanZ]

How To Start Engine With Key N
This Is Command:
if(strcmp(cmd, "/engine", true)

[Flake.]

https://sampwiki.blast.hk/wiki/OnPlayerKeyStateChange

that should help you, there are some examples further down the page.

[Luicy.]

PHP код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys) {
    if((newkeys & KEY_NO) && !(oldkeys & KEY_NO)) {
        if (IsPlayerInAnyVehicle(playerid)) {
            new engine, lights, alarm, doors, bonnet, boot, objective;
            GetVehicleParamsEx(GetPlayerVehicleID(playerid), engine, lights, alarm, doors, bonnet, boot, objective);
            SetVehicleParamsEx(GetPlayerVehicleID(playerid), !engine, lights, alarm, doors, bonnet, boot, objective);
        }
    }
    return 1;
} 


Next time, don't post something like this. You made a request, this should've been a reply to; https://sampforum.blast.hk/showthread.php?tid=447813