[admantis]

You're using SetTimer, and not SetTimeEx.

pawn Код:

SetTimer("StartEngine", 2000, false);

With SetTimer, you can't pass extra parameters, watch this code:

pawn Код:

public StartEngine(const playerid)

StartEngine has 1 parameter which is "playerid" but can't be passed because you're using SetTimer, however, if you did this:

pawn Код:

SetTimerEx("StartingEngine", 2000, false, "d", playerid);

First you put the specifiers to know how many parameters you want to pass, and their type, then list them.
You could even do this:

pawn Код:

SetTimerEx("StartEngine", 2000, false, "dd", playerid, vehicleid);

This is how you do it with multiple parameters.

For future reference, you don't have to use the 'const' keyword in this situation, as it becomes a read-only variable that can't be altered by the program after initialised, at least in C / C++.