Aver the upper dead point is when the piston is just in the explosion phase, depending on your ignition order it can be the 1 or four, the injection pump brings marks and depending on your pump, they may all injected together or sequentially the pump must be as a tooth before performing the injection, when the engine is translated eventually in some of its points the marks will cross the marks. The pump in the PMS will be injecting but you must find out if it injects into one or 4 that determines and looking at, if you have everything disarmed, look that the brands exist, there are peugeotes who have the mark in the inertia steering wheel and can be locked with a screwdriver or llava Allen have a hole where he gets looking for this before doing anything