Help with a 1.9d AEF engine pole

Hello. I'm hoping someone can help me. I have a 1.9L Polo with an AEF engine, and the ignition key was faulty, and the transponder was spliced ​​in. I got a new ignition key, lock cylinder, and transponder from a junkyard and reassembled everything. I also changed the timing belt, but now it won't start. I've tried stalling the engine a million times, and it's impossible to start. I don't know what else to do besides light it with a lighter and hope it burns. Any help would be greatly appreciated.

Yes. The easiest thing would be to pour gasoline on it and set it on fire. But seriously, if I were you, and you've already thoroughly checked the timing, I'd check that the transponder and the car key have the same signal. It's also possible that you have a faulty crankshaft position sensor or knock sensor. You have to consider that the transponder, key, and ignition lock might have been given to you at the junkyard from a car with the same engine code as yours. I hope this helps.

The key takes another central one that is the one following the bombin cable, but the pump electrovalve