firstly Im not your dear
back to business
the mitsi foot cam sensor is about 4000 - is located near the twin coil packs bolted with a 6mm bolt (10mm head)
The 1 and 4 is usually due to misaligned timing belt, the ECU is not seeing proper TDC, did your mechanic put it back correctly, and not mauled the crank sensor wheel in progress - he may also have put the crank sensor wheel backwards, this also causes if to get out of time, do verify that you have full 12 volts at the injector plugs with ignition on