The issue that costs you to start, you have to see if you did before changing the distribution strap, since if the pump is delayed or the belt is not well tensioned, it has the same symptoms as if it fails as heaters, that is, nod, white smoke that makes them pico their eyes, a certain laziness in the engine, etc.
To see if that is or if it is of heaters, the first thing you are going to do is remove the cable from the four heater bridge and with the help of a fat cable connected to positive to touch the nuts of the heater, if they jump sparks and notes the consumption means that it is fine, if not ... it is time to change it. You can also try a dot measuring resistance, it must be between 0.4 and 1 ohm.
If the four heater are fine, reassemble the bridge cable, start the car, check that the oil rod is maximum and go out to war To the injection cut (5200 rpm) small detonations inside the exhaust, such as flashes, (diesel that comes out without burning and burns inside the exhaust tube, sounds but you don't see the flame). That is an unequivocal symptom of bomb delay.
All the best.