Engine cranks but won't start

P228C, it has applied exclusively to diesel powered vehicles. It has also meant that the powertrain control module (PCM) had detected a low voltage signal from the control circuit of the electronic fuel pressure regulator, which reflected insufficient fuel pressure.

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You mean it will crank but not start ? Do you have normal compression, spark and fuel pressure ?
If the timing belt broke you won't have compression on all cylinders.

a faulty engine coolant temperature will cause vechicle to stall out during climate changing.

if you need to keep your foot on the gas to keep it running clean the throttle body and idle speed motor

I wouldn't think catalytic converter, without it giving some indication that it was going bad, but without testing it is hard to say.
When it cranks and won't start, check for battery voltage to the coil on the dark green wire, with key ON. If you have power at the coil, it might be a bad coil. If no power to the coil, it could be a Crank Position Sensor or the Cam Position Sensor inside the distributor. If one of those is bad, it can stop the computer from sending power to the coil.
Good luck.

This engine is electronically controlled so the first thing that must be done here is to have the systems control computer tested for fault codes and then do the proper diagnostics based on those codes.

If it is an electrical Fuel Pump, you will hear the pump whirring as soon as you turn the key to "ON". If you can't hear it, the fuel pump is bad. If it is a mechanical fuel pump on the engine, remove the hose that goes into the carburator. And crank the engine. It should pump the gas out without a problem. If it does not, the fuel pump is bad. Also check the relay to the fuel pump and the shutoff valve. It is more likely that it is a relay problem since it hits a bump and goes off then it carries a current again. Probably a bad relay under the hood for the fuel system.

if this a fuel injected car just check to fuel pressure first.

this engine fuel pump prassurae low. it fuel pump celan. Your problem sovel