UK Car Repair Questions? Ask a Mechanic for Answers ASAP
its worth checking that the electric pump that feeds the main fuel pump is working correctly, it shouldrun for a few seconds then switch off when you first turn the ignition on. If the connections to this are corroded or damaged then the pump could stop at anytime. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubt and do the same for the fuse,ideally measure the voltage at the pump and check its getting 12V
in that case it may have developedan air leak on the fuel supply pipe from the tank to the engine. If a leak has developed on the fuel suction pipe then air entering the system will air lock the pump.Try pumping up the fuel using the hand pump in the engine bay on the filterhousing, then crack off / loosen each injector pipe in turn while cranking the engine and getting an assistant to operate the primer. This will expel air from the injection side and the engine should fire up. The problem will be cured by checking the supply pipe along its length for signs of leakage and repairing any you find.
If you daub each pipe joint with heavy grease and the issue goes away then wipe the grease away one at a time to highlight the problem joint
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the other thing that would be worth checking is the state of the pickup pipe inside the tank, any issues or blockages here will also give the issue you describe
you should be able to acess this by lifting the back seat cushion and removing the access plate
ok that P1633 code is a faulty throttle / air flap which I'm not sure if your car has or not?
but the P1228 points to a common fault with the SCV valves that control the flow of fuel into the pump