2004 Rio I am going crazy trying to get this thing to start heres the run down. Timing belt broke got a used motor took head off used motor and checked for bent valves before I put it in all were good, got motor in and it started and ran for a few mins and shut off strated right back up did this several times then would not start at all. Took coils and cam sensor off the motor that broke belt put them on and same problem wont start changed intake still same thing got 2 used crank sensors still same thing. The plugs I checked for fire they fire maybe 3 times and then stop if I turn key to off and try again they will fire 3 times and stop everytime. The fuel rail I have on now does not have a valve to check pressure if it had low fuel pressure would the ecm stop the fire to the plugs. I had a check engine light on I hooked up my obd 2 code reader it said P1800 I cleared the codes all this I did when it was starting after I cleared the code it started back up ran a few mins and then died again and thats when it would not start again could I have screwed up the ecm??? Please help me I am at my wits end.