What is keeping my car from starting?

6 months ago I was driving and my car died as if it had run out of gas, but I had olny driven 30 miles since my last fill up. It wasn't getting a spark, so I had the coil checked and the primary was bad so I changed it, but that didn't fix it. Took of the ECM and it poured oil so I replaced it, and now it's getting a spark, but not fuel. Checked the fuel pump, it's good. Replaced fuel pressure regulator, but no fuel would come out of the injectors. The injectors gave a good ohm reading so I figured they were clogged from sitting and changed them, but it still won't start. The night before it stopped running, I had the camshaft sensor changed and the wires had melted together. I fixed that problem today and replaced the sensor, but still not getting fuel to come out of the injectors. Someone suggested I change the timing belt, even though it is tight, would this keep the injectors from working properly and keep the car from getting fuel? When I spray starting fluid into the air filter, it sort of chokes on it and tries to start, but won't stay running. PLEASE HELP!