main engine relay should be replaced with fuel pump relay. Are you sure your fuel filter is not plugged.
If your car is cranking fast, but not starting it is either fuel or fire, so check the plugs to make shure they are getting spark, if they are it is probully the fuel pump or filter.
i had the same problem but it was my fuel pump. have you replaced the fuel filter also?
You will need a simple inexpensive tool to disconnect the lines from the filter. Your local auto parts store will have the tools you need. Warning! The fuel system will be under pressure. Before disconnecting the fuel lines from the filter, remove the fuse and/or relay for the fuel pump, then try to start and run the engine until it runs out of fuel. The pressure will be greatly reduced when you disconnect the lines from the filter. Be prepared for some fuel loss. Replace the fuse and/or relay only after the filter is replaced and reconnected. Run engine and check for leaks.
battery, solenoid/starter or relay or even ignition switch
fuel pump relay, fuel pump, fuel filter, mass airflow sensor, iac valve
i replaced the fuel filter and fuel pump relay. the pump runs for 2-3 seconds when key is turned. after cranking for awile, pump runs for 10-15 seconds after key is turned off. sputters a bit when sprayed w/starting fluid. it is probly your fuel injectors. get them tested.
are you getting fuel past the fuel filter. do you have spark at the spark plugs
Does key have a resistor built in?
Bad fuel pump, fuel pump relay, blown fuse, or loose connections.
It could be the fuel pump, fuel filter, alternator, or the relay switch.
If you have power to the plug, and the relay is is replaced, did you check the GROUND?
The fuel pump relay has a secondary control circuit operated by the computer. Upon cranking the oil presuure has to reach 20+ psi befor the computer singals the distributor to fire and the fuel pump to kick in.