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My first guess would be that your fuel pump has died. This is evident buy having no pressure at fuel rail. Check this way, put key in ignition and turn to on, if you hear a whurrrrr noise in back of car your pump is good, if not change the pump. I am assuming all was working before. GOOD LUCK FRIEND.
FIRST NEED TO RELIEF FUEL PRESSURE REMOVE GAS CAP RELIEF GAS PRESSURE IN FUEL TANK.THEN REMOVE FUEL PUMP RELAY THEN START ENGINE UNTIL IT DIES LACK OF FUEL,CRANK ENGINE OVER FEW MORE TIMES MAKE SURE FUEL OUT OF FUEL LINES. THEN YOU NEED TO REMOVE AIR CLEANER CROSS OVER TUBE ABOVE FUEL RAILS. DISCONNECT LINES AT THE ENDS OF THE FUELS RAILS ASSEMBLY. MARK AND DISCONNECT THE FUEL INJECTOR WIRE HARNESS CONNECTORS. REMOVE THE FUEL RAIL RETAINING BOLTS, DISCONNECT THE VACUUM LINE FROM THE FUEL PRESSURE REGULATOR. REMOVE THE FUEL RAIL ASSEMBLY FROM THE ENGINE. IF YOU HAVE AUTOMATIC TRANSMISSION REMOVE THE THROTTLE PRESSURE CABLE AND BRACKET TO REMOVE THE FUEL RAIL ASSEMBLY.TO REMOVE FUEL INJECTORS JUST REMOVE CLIPS THAT RETAIN FUEL INJECTORS IN FUEL RAIL. BESURE GO TO DEALERSHIP BUY NEW FUEL INJECTORS O - RINGS.APPLY A SMALL AMOUNT OF ENGINE OIL TO THE O - RINGS TO AID IN INSTALLATION. TORQUE FUEL RAIL BOLTS TO 100 INCH LBS.
You might have a crimp in the line between the filter and the rail ... or there might be a problem with the fuel rail itself. Best way to test for this is to detach the fuel rail from the line (like you did at the filter) and see if the gas is making it that far. If you have someone crank the engine for you while you have the fuel rail detached, the fuel pump should cause gas to come out of the line -- if this does not happen, the problem is with the line between the filter and the rail. If it is still working at the end of the line attached to the rail, you might have a blockage in the rail or faulty injectors.
If you are going to do all of the work yourself, I recommend a Haynes manual -- it will give you a list of problems that are common to your year, make and model with solutions, as well as directions and pictures / diagrams to make sure you are doing the work right.
Have you checked your fuel pressure regulator? I have a 98 camaro and i had the same problem. I checked the fuel pressure regulator and i found that one of the lines was cracked and was leaking. I took it out, replaced it and now it starts up everytime. I found mine on the back of the fuel rail near the firewall
course they do, they want loads of profit from a 10c part.go to a plumbers with the seal and almost certainly you will get one for pennies...washers for gas appliances are gasoline proof.(buy a spare for later.......)
Well its easy to check find the regulator on the fuel rair next remove the vacuum line and see if there is any gas in te line if not have some one start the car if the regulator starts leaking gas out its shot. Its a easy repair take the vacuum line off loosen the big nut on the regulator and remove the smaller hold down bolt now becarefull at this point the fuel rair is under hight pressure so put a rag over the regulator or put on some safety glasses and start to wiggle or pry the regulator from the fuel rail. When u get it out match it up to the new one and make sure all the old o rings are removed from th fuel rail put the new one in start the car and check it for leaks.