I was given a 1990 Honda Civic STD 3 door Hatchback which was parked for 5 years. I replaced the gas tank, fuel pump, float & com plete tune-up. Car doesn

were the injectors cleaned or replaced? I'd start there.

Also you maybe wana change engine oil and it's filter to prevent any damage could happen due fraction... Also you should check the sensors for air filter ( the once on the tube between the filter and the engine)

A car sitting for this length of time will need a thorough going over. Sounds like you have a good start so far. Go back to the basics on this one. First pull a plug and check for spark. If you have good spark check for fuel pressure. If you have both you should be running and be able to tune it up and get it running smoothly. The following is a test for the fuel pump....... You should first see if the pump is operating at all. Under the hood you will find the fuel filter attached to the firewall on the passenger side. To avoid a spark igniting any spilled fuel, disconnect the negative battery cable before working on the fuel lines. Carefully remove the fuel line from the inlet side of the fuel filter. If the fuel pump is working this could be under pressure so have a rag around the fuel line to catch any spilled fuel. Use a 12mm open wrench, loosen the inlet line a couple of turns and allow any pressure to blead off and be caught by the rag. When pressure in the line is released completely loosen the bolt and disconnect the line. Once the fuel line is disconnected put the end of the fuel line in a container. Reconnect the negative cable. Turn on the ignition key and observe to see if any fuel is flowing into your container. You only need to check this for a few seconds so once you've determined there's fuel, turn off the ignition. If there is no fuel flow it's time to move on to the next step of troubleshooting. If you do have fuel coming out of that line you next need to check the fuel pressure. Attach the pressure gauge to the end of the fuel line, turn the ignition back on and check the pressure. The pressure reading should be around 30psi. If there is fuel flowing but it is significantly below 30psi, it's quite certain that you will need to replace the fuel pump. If the fuel pressure is correct then the problem is probably your fuel filter and you won't need a new fuel pump. If there is no fuel at all coming out of the fuel line then you will need to do some additional troubleshooting. Since you need to have the pressure out of the fuel line to replace the pump, go ahead and leave this disconnected for now. On the 1990 Civic there should be an access panel to the fuel pump connections under the rear seat on a hatchback or in the trunk on a sedan. You can't get to the fuel pump to replace it from here but you can perform the next step in your troubleshooting. Identify the wire leading to the fuel pump on the top of the fuel tank. With your meter connect the red probe to that wire and the black probe to a bare metal spot anywhere on the car. Turn on the ignition and see if there is a voltage reading of around 12 volts at that wire. If the voltage doesn't read 12volts or more the problem is either in the wiring, the fuel pump relay or a blown fuse, and you may not need to replace your fuel pump. Fuse number 23, a 15 amp blade fuse, in the fuse box under the dash is for the fuel pump. Pull that fuse and inspect it to see if it's blown. If its, replace it and see if the fuel pump comes on when you turn on the ignition. If the fuse is good, or the fuel pump still doesn't work, the problem might be the relay. The relay is located under the steering wheel on the far right, near the fuse box. This relay isn't cheap so you should test the relay before replacing it. Looking at the blade connections on the relay with the tab up, the connections are numbered; 1 lower right, 2 upper right, 3 lower next to 1, and so on to 7 lower left and 8 upper left. Using some pieces of wire, preferably with alligator clips on each end, connect number 1 to the positive terminal on the battery and number 2 to the negative terminal on the batter. Check for resistance across number 5 and number 7 with your meter. If the resistance is high the relay is bad. Replace the relay and check again to see if the fuel pump works. If it still doesn't work, check the voltage to the pump again. If you don't have voltage, you most likely have a wiring problem between the relay and the fuel pump. If you do have voltage there, it's time to replace the fuel pump. A lot of stuff here, but hope this helps get your car going. Repost if you have ignition trouble. Good luck.

if your not getting fuel check the main relay and the fuel pump. hondas hate to sit.