84 se: floods when trying to start (Page 1/1) AfterThought APR 22, 12:47 PM Hello guys and gals! I am new here, landlord had a fiero on one of his properties CAR: 1984 fiero se 2.5L iron duke PROBLEM: When trying to start the car the single injector is pouring fuel out like its basically on all the time and floods the engine immediately. BACKROUND: When first looking at car the tbi, distributor, and coil were in the trunk. I rebuild the distributor, tbi, and put in a new coil. All new parts (throttle position, idle air, injector, pickup, ignition module) and then bolted them on. I have not yet put the air cleaner on yet. And I did not replace pressure regulator diaphragm, it looked okay. WHAT I'VE TRIED: I've tried putting the throttle to full as I crank to see if the flood cleaning mode works and it did nothing. Disconnected injector, still poured fuel. MISSING MAP SENSOR: The map sensor was also sitting in the trunk with the connector still attached, looks like someone snipped it. I cannot for the life of me find the wires I'm the engine bay for it, would anyone of you smart people know where to look? The car shooooould at least start without this sensor correct? UNKNOWN CONNECTOR: I have a connector that is unplugged near bottom left of engine right next to distributor and coil, it has 4 pins. See picture. Thought this was for map but that is a 3 pin SENSORS: I have never worked on gm before here is the list of sensors I believe thr car has related to air fuel ratio. If I am mission one please let me know Throttle position Idle air Ignition module Map sensor Is there an air temp sensor? I can't seem to find one. Is there a crank position sensor? Or does the ignition moduel in the distributor handle it. Any help or diagnostics would be greatly appreciated. There is not a whole Lotta info on the internet about the 2.5. It's all talking about the v6. AfterThought APR 22, 12:58 PM I should add I tested injector, it clicked when applying voltage, seems good. olejoedad APR 22, 01:08 PM The injector has 12v power continuously with key ON. The ECU grounds the injector to fire it. I would check for a short to ground in the wiring between ECU and injector. (Unplug the plugs on the ECU to do this check.) If there is no short to ground with the ECU plugs unplugged from the ECU, find a known good ECU and try that. The ECU must have the same service number as the existing ECU. AfterThought APR 25, 08:31 PM Found the issue! I had forgot to put the o ring on the fuel injector. Make sure you check for this o ring!!!!