I have replaced everything I could think of that would have anything to do with the car running. New battery, fuel pump, fuel filter, pgmfi main relay (twice), coil, igniter (ignition module), complete ignition switch, all fuses checked were good but replaced anyway, known good distributor, distributor cap, rotor button, spark plugs, plug wires. The alternator, starter, timing belt and tension-er, all seals and gaskets, tie rod ends, steering rack, front wheel bearings, rotors, brake pads and shoes, lug studs, radiator, all hoses, belts, CV axles, engines mounts, and other stuff I cannot think of right now were changed prior to the engine dying.
What I have determined is, either the old computer quit working while the car was running, and the new computer was bad to start with, or a wire that controls the fuel pump signal and the fuel injector signal has quit.
I have spark at the spark plugs. The main relay does not click when the ignition switch is turned on. I jumper wired the main relay pins 1-3-5-7 and 2-8 with the relay plugged in and unplugged. The fuel pump will come on. I can hear the pump humming and can hear fuel flowing through the fuel return line under hood. The yellow/black wire at the fuel injectors get power (these things occur only while jumpered). Without jumper wires I am getting battery volts at the main relay pin #s 1, 3, 5, 8, and #6 (8.69 volts while cranking). The check engine light stays on when pump is off. It goes out when pump is on, only while jumper wired. I checked for power at the other wire at the injectors with a test light, while jumpered, and they do not get power. Switch on, and while cranking. No flash of the test light. I read somewhere on the net that possibly the ECM is not grounding pin #8 at the main relay. Pin #7 at the main relay doesn't have power unless jumpered. The engine turns over but will not run because the injectors will not do their thing. I do not have a field service manual. (I know I need one for testing). I do have a Haynes manual but it does not go in depth for test procedures for this.
Why will the ECM not ground the other wire at the fuel injectors?
I also cleaned and tightened the ground connection at the thermostat housing.
What am I missing?
have the same problem?
Wednesday, August 8th, 2018 AT 8:13 AM