Fuel injectors have power for about 5 cranks then go dead
I've got a 90 pontiac grand prix. It will fire then die. we put a tester on a fuel injector and it lights up for about five cranks then there is no power to the injector. The test light starts out bright and gets dimmer with each crank of the engine.
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Sounds like a bad fuel injector. Back in the day we would let them runout in the parking lot and when they stalled we would rip off the intake plenum as fast as possible and ohm check the injectors. They should be around 13 ohms. If they are significantly less, say 3 ohms, than those injectors are bad. This system bank fires the injectors. Meaning that all three injectors on the front back fire at the same time and all three of the injectors on the back bank fire at the same time. If one injector hoes bad it will shut down the whole bank which will stall the engine.
Good fuel pressure, but none to the cylinders? Check the injector circuit. All injectors will have battery voltage to them with the key on. A "noid light" can be used to check both power and ground. The light should be blinking when the engine is cranked. Noid lights are cheap, and just plug into an injector connector. If it blinks with the engine cranking over, the circuit is good-both power and ground.
No injector pulse at injectors: a) check fuses b) use scan tool to read RPM at PCM while cranking. Ask question specifying RPM PID data. c) crank sensor/cam sensor/ign. module/wiring fault d) stuff not plugged in properly 4) check fuses 5) dead PCM note PCM pulses injector ground based on sensor input, power is constant from ignition how are you testing injectors theres something called a noid light auto parts store let you use them free you have to test it on the injector itself what did you car do before it died does it turn over but not start
If its injection you need to test light injector leads and see if you are getting fire there. There also should be fuses for the injectors too, there is a fuse box under hood wear them fuses are located.