![]() Once you accept this you can move on otherwise you will be struggling to accept other instructions to follow. The fuel pump does not stay running with the ignition ON. ![]() The engine computer runs the fuel pump for only 2-3 seconds then shuts off the fuel pump, period. I'll repeat it again simply turn the ignition key to the ON/RUN position and listen for the faint hum/hiss of the fuel pump running for 2-3 seconds before the engine computer shuts it off. The whole point of post #2 is to use what's there in the car wiring, power, relays and engine computer to run the fuel test as if it were going to run the engine. I'm not sure why you insist on the pump not working because you aren't familiar with EFI systems using the existing wiring and engine computer to do all the work for you while troubleshooting. No, nothing just posted helps as its all speculation except for verifying that the pump itself runs when powered outside and separate from the wiring. Reply with your observations for the fuel test in post #2. As long as the security indictor is OFF during start-up, the fuel pump should run. The only way fuel will not be injected is when the factory security system is flashing in the speedometer while starting the fuel pump is disabled as the simplest anti-theft system since a dead fuel pump won't allow any fuel injected engine to run. #2003 SATURN VUE INJECTOR REPLACMENT 3.0 VIDEO CODE#Obsessing on the error code is distracting you from detailed troubleshooting that was suggested short of towing the car to GM. When isolating a problem there are only two main issues either its fuel or ignition related. Its been done many times successfully and for other models as the electronic fuel injection systems are the same for virtually every model for every car manufactured the world over. The fuel test suggested is the most accurate and positive feedback possible before resorting to dropping the fuel tank. Removing the fuel pump to test it is something I will absolutely refuse to do before exhausting every avenue to check the fuel system wiring and parts that make the pump run, including the pump ground wire. Please review post #2 again as it doesn't get any simpler to check the fuel system operation. Its a transmission related issue and may be a false error, a red herring. Crank the engine all day without it ever firing up. ![]() No cps output while the engine turns over = no fuel pump operation, no ignition for spark, and no injector pulses. The cps provides the crucial timing signals to turn on the engine computer the ecm uses the timing signals to turn on the fuel pump, initialize the ignition system for spark, and pulse the injectors. An open reading would mean failure, replace it. Its mounted next to the oil filter and can be measured for resistance between 700-1200 ohms. You can cycle the ignition ON as many times as needed to listen for pump sounds just wait 30- seconds between cycles.įor testing ignition this is harder to check because of our wireless spark plugs and inaccessibility to them without removing many parts to perform a spark test so we have to try testing the heart of the fuel injection system, the crank position sensor (CPS). No spray or a dribble would mean a fuel issue fuse, pump relay, wiring to pump, pump, pump ground. A spray means fuel and pressure is available to the injectors. ![]() Look for the fuel rail's test valve covered by a large black plastic cap, remove it to reveal the schrader valve resembling a tire valve, cover loosely with a rag while depressing the valve stem expecting a healthy spray of fuel. The following steps will be easy to perform.įor testing fuel and pressure turn the ignition key to the ON/RUN position and listen for the faint hum/hiss sound of the fuel pump running for 2-3 seconds then shutting off automatically (for safety). Putting aside the SES error for the time being, try separating a fuel issue from an ignition issue. ![]()
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