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Have you checked your fuel pressure? Can you hear your fuel pump buzzing. Remove your gas cap and have a helper turn the key to the run position while you have your ear close to the open tank. If you don't hear anything you have a fuel related issue. Even if you hear the pump buzzing you need to check the fuel pressure as it may not be making enough pressure. If no buzz you may have a bad fuel pump, pump relay, or wiring problem to the pump. That is where I would start.
no. the noise you're not hearing is the fuel pump. When u turn ur key on you should hear a buzzing like sound from the rear of the vehicle. If not, and ur car don' start, probably fuel pump. Just to verify the faulty fuel pump, have an assistant open the fuel tank cover and remove the gas cap itself. With you inside turn just the key on, and have your assistant listen for the "buzzing" or "hummin" sound. if nothing there, then faulty fuel pump. If noise is present, then perhaps you have a different problem like nothing is reaching the engine, fuel wise. Like a plugged fuel filter. when replacing the fuel pump, ALWAYS do the new strainer as installing the old one could cause a whole new set of problems and eventually wipe out the new one as well *RULE OF THUMB, WITH NEW FUEL PUMP, REPLACE FUEL FITLER.* this will be easier on the pump output to the engine. good luck.!
Quick safe way to check fuel pump. Put key in and turn to ON position listen for the pump to buzz or hum. Don't hear it its either the relay, pump or circuitry.
There are other tests but too envolved and dangerous to do. Bring vehicle to repair shop if you don't hear pump buzz. If it Buzzes them problem is either with spark or air.
need spark tester to test for spark. Do visual inspection on air intake plentium (no wholes, leaks) make sure mass airflow sensor is a-ok.
ok when you turn the key on, you hear the buzzing sound in the tank? if you spray starting fluid into air intake, will the engine fire? there should be a fuel pressure port under hood on fuel rail i believe. if this is vortec style engine, injector assy under intake is possible. somewhat common. pull oil dipstick and smell for fuel. that would indicate maybe the pressure regulator has let go. ck for spark as well, just to be sure youre on the right track.
Had the same problem with my '96 Silverado with 350 Vortec. The truck would only crank. It would start if fuel was poured down the throttle body. Could not hear the fuel pump hum. Fuse was good, but could not hear relay click. Relay was good, Did some electrical wiring trouble shooting. Turned out that one of the connectors that clasp onto one of the pins of the fuel pump relay wasn't making a good connection, too loose. I just stuck a peice of wire into the connector and pushed the relay back in. Relay clicked, Truck Started. It's been more than 4 yrs. since I made that McGuyver fix. Still firing.