ORIGONALLY THE CAR HAD BEEN WATERLOGGED. .. I =M IN THE PROCESS OF RESTORING IT AND DURING THE PROCESS I ACCIDENTALLY BROKE THE FUEL PUMP...WHICH HAS NOW BEEN REPAIRED BUT THE CAR IS HARD TO START AS IF THE THROTTLE BODY IS NOT GETTING ANY FUEL. I HAVE TO USE STARTING FLUID EVERY TIME I START THE CAR
Check the fuel pressure and the vacuum system.
You may need someone to help with this, or not.Turn off the radio and any accessory that will interfere with hearing the fuel pump. Turn the key to the on position,the fuel pump should turn on for a couple of seconds to build fuel pressure, and then the pump will shut off. Turn key off. Turn the key on, the pump will do the turn on and off again. Do this about 5 times. Do not turn to the start position until after the 5 times of building the fuel pressure up in the lines. After the 5th time, turn the key to start the vehicle. If the vehicle starts, then you're loosing fuel pressure when it's not running. Most cars have about 60 psi of fuel pressure. You'll need a fuel pressure meter to check it.
SOURCE: 2002 chevy Blazer hard starting
i agree with the fuel pump problem this is quite common with these trucks. but the fuel injectors on this motor are not accesable without removing the plenun and they are not standard fuel rail injectors so you can not test as earlier instructed.
SOURCE: 2002 Chevy Silverado 4.3 will not start. Was
I would try swapping the fuel pump relay with another in the fuse box under the hood with one that has the same numbers to see if the relay is any good.Then I would check all other fuses and replace any bad ones.The fuel pump is not just controled by the fuel pump fuse alone there are other components that control it and if those fuses are bad it wont run.I would also check to see if a wire got pinched from the instalation of the fuel pump that finaly rubbed through to brake the connection or shorted it out.
SOURCE: 96 Cavalier. "sometimes" wont start
The fact that you get enhanced ignition by physically enriching the fuel air mix indicates that the normal mix is too lean, either too little fuel or too much air. 1) Check for leaks of un-metered air in to the air ducting and inlet manifold. Look for cracks and poor joints to all vacuum lines including the evaporative emission recovery lines. 2) Check that the EGR valve is closed off at start up: this should stay closed until engine has warmed up. 3) Finally check that the coolant temperature sensor is working OK; the sensor should be informing the ECU that the engine is cold and the ECU responds by ensuring an enriched fuel mix (by prolonging the injection cycle) during engine warm up.
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