I changed the fuel pump on a 1997 Monte Carlo 3.4 motor and now I have no fuel pressure. The pump motors turns on but it doesn't pump any gas. Do I have to bleed the fuel system? and how do I do that? thanks

it is easier to test fuel pressure no pressure no pump easy test for pump have some one turn on key as you listen to fuel tank with gas cap off ear to filler hole. pump should run 2-3 seconds and shut off

have a coolant pressure test done. Have the radiator cores checked for blockage. Sometimes when an engine has sat for a period of time, rust and scale form in the water jackets of the engine. ON running ,this breaks away and blocks the cores of the radiator Other times the old motor tolerates a partially blocked radiator when a relative new motor needs all the cores free to maintain the temperature.

Hello: WHEN IT DOESN'T START THAT IS THE TIME YOU NEED TO DIAGNOISE THE PROBLEM. A INTERNAL COMBUSTION ENGINE NEEDS THREE THINGS TO RUN- AIR, FUEL AND SPARK. CHECK FUEL PRESSURE. CHECK FOR SPARK TO THE SPARKPLUGS. IT COULD BE THE ENGINE COMPUTER , THE IGNITION MODULE. IT COULD BE THE CRANK SENSOR. WITHOUT HANDS ON DIAGNOSIS I WOULD BE GUESSING.

The ECM BAT fuse powers the fuel pump through the relay. If the gray wire has power and the black wire has ground, and the fuel pump does not operate, its bad.

disconnect the hose that goes into the fuel injectors rail, put it into an empty coke bottle and ask for a friend to put the ignition switch in the on position. if there isn't gas going into the bottle, then you should check for the fuel pump relay and if it's ok then check the fuel pump. Check the fuel pump fuse too.

Check fuel filter, fuel pump pressure, try putting a little gas in the intake manifold, if it starts adn stays running, the fuel pump is not putting out enough presure to open the injectors to start.

Could be the fuel pump relay is worn.

big red
its your fuel pump the filter is probably dirty remove your gas tank and change

check fuel pump quick check spray starter fluid if starts no fuel reaching throttle body if no start or gas is present at throttle body check for spark from distributor to coil pack

A RESTRICTED FUEL FILTER WILL PROHIBIT PROPER FUEL DELIVERY....CHECK THE FUEL FILTER OR POSSIBLE A WEAK FUEL PUMP...THE ENGINE MAY BE STARVING FOR FUEL AT HIGHER FUEL DEMANDS