I am not getting power to my fuel pump. the truck was running fine until i replaced my spark plugs and wires, then the next morning my truck wouldn't start. I've replaced the fuel pump, filter, relay, fuel pressure regulator and it still isn't running. any suggestions?

Sounds like a fuel issue. I would make sure you have at least 45lbs of fuel pressure at the fuel rail. If not, make sure the fuel pump runs. Chances are you will need to drop the fuel tank and change out the fuel pump.

first need to make sure you have enough fuel pressure. Hook up a tester and check against the specs. if its too low, then your probably looking at a fuel pump. By replacing the filter, you allowed more fuel to flow. Also, make sure you are getting spark and injector pulse.

Ok what you are going to have to do is called a wiggle test have someone cranking while you wiggle all the wires at the module and everywhere till it starts or tries to start and when you notice a condition for the better examine that area very well for (ANY) type of wire problems. Please rate my solution and give testimonial this is how i earn my achievements Thanks in advance

have diagnostic codes checked to see if you have a cam or crank sensor fault. make sure fuel pressure is at the required pressure, just testing to see if you have fuel at the valve is not enough. replace all spark plug wires. if you replaced two then all are just as old and even when they "look good" does not qualify as "they are good". Replace coil pack. start up drive away happy

did you reset the alarm/immobiliser system every time the power was disconnected???

u prob need a new radiator or new spark plugs and probly a new car

And do you have spark at the plug wires when it won't start? You need to check to see if you have spark at the plug wires. You can buy a simple tester for under $10.00 at the parts store and it will show you if you are getting spark.

I HAD THE SAME PROBLEM WITH MY 1999 GMC YUKON WITH THE 5.7 ENGINE HAVING TO JUMP START ALL THE TIME TO GET IT RUNNING, THE PROBLEM WITH MINE WAS THE FUEL PUMP HAD TO BE REPLACED, EVEN WHEN I REMOVED THE PUMP AND TURNED THE KEY FUEL PUMPED OUT BUT WAS NOT ENOUGH PRESSURE TO GET AND KEEP THE ENGINE RUNNING.I ALSO TRIED STARTER FLUID, THE ENGINE WOULD RUN UNTIL THE FLUID BURNED OFF.SO THE SOLUTION FOR MY TRUCK WAS THE FUEL PUMP AND NOW ITS STARTING LIKE A CHAMP

Check the condition of the wiring coming off of the ECM. at the fender. I've seen the wiring insulation rub off causing no starts.