Chevrolet Repair: 2000 Chevy Tahoe 4wd 5.7l fuel pump/regulator?, fuel pressure gauge, chevy tahoe

Question
Our tahoe cranks, but will not start, we changed the fuel filter and it ran for about 2 weeks and then did it again.  We put another new fuel filter in and it continues to not start.  When you put the key into ignition (the chilton book) says to listen for a whirling sound and that if you hear that then the pump is working, we do hear that noise....so the question is what could the problem be?

thanks so much for your time!!
Stacey

Answer
HI STACEY, WE HAVE REPLACED MANY,MANY FUEL PUMPS ON THESE TRUCKS. JUST BECUASE YOU HEAR THE PUMP WHINE THAT DOES NOT MEAN THERE IS PRESSURE AND VOLUME TO THE FUEL RAIL TO THE INJECTORS. THIS MEANS THAT ALL CONNECTIONS TO THE PUMP ARE ALL GOOD...I WILL ASSUME YOU DO NOT HAVE A FUEL PRESSURE GAUGE,DID NOT THINK SO..LOL..SO, A VERY EASY WAY TO SEE IF YOU HAVE A FUEL PROBLEM OR IGNTION PROBLEM IS TO GO TO THE PART STORE AND GET YOURSELF A CAN OF STARTING FLUID. OPEN THE HOOD AND REMOVE THE AIR DUCT TO THE INTAKE SYSTEM FROM THE AIR FILER BOX, SPARY A [LITTLE] STARTING FLUID INTO THE DUCT WHILE SOMEONE CRANKS THE ENGINE OVER. IF IT STARTS YOU HAVE A FUEL PROBLEM,STILL NO START, YOU HAVE EITHER A IGNITION SYSTEM PROBLEM [NO SPARK] OR ENGINE PROBLEM. I BET FUEL PROBLEMS. IF THIS STARTS UP ON STARTING FLUID, DO NOT KEEP DOING THIS,THIS IS JUST A TEST... . ALSO A FUEL FILTER WILL NOT CAUSE A NO START,A DIRTY FUEL FILTER WILL CAUSE LOW POWER ON THE OPEN ROAD OR HESITATING PROBLEMS..I HAVE NEVER SEEN A PLUGGED FUEL FILTER WHERE THE ENGINE WOULD NOT START. WHAT HAPPENED TO YOU WAS JUST A COINCIDENCE,HONEST!!! ANOTHER WAY TO CK FOR FUEL IS TO REMOVE THE TOP ENGINE COVER AND FIND THE SHRADER VALVE ON THE FUEL RAIL. REMOVE THE CAP AND PRESS DOWN ON THIS VALVE [LOOKS LIKE A TIRE VALVE STEM] HAVE SOMEONE CRANK THE ENGINE OVER WHILE YOU PRESS THIS VALVE DOWN THERE SHOULD BE GAS COMING OUT OF THIS VALVE [ALL THE WHILE YOU ARE CRANKING THE ENGINE OVER]. NOT JUST A LITTLE FUEL.>>>>[THIS IS CALLED RESIDUAL PRESSURE, IT WILL FOOL YOU]THINKING THAT THERE IS PRESSURE THERE,BUT IT WILL DIE OFF..[AGAIN PRESSURE AND VOLUME IS WHAT WE WANT..] I HOPE THIS HELPS YOU.IF YOU NEED MORE INFO GET BACK TO ME..OH,IF IT NEEDS A FUEL PUMP ONLY PUT A GM PUMP IN. THEY ARE NOT CHEAP AND THE TANK NEEDS TO COME OUT.. JOY!!!