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Chevrolet Repair/cavalier/fuel pump fuse keeps blowing

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QUESTION: 1997 cavalier 2.2l  fuel pump recently replaced, but the fuse will  blow. Sometimes days sometimes hours. Hot cold doesn't seem to make difference. Have had entire harness exposed, tried wiggle tests, can't seem to find short. This circuit also powers the injectors. On this system each injector has its own relay. Doesn't matter if its freeway or in town driving. It blows at different times with no common factor to help pinpoint. I'm stuck any clues or insight would help. I thank you in advance

ANSWER: GOOD DAY MARK, YOU SAY EACH INJECTOR HAS ITS OWN RELAY..4 RELAYS, I DONT THINK SO..ARE YOU SEEING 4 RELAYS, ONE FOR EACH INJECTOR ??? THIS MAKES NO SENSE...ONE RELAY FOR FUEL PUMP,ONE RELAY FOR IGN ONE RELAY FOR PCM...ANYWAY WE CAN RULE THIS OUT OF THE PICTURE. LETS LOOK AT THE FUEL PUMP AGAIN..I WILL ASSUME THIS PROBLEM WAS NOT THERE BEFORE YOU REPLACED THE FUEL PUMP ???? IF I AM CORRECT IN MY THINKING I HAVE TO ASSUME THE NEW FUEL PUMP IS DRAWING TO MUCH AMPS,POPPING THIS FUSE..IS THIS A AFTERMARKET FUEL PUMP ??? IF SO I WOULD BE VERY CAUTIOUS ABOUT IT..WE HAVE HAD MANY, MANY, MANY, PROBLEMS WITH THESE AFTERMAKET PUMPS. WE GOT TO THE POINT THAT WE ONLY INSTALL DELCO PUMPS..YOU COULD DO ONE OF 2 THINGS TO FIND THIS OUT. PUT A AMP METER BETWEEN THE REALY AND MAIN FUEL PUMP WIRE AND DEAD HEAD THE PUMP AND WATCH WHAT KIND OF AMPS IT PULLS. TO DEAD HEAD THE PUMP REMOVE THE VACUUM TO THE REGULATOR. AMPS SHOULD BE LESS THEN THAT CIRCUIT IS RATED FOR....SECOND OPTION IS TO GO UP 5 MORE AMPS ON THE FUSE AND SEE IF THIS CORRECTS THE PROBLEM...THIS IS JUST FOR A TEST AND THE SECOND IS NOT A FOOL PROOF WAY TO TEST..ONE MORE THING I JUST THOUGHT OF, IF THIS HAPPENED AFTER THE PUMP INSTALLATION I MAY WANT TO DROP THE TANK AGAIN AND LOOK AT HOW THE WIRING IS HOOKED UP TO THE PUMP,, MAKE SURE ALL CONNECTIONS ARE TIGHT ANY PLAY IN THE MALE AND FEMALE CONNECTIONS MAY CAUSE THIS PROBLAM AS WELL. CAUSING HIGHER CURRENT DRAW..LET ME KNOW HOW THIS WORKS OUT FOR YOU AND GET BACK TO ME..GOOD LUCK TO YOU,,,TOM...

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injector diagram
injector diagram  
QUESTION: Believe it or not but each injector has its own relay. I will try to insert wiring diagram in this reply. It may be a cluster pack I don't know. I tried to locate relays last time I looked at car, but couldn't find it. (under intake manifold I believe) This problem was there with last pump, I didn't install pump, I saw the car after pump installed and no one could figure out problem. Good idea with dead heading pump though. Have had tank down enough to pull connector and check harness. Thank you for such a quick response. Will try dead head this afternoon. Strange one, want to make sure pump is problem before I make her spend money over again.

Answer
HI MARK,I CAN NOT BRING UP YOU WIRING DIAGRAM TO SMALL TO LOOK AT BUT I BELIEVE YOU I HAVE NEVER HEARD OF 4 RELAYS FOR EACH INJECTOR. WHEN I GET TO WORK MONDAY I WILL FOR SURE LOOK THIS UP. BUT LETS SAY IT DOES HAVE THIS I DONT FEEL THIS WOULD POP A FUSE..IF YOU REMOVE ONE RELAY HARNESS AT A TIME DOES ONE INJECTOR STOP PULSING ???? YOU HAVE A NOID LITE ?? IF NOT USE A 194 LIGHT BULB AND BEND THE TANGS TO FIT INTO THE INJ HARNESS WHILE RUNNING TO CK FOR A PULSE..
IS THIS A AFTERMARKET PUMP DO YOU KNOW ??? KEEP ME UPDATED ON THIS ,,TOM..

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TOM SHEETS

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PLEASE READ ALL OF THIS BEFORE ASKING ANY QUESTIONS. IF THIS CHEVY SECTION IS MAXED OUT.YOU CAN REACH ME IN THE OLDS/BUICK SECTION. Will answer questions from 6:00am to 10:00pm all days [EST][[[ NO DIESEL OR PAINT QUESTIONS]]] will answer all 1965 to present QUESTIONS ON ALL GM'S on mechanics of these cars. Keep in mind i am not there in person i am going on what you are telling me !! PLEASE IF ASKING A QUESTION GIVE ME AS MUCH INFO AS POSSIBLE. THE MORE THE BETTER. SUCH AS YEAR,MAKE,MODEL,ENGINE SIZE. THIS WILL HELP ME HELP YOU. I will not be able to answer all questions because of some situations that i would really need to be there and see things for myself,such as electrical issues. In many cases i would need wiring diagrams. I can also give you an estimate on what the cost would be at our repair shop as an idea to help you. Keep in mind that my answer is ONLY MY ADVICE,ck with your mechanic as well.. >> THANK YOU, TOM..

Experience

I have been a ASE certified master mechanic for over 30 years and certified IN ALL 8 CATEGORIES,[engine repair,engine performance,auto trans,manual trans,clutches,steering and suspension,brakes,electrical systems,heating and air/cond. I am also a state CERTIFIED inspector for over 30 years. I do computer work [pcm]fault codes,pcm flashing,state inspection monitor readiness,repairs on exhaust,fuel service,[injection and carburetor,] charging system problems, running issues,alignments,frame problems,tire balance,struts and of course standard and anti-lock brakes.

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nys state auto repair industry and ase group.

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high school,4 years of tech school,and many many hours of auto training with many gm classes and aftermarket training classes..

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ASE MASTER TECH CERTIFIED IN ALL 8 CATEGORIES.NYS INSP LICENSE AND A/C CERTIFIED

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