running problem under hard acceleration

it might be ur fuel filter, only problem is, its expensive cause most filters are inside the fuel tank.

ALL BULLSHIT U GUYS. FIRST OF ALL, U NEVER PUT A HIGH PRESSURE FUEL PUMP IN A STOCK VEHICLE......PERIOD. BIG MISTAKE !!! YOUR INJECTORS CAN'T HANDLE IT. WHAT WERE U THINKING ? CAN'T PUT 100 LBS. IN A 10LB. BAG, GET IT ??? GOOD, NOW LETS MOVE ON, REVERSE WHAT U DID. OR BUY UPGRADE GREEN FUEL INJECTORS, WITH NEW O-RINGS, NEW FUEL AND AIR FILTERS, NEW OXYGEN SENSOR. E3 SPARK PLUGS. MAKE SURE PLUG WIRES ARE GOOD, OR BUY NEW GREY REPLACEMENTS. YOUR MAS, MASS AIR FLOW SENSOR MIGHT NEED REFURBISHED, WWW.CARDONE.COM , THIS SENSOR IS CRITICAL TO GREAT PERFORMANCE. KEEP YOUR MOTOR OIL CLEAN W/NEW FILTER. DO U UNDERSTAND ??? I'VE OWN A 1987 GN ALL MY LIFE, I KNOW WHAT IT TAKES, I TREAT IT LIKE MY WIFE, WITH KID GLOVES, LIKE A DOCTOR AND HIS PATIENT, U NEED TO KNOW ALL YOUR SENSORS R GOOD, THE GAS WE BUY TODAY IS GARBAGE, ETHANOL IS KILLING OUR ENGINES, GARBAGE IN GARBAGE OUT. KAPESH ??? BY THE WAY, I'M GERMAN . BUT LOVE ITALIAN FOOD. GOOD LUCK MY FRIEND. KEN

PS, YOUR CRANK SENSOR MAY NEED REPLACED, ALSO, HARD STARTING AND BACKFIRE THRU THROTTLEBODY R SYMTOMS.

CHECK OUT MY RATING ON FIXYA.COM, WHAT THEY GIVE ME HERE, IS CONDISENDING !!!

ALL CAPS ('shouting') and lecturing is pretty harsh, dude. We get it - you know cars/GN's. Just chill and give your advice to someone who may not know as much as you. Somebody COULD JUMP ALL OVER YOU for your spelling (ie. 'Kapesh' is actually 'capice' from Italian. And 'Condisending' is condescending.