BRONCO NOT RUNNING RIGHT

[JIM KLIM]

OK I BOUGHT AN 89 BRONCO WHENI BOUGHT IT, IT WOUDLNT REV PAST 4 GRAND AND HAD NO POWER AND IT STARTED TO SMOKE SO I PULLED THAT MOTOR OUT AND PUT A 94 H.O 302 WITH AND FORD RACING E 303 CAM AND TOOK THE AUTO OUT AND DROPPED A NP435 4 SPD IN THE TRUCK RUNS GREAT BUT WHEN U FIRST START THE TRUCK IT WILL WONT REV PAST 4 GRAND AND IT BACK FIRES I HAVE TO TURN ON AND OFF THE TRUCK ABOUT 3-4 TIMES FOR IT TO REV UP NORMAL AND NOT BACK FIRE Y DOES THE TRUCK STILL DO THIS I CHANGED COMPUTER THINKIN IT MIGHT BE THAT AND ITS NOT EVEN THAT ANY OTHER IDEAS OR IF I CANT FIND OUT Y NOT IM RIPPIN THE FUEL INGECTION OUT AND PUTTIN A CARB ON IT THANKS