i have a 1990 iroc-z28 with a 350tpi. a while back i had a problem with losing power when i was driving. the engine would cut out and bogg down when i stepped on the throttle, the car would idle just fine but once i got on the throttle it would cut out. i took the car to a shop and they told me it ws the ignition i thought it was the fuel system. the shop replaced my ignition system new plugs, wires, and the distributer. still didnt work. i had the shop change the injectors and the problem was solved. the shop that put the injectors in replaced the stock injectors wich are 19lb injectors with 30lb injectors. he told me that the computer will need to reset itself after a few hours. i drove it and nothing was wrong, until one day my battery died and it must have reset the computer now my speedometer doest work properly it bounces up and down from 0-30 constantly i have no clue how fast im goin. also my rpms are wayyy to high i usually idle at 600 now i am idleing at 2000, and the needle goes almost all the way around back to 0 when i drive. could this problem be from the bigger injectors putting to much fuel in the clyinders and the computer is trying to fix it or do i need a new speed sensor and idle control motor...

 

Correct me if I'm wrong... but doesn't the 350 tpi have 21 lb injectors and the 305 have 19 lb injectors?