Just swapped out a stock 305 for a 350 in my 93 caprice. Can feel the difference in power, but now I'm noticing a hiccup when I accelerate. Wondering if it could be a fuel injection problem...any advice?

 

Hey! Sorry for the bad English, I use a translator. Perhaps failures when you press on the gas pedal of a badly exhibited ignition (coil and candles) on a new engine 350m. Perhaps distributor in bad condition.

I would draw your attention to the fuel pump, if it is stock, then you need to put a more powerful fuel pump, just try to change the engine control module, it may be necessary to change to one that set 350 engine

 

So, basically, it would be best to change out the ecm, fuel pump, and distributor?

 

I'd start by checking the distributor ignition and exhibiting the ignition stroboscope

 

it might be an injector problem ! did you try running some injector cleaner in the tank ? it also might be the fuel regulator too , or no vacuum going to it ! if it has a carburetor then it could be the accelerator pump inside the carburetor ! did you check the fuel filter, it might be partly clogged !

 

My bet is you need the " computer " from the donor car .

God bless
Wyr