Stumble/ choke at first startup

[Burbintheburbs]

Ok guys. Hoping for help



I recently have bought a hunting truck, 147k. I've just put in new fuel pump,new transmission (hd built) , New plugs, new fuel filter, new cts, new air filter, cleaned throttle body(just from the top)
It stumbles Whe first started up, almost sounds like it would die out/misses)then if you open the throttle/ push the pedal down It opens up and smooths out. I've also noticed when driving while there is no miss it seems to lack acceleration/power overall. Once up to speed it does fine but its slow getting there and if you floor it from a stop its a dog out of the hole

Maybe rich/flooding?

Thanks in advance for input

Daniel

 

[98_k1500]

You didin specify a year, but if its a pre 96 i'd check the map sensor hose. Could be leaking vacuum somewhere and causing it to run rich.

 

[Burbintheburbs]

Thanks for the response

1994 k1500 suburban 5.7 L05

I will take a look. All other ideas to check are welcome and appreciated.