car seems to bog down

i just had a feul injection cleaning done, and all my vacuum hoses corrected and everything.... well i went to leave to go to work yesterday and i got in the car, and when it first starts off it seems to bog down or something. i can press the gas to the floor and it barely moves, then about 3,00 rpms it will do fine....it only does it the first few times i press the gas, then after that it runs good.

89 si w/ dohc zc--pr5 ecu

have u changed ur spark wires lately??

not since i got the engine in (bout maybe 2 weeks ago)

check your timing, could be off a little