It might be a bit rough until you log a few hours IF the nozzles were replaced. I had the local Bosch boys rebuild a set w/o replacing the nozzles and it ran better then before. They did tweak the shims or spring preload. Dont know about you, but I got all anal about rinsing out the hard lines before I put the injectors back on. I had simply left them sitting,a dn you wouldnt think anything could happen but..... I had a bugger of a problem once with a Holley carb I literally set aside while I swapped a motor ( an hour back as a kid). well, somhow a piece of crud endied up getting in there and blocking an air bleed. A Holley carb is a crude piece of equipment as comapred to an injector OR an IP.