troubles with 3306 cat

Hello everyone first post here my name is larry good to be here so thanks for having me . then right into the question i have this huge problem for myself i guess. What i have is a 1994 ford l9000 with a 3306 cat engine i done a complete in frame on it last week now im having troubles getting it to start i can spray either in it and it will start and run as long as there is either going to it. the truck has set for a year but it was running fine until it started blowing oil and knocking so new pistons rings sleeves onlything we didnt change was cam bearing and nothing that would have caused us to remove the front of the engine. The injector pump was never removed i did install new injectors today but havent been able to see if it would start yet but i was hoping you all could give me somethings i might should check to make sure i havent done somthing incorrect when i had it running with the old injectores / either i could see air coming out around the injector holes also im guessing i didnt have them tight enough. The story with the old injectors was i had them looked at by a injector shop and he said they were no good pressure was down wasnt able to rebuiold the pencil injectors so i purchased new also silinoid is coming on and im getting fuel to all injectors but one not even getting it from the barrell i beleive its cyl,#3 but i would have thought it would still run on it own Please help with any info you might have thanks

troubles with 3306 cat