been havin issues for bout 2 months

any ides would be appriciated

have a 2004.5 with 96k ,mods are cold air, mouth piece, exhaust, head studs, juice edge, dc`d heat exchanger, haven`t put the finger stick on yet

the truck starts with silacone spray, will get to 3200 rpm no power

i through a 1093 code, changed the filter, shimed the prv, took it to chevy and they said cp3, i changed it, (wasn`t the prob), took to another shop they came up with 2 rear injectors, (pulled the glowplugs, spray), i replaced them, now the rail holds pressure ( can`t pump up the primer), starts on silicone spray and now power now.
i`ve replaced the filter head and the injector terminals
any ideas????
thx