help

[astrohell]

have 94 astro 4.3 v-6 haveing trouble with it backfiring , very sluggish have replace many part already clearn throbble body replace fuel injectors ,coil clearn erg valve any thing else

[sreve]

have you checked the timing? 0tdc( be sure to unhook e.s.t.)
fuel pressure would be the next thing i would check if timing is ok