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Message: [QUOTE="6.0 Tech, post: 1555611, member: 23001"] Ok, we’ll got a different set of heads put on, they’re a used set off our race truck, but have had a fresh valve job done on both heads, valve springs are now 120#, known springs. Truck still runs like dog ****. Still leaving a pile of soot on the ground, and won’t rev over 1200. Had misfires on 1&5, verified pushrods were seated right, and swapped injectors with a couple new ones, still runs like dog ****. On a wild ass guess, I checked converter slip, computer was indicating it was locked. At idle actual slip was 15-55 rpm. I know it shouldn’t be an issue in park/neutral, but I’m throwing logic out the window at this point. Pulled the trans, still runs like ****. Anyone got any more ideas? I think on Monday I’m gonna try swapping the FICM again, as I swapped it before with ****ed exhaust valves, so kinda throws that diagnosis out, but other than that, I’m stumped… Sent from my iPhone using Tapatalk [/QUOTE]

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