Got this truck last week. Another shop did the swap and tune. When we got it, it had 100lb. of fuel pressure! Wouldn't run but we fixed that. Now the problems we have are speedo way off, won't idle down past 950rpm, and can't adjust afr. It goes rich to lean back to super rich. In the middle of WOT ltft's are kick in and duty cycle is droping. ANY HELP WOULD BE GREAT! The last shop had it for a year while the owner was in Iraq. Now he's back and would like to have it.