1985 mercury marquis(ltd2)
 

Hey everyone, i know this is the grand marquis forum but you do not have a regular marquis forum so will ask here. I have a 1985 marquis 3.8L CFI(same as LTD2) that runs like crap at low idle and if you try to give it gas it stalls out and dies, if you adjust the timing all the way up it runs like that and doesnt stall out when you hit the gas. I have replaced the oxygen sensors, TPS, fuel pressue regulator, and changed out the whole CFI, i also replaced the PCM with one i had out of 1984 3.8l v6 Thunderbird with the same numbers that ran fine when i pulled it from the Tbird. I still cant figure out whats wrong with it and i am out of ideas, so any help anyone can provide would be useful.