Please Help!, pro's needed! Options

[j0ch0a94ST]

K guys so its been months now and my celica is still down on power. I've had other people who have had 6th gen st's drive it and they say the same. Like I stated earlier in the thread my friend advanced the timing almost all the way to get the thing operating normal or at least semi-normal. However there is still a noticeable power loss and I'm having trouble diagnosing it. I'm over at my friends house and we are going to vacuum test it tomorrow as well as retard the timing back to factory to try and trace the problem. If you guys have any suggestions as to what else might cause the power loss it would be greatly appreciated.

The following have been ruled out:
spark plugs(replaced)
spark plug wires(replaced)
fuel filter(replaced)
injectors(do not contain water)
No check engine light or other idiot lights so NO code to diagnose
Distributor has no water and appears to be working fine

Thanks again guys

[ricochet1490]

^x2 = if water got in an around that MAP and somehow threw it off but not enough to throw a code, the ecu could be dumping in the fuel. For instance if it's reporting a -20F temp or miscalculating the flow of air or something that would make the ecu dump the fuel to it..... work an inspection anyway. May not even be "water" but maybe something like water deposits, calcium etc.