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

[j0ch0a94ST]

So we tested the vacuum and it was at 21hg, I unplugged the MAP sensor and the car ran worse so the sensor is not necessarily bad but may be misreading. I'm going to a junkyard tomorrow to pick up another MAP sensor and possibly other parts. We are planning on taking off the EGR tomorrow and seeing if its clogged. Also going to check TPS sensor but I am running out of ideas. To recap it is still running RICH(you can smell it) when the distributor is at factory positioning. This has been a year long process so I'm in no hurry. The car still goes down the road, I'd just like for it to be running as good as it possibly can. Thanks for all the help