If boost is normal, you can rule out a boost leak.
Is the car idling & revving normally?
Are there any inconsistencies with the tacho?
Check the resistance of each of the leads with multi meter.
Remove the dissy cap & check the cap & rotor button also.
Check the cat converter, it may be blocked.
Also do a compression test to be sure the engine is ok.
Failing that, go to your local dyno & run it up & check it.
This will tell you if there is a fuel or ignition problem.
It may be something dumb like a blocked fuel filter.
Hope that helps.

Cheers