2.3 turbo rail buggy 1988 Engine feels like it’s under power

[slowandthecurious]

The engine runs good but feels like a regular 4cyl with no turbo. It will rev to 4000 rpm’s and that’s it.
Codes is only code is 54
15psi boost
255 fuel pump
Kirk regulator from your site set at 39 with vac off
La3 computer from bigrracing with his stand alone harness
New reman vam
New tps
New pip
Coil
Motor craft plugs at .030
New wires 8mm
Timing set 10 with spout out
The only thing I can think it could be is the cam or the computer idk

[Stinger]

Sounds like cam timing is off a tooth or two.

[slowandthecurious]

I’m check it again here’s a quick video

[Stinger]

Could also be weak valve springs, though I don't typically find that limits RPM, it just is down on power and it runs rough after revving high (because it's running on 2 or 3 cylinders). Then once the HLA's bleed off the excess oil, the valves close and it runs normal.

Building boost in neutral is typical of a cam timing issue.