Having similiar issues to Rubenk. 1989 turbo swap running rich
So I'm still trying to dial in and fix some issues on my 1989 mustang with a turbo swap. Vacuum gauge and narrow band air/fuel meter installed. Vacuum reads 16in/mg at idle and mid 20s on decel. It goes to 0 and only builds a little boost on acceleration 3-4psi.(guessing this is a boost controller issue) The air fuel meter still reads max rich all the time (startup, reving, accel, and with the car warmed up). I've replaced the O2 sensor, ect and fan switch in the manifold as well as the temp gauge sender and the TRW box. Good news is the fan and gauge work as intended, bad news is I don't know where else to look or what to check.
Stock 2.3 block
forged pistons 8-1
38mm external wastegate
new rings and bearings throughout
160lph pump (new filter)
36lb injectors (brown tops)
LA2 cpu with switchable mapping (toggle switch wired into console)
Let me know if you need any other info
Where should I look now?
PS I used stingers wiring guide for the LA2 swap and eliminated the egr as I used the wires for the VAM(big)