This sounds familiar to what I experienced last year when I got my engine put back together:

3.0 rebuild - look near the end.

For me it came down to it being the ECU and a faulty "new" fuel pump. I was able to pull codes from the ECU and it didn't have the typical leakage but after getting the ECU fixed (for about $150 and lifetime warranty) all was good.


'91 RS, '93 SR