Miss that is developing? (Help)

[TFENT]

Miss that is developing?

Ok so I had the Z in the garage for the last several months and I went to drive it last week and right out of the box the car would not start, cranked over but no start. Car is a 1990 w/ 32K all stock as far as I can tell. I let it sit for 20 minutes and went to start it and it cranked right up. But started to misfire.

I then drove it up to the gas station and dumped a van of Seafoam in it and 13 gallons of gas. It was running pretty rough then would smooth right out. Tried to drive it a bit then after 20 miles it stalled out at a light and cranked over but refused to start. Embarrassed I kept at it till it started and spit and sputtered. Died again. Then waited 30 more seconds and it started right up but with a heavy miss. Drove it 20 miles via freeway and no issues. In city driving at lights it is kicking and screaming, under part throttle even worst. Under heavy throttle runs pretty well. Popped a code 44 and 55. Now it is refusing to run hard under WOT so the problem whatever it is, is getting worst. Code 44 is Left O2 Sensor Lean, Code 55 is System Voltage.

I spoke to Jerry (Jerry?s Gaskets) and order O-Rings and gaskets in case I have to yank the Intake.

Its weird, the stalling makes me believe it could be a fuel pump because right after I start it, it runs pretty good. But the driving around and at an idle makes me think Fuel Injectors.

What are your thoughts??

Thanks in advance.