1989 Gmc S15 jimmy help

[Sharksfan74]

So I have a 1989 s15 jimmy Sierra classic 4WD V6 4.3 liter with about 131,000 miles, I have recently put in a new radiator, water pump, had my spark plugs changed along with coil and cap and rotor, new transmission, and replaced the alternator. And the battery tested fine. When my A/C is on my car bogs down when accelerating, and even when my A/C isnt on it will bog down. Also I have recently replaced my battery wires and when I then on my A/C its draws a lot of bolts. Any suggestions on what it may be? 

[riverbanks]

Bogging without a/c on,low fuel pressure, worth a check

[Sharksfan74]

What would I do to do that? 

[riverbanks]

No test port on tbi, unfortunately, you could purchase a adapter and rent a fuel pressure guage,is the tailpipe clean or black from fuel,that gives you a idea if it's running lean or rich