Bogs down when accelerating

On the converter issue I failed to mention I gutted it. The increased horsepower is noticeable but it didn't change the problem. The rpm's will jump from around 2,600 to 3,500 no in between. That is when the bog down occurs. It feels like it is starving for fuel at that point. The transmission doesn't slip but it seems the bog down occurs at shift intervals. Ie 1 to 2, 2 to 3 etc, but it is not only at those points. It is time the accelerator is depressed too much. At that point it may rev high but it sticks right here at whatever the rpm. Is and will not accelerate. It feels like its running out of gas. Lift your foot and depress the accelerator again and it will begin a slow acceleration but it does accelerate unless you give it more gas at which point the process repeats. I was going to double check the timing marks this weekend though I am certain I got them spot on. This is an interference engine timed to the number 2 cylinder at tdc and it works on a four cycle rotation to get the marks. Aligned. I would think even if I were a notch off by now the motor would be trashed and the belt I replaced though about to snap was. Only 25% cut across its weak spot. It didn't jump. Timing my friend drove it. With the thing flapping until I finally told him it had to be done and did it for him. He. Lets me use his other car and owns the house I live in so I am trying to help him out with this and I am failing miserably. I tested his coils found one bad. Verified by the number 2 plug not firing and him being electrocuted was all he needed to know to convince him to change the wires, lol. His old plugs were gaped to.095, fuel filter reversed and so was the check valve for the emissions. I checked the EGR and that's good too, by the way. I will do as you suggest and check the pressure regulator tomorrow. Thanks for the response I will let you know how it goes.

Here is some new information that just appeared out of the blue:.A misfire began last night very noticeable. He vehicle by the say at idle ran fine. No bogging down whatsoever and accelerator pedal and fuel supply and spark were all in sync.

I used a spark tester and I can see the misfires I got three of them. Cylinders 1-3 and 5. Oddly this is the entire right hand bank of the V 6 and more oddly it represents only one tower on each coil and it is an intermittent miss coming from just those 3 cylinders. 2-4 and 6 are working perfectly.

I don't know how the above scenario is even possible! New plugs new wires. I have to solve these misfires in order to go on. Maybe I am just stuck on the coil packs and module being no good and the fact that I have to keep replacing them with used coils and modules isn't helping. I guess I am looking to confirm my theory or offer an alternative because none of this makes any sense to me they should either work or not work. Am I wrong?

Mote information. I changed the 2-5 coil thinking I could confirm the odd number cylinder misfire was not coil related. It fixed the misfire in all 3 cylinders. I am thinking I have a wiring problem and the signal to fire those from the computer to the module is being broken or shorted along the way either from vibration or heat expansion. I checked the vacuum line to the pressure regulator no fuel present. However, idle improved immediately when I disconnected the line and it started back up without issue. I need to go out for ice so I am just going to stick a plug in the vacuum line and see if it helps or hurts. F it helps I will pick up a regulator while I am out and change it anyway.