More updates :
Had the injectors I bought yesterday checked, they didn't work. Checked my own injectors, they worked after changing the filter on one of them.
Fuel pressure checked again - at ignition 40psi, at idling 33-34psi.
Checked vacum - stable at -21 inhg (around 11 psi)
Checked engine compression - 175,175,170,175
The spark plugs were in pretty decent nick, light brown.
One more thing I noticed today since the weather was good : The jerks as well as the bogging is eminent very profoundly when the AC is on. With the AC of, I almost didn't feel any of the symptoms at all. Infact what I may have felt might have been just a placebo.
Don't know if that tells anything..