Easier to read:
The pressure is only 14 psi on the TBI. You should look at the rebuild kit with replacement injector for the throttlebody. This is in the Schaef thread below:
How to google the forum:
To download the fsm:
If you download the FSM and you are not a member of dropbox, please PM Ninjakid and join under him. It gives him more space to store and it is a real generous thing to get the manual for free!
Also lots of good info in Shaef's threads about his TBI:
Get a multimeter. Some of the pre 91 tbi sensors require an adjustment to setup when replaced. Since you are dealing with PO that probably didn't know, chances are you need to do some adjustments with the basic tune up. Wide open throttle switch(WOT), the throttle position sensor(TPS), Idle Speed Adjustment Motor(ISA), and the fuel pressure on the throttle body.