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Did you go back and look over your work real good? look for any wires that may be unplugged of if any plugs went in hard, you may have bent the blades over. You need to determine iof you have spark and fuel pressure. You can find out if your getting injecter pulse from the computer with a noid light (shown below). Check your firing order if you removed the cap or any wires. Once you know what function your lacking, you can narrow down the problem.
You still haven't told us the basic answers
Just what was the fuel pressure anyway?
Since you already know that, have you taken a compression test to determine if you damaged anything?
Maybe bad fuel. Have you taken a fuel sample?
Diagram edited out.
The first diagram did not match firing order
1989 Dodge Caravan3.0 liter SOHC V-6 VIN "3"