1987 Toyota Pickup carb or engine problems

As I stated I had some carb issues and I checked all the main jet ports, power piston, power valve and checked all the vacuum lines and cooresponded with the book and the dealers spec. All lines are connected. I removed the egr valve and cleaned it and checked the diaphram it held vacuum for over 12 hours. I still get excessive fuel in the primary venturi. I checked the compression in all the cyl. And I found that all are about 155 to 170psi but the 4th cyl. Only has 105 to 110. Even if I added oil to the cyl it only gained about 15 psi. I checked valve clearance it was only off 1 to 2 thous loose but didnt tap. Is the carb problem with the compression problem or is there more to it. I started messing with it because I had trouble starting it but not traveling long distance I would go 300 miles one way once a month. Just was tired of the hard starts. Dont mind donating but need really fine answers. Depending on the accel set point I can hold my hand over the carb and run better but I don't seem to have a vac leak