I also think you need to run your rack. First set your injector height, just like setting the valves on ether side of it. turn engine until one cylinder inj is down,just like the valves you are looking to set them all the way up. A Detroit tool is good but a caliper is ok. the height is 1.470,this is setting the timing, take your time set them all the same! again just like setting the valves, only you are measuring the height instead of the gap of the spring. Setting the rack is the hardest for me. Move throttle to wide open. Look for the shaft that has two screws on top to adjust. remember this rack must always move by-itself to idle. With the throttle wide open the back actuator can't hit the head bolt. I set this one first about 1/8 in from the head bolt. then adjust the next one exactly wide open, with the two screws on the shaft. then the front inj. Move the throttle back to idle. everything should be free. push it with your hand do they all start at once, do they all push their inj exactly wide open. This might take you a hour. don't be in a hurry. The best thing would to get a book! After you do this the idle speed will be different. Be sure the rack goes back to idle by itself! Have fun, you did check your valves. Vic
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