easiest way is to take them all the way out and throw them in the ash tray, but if you dont wan that much, you can feel if they are even or not, get them close by feel(one will feel looser than the other) and turn in at 1 turn intervals equally and go from there. Taking them all the way out is the easiest then turn them in 4 turns and try it, adjust accordinly from there.

3406b
 

the 3406b was brought out in Australia with PEEK specs. running half electronic fuel injectors. i have been unable to find a mech head with enough expertise to ramp up the 350 measly hp it puts out. is it electronic or mechanical adjustment. the 3406b run anything up to 475 hp in any truck here. what is the main ndifference to the output? please, anyone.

Did you try the tips in the "Company truck runnin' kinda sluggish" sticky? A guy I used to work with works at a Cat dealership now, I'll have to see if he knows anything about the PEEK system. Let us know if you have any success turning that thing up.:c:

3406b pump
 

i'm still not sure the description on the link will be the same, as it looks different to the full mech unit. thanks anyway. it still may come in handy.