you don't say what problem you're trying to solve. cold control pressure usually is around 1.0 to 1.4 bar. a bar being 14.7 lbs. or one atmosphere. if it's too high during cold running the engine spits and pops, and is hard to drive for a few minutes. if it's too low, it runs too rich, idle surges up and down, and it smells rich, the warm control press. is 3.4 to 3.8 bar. the system press. is 4.8 to 5.2 bar. adding or subtracting shims in the fuel distributor check valve raises or lowers system press, which affects control press. accordingly.
[This message has been edited by john walker's workshop (edited 03-27-2001).]
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