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removing the vac line to the WUR lowered the CP making it richer.
I would go thru and verify no air leaks, start with the intake bolts. they can loosen.
verify fuel pressures. you have 4.
system pressure
cold pressure
warm pressure with no vacuum
warm pressure with vacuum
fuel pump should run in the start mode. verify that it does
check valve at fuel pump.
I would also try removing the connector on the top rear of the AFM.
when hot and no start, turn the key to on and let the FP run for a few, then start.
sounds like it could be too lean.
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