What's the possibility of a old 3 port boost solenoid sticking on high boost? it clicks as it should with the test mode connectors connected & has been cleaned with carb cleaner a number of times, symptom I'm seeing is a pause on high boost but pulls through it, i've replaced all coil packs with new, spark plugs gapped correctly,maf,all boost hoses with correct Id replacements & the restrictor pill is still in place, I'm seeing 15psi on the electronic gauge but this over reads slighty so is within the fuel cut limit, any help ideas appreciated