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Have been having some startup idle problems and have searched around a bit but have not found a clear procedure for checking the vacuum operated purge valve on my 88T. There are three hoses to the charcoal cannister, the hard plastic line from the fuel tank, the big vacuum hose from the back of the intake manifold, and the smaller vacuum hose from the most forward port on the throttle body. I replaced the hoses but have discovered that if I put my new mitey vac hand pump on the last mentioned small hose it won't hold vacuum. Does this mean there is a diaphragm in the valve that controls the big hose that has failed? My 88 and 89 na's have the solenoid valve so I can't compare.
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