Quote:
Originally Posted by wwest
Using the manifold/gauges to test for Schrader valve leaks should/can only be done on side at a time anyway.
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That is a good point. If the low side schrader valve is a culprit, pulling from the high side can help isolate. Are those plastic caps supposed to seal as well? That could be a test. How long to lose vacuum with cap on vs off if schrader valve is leaking.