IT'S VACUUM TO ME ALSO BUT THE TECH'S DO NOT CALL IT THAT ! TO ME THATS WHY ALL MECHANICS HAVE A VACUUM GAUGE !:rofl_200:
They call it "negative pressure," if that ain't a ridiculous term!
Very simple IMHO, some things suck, some things blow---if it sucks, it's vacuum! If it blows--well, that's a different story. :rofl_200:
dan