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vacuum gauge

  1. S

    Vacuum line through firewall

    Where's the best place to feed a vacuum line through the firewall? I've bought a mechanical vacuum gauge and need a feed from the engine to the gauge. Some youtube searches have shown the best place to tap in for the reading, but I haven't been able to find where I can feed it through into the...
  2. F

    Where to tee off for a vacuum gauge - Ecotec engine w/ gas

    I would've thought this question had been asked heaps of times, but forum and Google searches yield nothing. It's a series II VS, hence an ecotec, with a gas conversion. There's a bottle of "valve lube" (something to do with the lpg drying out valves i believe?) that has a drip system and has...