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With all the dropping and lifting the engine, I've managed to break the plastic fitting that comes off the vacuum pump and goes to the brake booster. Anyone have the part number for that?

On my way into work this morning, my brake pedal became very stiff, and was giving very little braking ability. When I was first braking, I was not having issues, and the hard pedal started about halfway through my drive. A bit of googling, and I suspect it is the brake booster or a worn vacuum line. I'll be hooking up to my star machine tonight to see if there are any hidden codes hinting at at what the actual problem is, but in the meantime, I was curious to know if there were any other possible causes for a stiff brake pedal that I might want to look out for? I had some brake work done in late August, including replacing the rear brake lines. My understanding is that if there was an airlock, my brake pedal would be squishy, so I've been sort of ruling that and water-logged brake fluid out. Some reference threads I found in my searching: -How the smart brake booster works -Where is the smart brake booster -Brake vacuum hose leak! Thoughts? Is there anything I can look for without putting the car up on a hoist?