Are those tank grommets hard to change out? I'm pretty much sure it's those grommets and they're not expensive so I figure I should try it and see what happens before I start to buy more expensive replacement parts.

I hate doing the brake pumping (helper) method to bleed brakes but oh well, if that's the recommended procedure, I have no choice.

Do any of you guys think it could be the master cylinder? Or something more trivial?

Thanks so much for the help

Alex

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1983 300D (parked for four years)
2012 VW Sportwagen TDI Manual
2001 Miata SE
1962 Chevrolet Corvair Rampside