When removing gas cap after a drive I found the gas cap came off with quite some pressure.
I have renewed expansion tanks under cowl and in the front fender. Lines from the engine to the charcoal filter are clear when I blow air through them. I can blow air through the large charcoal filter tubes. The small charcoal filter tube does not blow air easily through it.
All clear lines from gas tank to expansion tanks are new. Anyone have a clue why the gas cap would come off with force?
My car is a 1971 911T running Weber carbs.
Thanks
John