Engine stalls when oil tank cap removed.

[helgeseg]

I just finished installing a 3.2 motor in my 1977 911S. Now when I remove the oil tank cap to check the level in the tank, the engine stalls. The engine runs really well other than that. Any ideas?

Thanks,
Erik

[Steve Grosekemper]

There is a restrictor that goes into the oil tank at the breather fitting near the oil filler cap.

It is missing because a 77 doesn't have one. They started in 81.
The idle should drop slightly when the cap is removed but not die.
It looks like a tiny cone with a small hole in the end of the cone.
930.107.289.00

[helgeseg]

Steve,
Thanks. By the way, I've run into an intermittent coil failure twice now, once on this 3.2 motor and once on my SC a couple years ago. The intermittent nature of the problem made it a little difficult to diagnose. How common is this (or is it my 'electric personality' interfearing with the coil field)?

Thanks again,
Erik

[Steve Grosekemper]

Ah... let's just say it's not common...