The problem with idle is solved!
 

Earlier I had problem with idle about 1.400 - 2.000 rpm, today I solved it!

It was the vaccumpipe to the brakesystem there was an leak on that pipe.

So when I plug the pipe my idle went down to 900 rpm.

But I still have a question this vaccumpipe does it go straight thru to the brakesystem or has it some other kind of function? The idle start to go a little rough after I plug the pipe.

/J

Dosen´t anybody nows about this pipe????

/J

I don't know about the '77 930, but the '78 has one power brake booseter vac line located on the lower middle left bank of the engine. The line comes off the intake and terminates at the brake booster in the trunk. The idle will increase if this line is removed or leaking. I assume brake function would be compromised.

Thank´s for that.
I guess the -77 930 has the same directions on the lines as the -78, so I take her for a drive today and see what happen.. "Pretty Exciting...."

/J