Rough idle/no rev problem

[Gelbster]

Interesting.
If one vacuum lie is so brittle it cracked ,what about all the others if they are the same age & have endured the same heat cycling ?
Pelican sell a vacuum hose kit but I had wanted to find a set that are a better grade of plastic. In theory silicone may work for the small diameter hoses if you get a thick wall? It has a tendency to collapse under high vacuum when hot. So the cheapo EBAy ,thin wall silicone hoses would be a bad choice.
For smoke testing the vacuum system I recent;y upgraded to a better quality paint+can+baby+oil system.It works well because it pushes ut a lot of smoke for a long period consistently.
Thanks for letting us all follow your progress.

[tada]

Originally Posted by Gelbster

Interesting.
If one vacuum lie is so brittle it cracked ,what about all the others if they are the same age & have endured the same heat cycling ?
Pelican sell a vacuum hose kit but I had wanted to find a set that are a better grade of plastic. In theory silicone may work for the small diameter hoses if you get a thick wall? It has a tendency to collapse under high vacuum when hot. So the cheapo EBAy ,thin wall silicone hoses would be a bad choice.
For smoke testing the vacuum system I recent;y upgraded to a better quality paint+can+baby+oil system.It works well because it pushes ut a lot of smoke for a long period consistently.
Thanks for letting us all follow your progress.

I'll replace them all if I could find that kit. I've searched for hours for the part number of the rigid vacuum line I need that goes from the intake manifold to the fuel pressure regulator. Porsche Atlanta shows it on a diagram as part 16, and then does not list it. Pelican has rigid vacuum line sold by the meter that is listed as 4.0 x 1.0 mm. If anyone knows the part number, I would appreciate it. Otherwise off to my local Porsche dealer.