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Old 04-08-2020, 02:37 PM   #3
1998 Boxster Silver/Red
Join Date: Sep 2017
Location: 92262
Posts: 1,944
Time for a smoke test. Sounds like when you're driving... and the Rs are up... the vacuum issue is settled. You hit idle... it starts hunting for vacuum.

The general rule of thumb is to consider what last you were working upon, and before you attended to your list of fixs, and see if a line somewhere didn't break... or become detached.

Report back when you've solved the problem.

And, welcome to the forum!
1998 Porsche Boxster
1986 BMW 325es
2012 Ford Edge Sport

"Ignore the guilt, and take your turn"
Starter986 is offline   Reply With Quote