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Join Date: Oct 2009
Location: Windsor Ontario Canada
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Question 1986 Cabriolet hose diagrams

I have rebuilt the 3.2L engine in my 1986 911 Cabriolet. The engine is in the car and I am up to hooking up the emission and vacuum hoses. There are a couple hoses I can not see where they go, the large vacuum hose for the speed control and another hose, 3/8 diameter about 15 inches long with a few molded bends which is open on both ends. I cannot find a diagram for hose routing in the Bently service manual or the engine rebuild books. Is there anywhere I could get a diagram showing the hose routing?

Thanks
Roydog

Old 01-30-2021, 06:35 AM
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Location: Washington
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The engine lid should have the Vehicle Emission Control Information label. This is from my 87.



The following 86 PET Illustrations have the vacuum line routing.
107-00 L-Jetronic I
107-05 L-Jetronic II
107-10 L-Jetronic III
907-00 Cruise Control

For the cruise (speed) control, I believe the large hose vents to atmosphere and the smaller one connects to a "T" by the brake vacuum booster line. See Cruise Control Vacuum Line.

I think the other hose you are describing is 930-207-236-00 item 28 on Illustration 107-00. It runs between the throttle body and air valve.
Old 01-31-2021, 07:16 AM
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Thanks Harold

Old 01-31-2021, 02:56 PM
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