Hey guys, I am going through some problems with my 81SC CIS system. I was at an autocross last week and when the car got hot (second run) the car started to idle poorly while waiting in line for the next run. On the next run, as I let off the accelerator for the first turn, the car backfired badly. It stalled out and I restarted it and continued. It then did the same thing again. After much investigating, I found that one of the vacuum lines off of the deceleration valve is missing and it is sucking air through the tee joint where the line is missing. There is the main vacuum line from the decel valve that goes to a tee joint, where one side goes to a spot just next to the idle adjustment screw. The other end is the missing one, and I have no idea where it is needs to go. Can anyone tell me how long the line should be, and where goes from the tee joint?
Thanks in advance,
Paul
81 911SC/RS
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