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patkeefe patkeefe is offline
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Join Date: Apr 2004
Location: Ringwood, NJ
Posts: 2,850
Pop off valve blow up

Spent the day getting the CIS sorted in the SC. My daughter and I took it for a test ride. At about 5000 in third at about 3/4 throttle, there was a very loud bang, sudden deceleration, and then it started running agin. Making no power, the boost gauge said 3 PSI, and the AFR was 18:1 or off the scale. So we pulled over. The old CIS popoff valve blew out of my plastic airbox.

Evidently 6 PSI boost is stronger than the epoxy the PO used on the popoff valve. I think I have some 8 PSI Devcon plastic epoxy in the basement.
Patrick E. Keefe
78 SC
01 Boxster
Old 09-02-2007, 04:16 PM
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