Intercooler boot

[mbagge01]

I just finished doing an intake pressure test on my 04 cayenne turbo and when spray some soapy water around the intercooler intake boots (tube connecting plastic intercooler tubes to plenum) and noticed some bubbling around certain parts on each boot which was consistent when I switch the tubes around. Visually the boot doesn't seem to have a major tear in it but there is some air getting through when I do this test. I am not getting any CEL's but I do get some issues with drivability under boost. Could I be getting air leaking out which is not large enough to cause a code but enough the cause air/fuel issues under WOT.

Martin

[hahnmgh63]

In short yes. You can have a fairly large Boost leak before the ECU will throw a CEL. A small Boost leak won't throw a code.

[voodoocat]

You should replace the gasket for intercooler pipe. Driver (left) side seem to have more issues. It is inexpensive.