mkhargrove

I'm a beginner with my 928. I've restored a few other cars, including a 944 Turbo. In the past, I've fed air pressure into a vacuum system, sprayed the lines/connections with soapy water, and let the bubbles pinpoint leaks. I'm not sure if that's a common practice for a 928 ('84). Has anyone here used that method? If so, are there recommended locations to connect pressurized air (I don't even know yet where check valves are located in the vacuum lines)? Are there bladders that a prone to having a seal broken under positive pressure? What's the easiest way to seal off the intake side?

Guy

I use a smoke machine. Bought mine on ebay for 60 dollars. Best money I ever spent i kept my aircleaner in place and sealed the two outlets and the one breather hole. Nothing else worked for me with my 928. Ether, stethoscope, propane all a waste of time on my car.

I introduced the smoke using the front plenum block off bolt on a manual car. I replaced the bolt with a small fitting from my fuel pressure tester.