I've blown the secondary air pump fuse twice in the last week. The manual says that it is a 30 amp fuse, but some of the posts here on the forum say it is a 50 amp fuse. Am I using the wrong fuse, or do I need to check for another problem. Also the manual says that the fuse is between two red wires, on my 1997 Jetta 2.0l it is a red wire and a black wire.
Are you using 30 amp fuses or are you useing 50 amp fuses? Give the 50 amp a try. If that dosent work, if you can find where your SAIS pump air input is connected to your airbox you should disconnect it and start your car. Work your way back to the front of the car and listen to the input hose. You should hear a growling for about 65 seconds (on a cold start) and feel suction. This will verify that you have an operational combi-valve and it is not blocked up, which would overload the pump(maybe). The pump will work for 5 seconds after a 20 second delay on a "warm" start. If all that fails check out: