I am positive the vacuum line connections are correct, and the Ultra-Power Turbocharger is a match for the original part. That being said I am attaching multiple pictures of the old turbo, the new turbo installed showing Vacuum lines connected. I may have a gasket leak which is causing the whistling sounds, but the whistling sounds increase when the fourth vacuum port is left open, and I have power loss. The original turbo also has a fourth vacuum port as shown in pictures and it was left open.
Tomorrow I am going to investigate the cause of the leak and will keep you informed.
I have added a picture of the Vacuum harness from the Service Manual and have also added a modified Vacuum harness picture which represents the Actual Connection Harness which may be helpful to you and the fellow members of the site.
Can you investigate what the fourth vacuum port is for as it would be much appreciated.
I was thinking an aftermarket Blow off valve (BOV) could be connected to this port.
This port has me baffled as I stated the original was left open.
Images (Click to make bigger)
Wednesday, August 10th, 2022 AT 3:50 PM