dogder
Active member
I am troubleshooting my limp mode problem and trying to check all systems that could affect this problem. I checked the vacuum at the brake booster line and read around 28 inches. I also checked the vacuum coming off the N75 valve to the turbo. This reading was around 18 inches. Is this ok?? Not sure why there is a 10 inch drop. Most hoses are new and I've leak checked just about everything. I've heard the little check valve can cause problems. Anyone know how to check these?? Also how is it plumbed into the system?? (has white and black halves). Thank you