Bone stock '86 Turbo Z
Boost gauge has always topped out just over 7 psi
It sat outside during the brutal cold temps that we've had the last couple months. I got in to start it a couple days ago, and I had no brakes (never had a brake issue with it before). I pull it in (carefully, lol) the garage and determined that the master cylinder had died. So I put a new master cylinder on it, and decide to go ahead and put a new valve cover gasket on it too. Brake work goes silky smooth. With the valve cover off, I notice 3 busted vacuum lines (the hard plastic ones that are in a group of 4, run along the backside of the valve cover, and all go to the same vacuum fitting. I fix those and find no other issues. Valve cover back on, and all is good. On test drive, all seems great. Then I decide to lean on it a good bit, and as it was climbing, it cut out.....I think wtf, what was that? Drive it around town, runs perfect. On the long stretch country road headed home, I decide to see if I can duplicate the cut out. Come to stop, ease into it, then put the pedal 3/4 down in first, no issues and I see boost gauge climb to 8 at 5k shift (seem to feel faster than normal). 2nd gear, same 5k shift but boost gauge at 10 (feels faster still), 3rd gear, mash the pedal and the boost gauge burries, cut out....I slow down and then manipulate the throttle now that I know what I'm looking for (but did not push it to the cut out anymore). The car acts like I removed a governor and it will go full spool with full throttle, but I didn't mess with anything besides the 4 vacuum lines, the timing belt cover, and the master cylinder/bleed brakes.
Any thought?