I have a 180sx, Red top... clean and stock, besides some very minor part replacements. The car runs great except for one issue.
The issue is that if I start my car, (let if warm up a bit), and start driving (hardish) I can boost 10psi (according to my boost gauge), which I know is above normal boost. It also seems to shoot up there from 5psi very quick. Now, if I keep reving around 2k from starts and gear shifts the spike keeps occuring 90% of the time. Once I stop and pull off slowely I get a stumble and then the highest boost I get it 5-6psi.
The weirdest thing is if I am cruising, and do a rolling car start, aka turn it off for 5-10seconds, and back on the car runs like it did at start up.
This is well beyond my knowledge base, and would applicate any help you guys could give me. ITS IRRITATING when I get passed by a stock 90's civic!
p.s.) I have a boost controller I was preparing to install, but with this and aircare coming up I have been holding off.
Vacuum is perfect. Oil preasure seems to be what would be expected, except it shows 2psi after serious pushing. A/F (stoich) is perfect.