Ok I just completed what was probably the largest amount of work I have ever done on any car much less the RX-7. I put a new set of Tein RA coilovers on the car, a Bonez Hi-Flow cat, and an alternator (it probably being the hardest of all). After I got done I took the car out for a shakedown run. I quickly found out the car had no secondary boost. It seems that the primary just seems to carry on and die out but no secondary kick. I know while working around the alternator I was in the vecinity of a lot of vacuum hoses but I don't think any of them came off or were loose after I finishied. I must be wrong here but where should be my first place to look. I have a Profec B Spec II for boost control so the solenoids are virtually useless as my mechanic while setting up the boost controller hooked both precontrol and secondary to the controller.

I plan on mostly tracking the car and I need to find this boost problem in the next couple of weeks as I have a couple of track days coming up. Any help would be appreciated.

 

why would you think it would be anything other than a vacuum hose that got knocked off somehow?

are you in denial?

 

Loose hoses, I agree. Pressure tank, vacuum tank, check valves, etc are all susceptible to breaking a nipple.

Dave

 

I was sure it was vacuum hose related, I just kinda felt like bragging about the rest. I was specifically wondering if you all had any specific hoses to look for so that my wild goose chase has a direction.

 

It's most likely something near the pressure tank (behind the alternator). Take a look there -- get out a vaccum diagram and check ALL the hoses within that area.