I just installed 55mm 300zxt TB in my 78 280z. Now, It's really slow getting up to 2000rpm (rich?) and after it's real smooth til 5500rpm. But right before 5500rpm it bogs. It feels like rev limiter!!!! (lean?) I plug the extra vucumn hose that plugged that used to plug up to the TB to the 300zx TB. I don't know if that's right. It may be the TPS. How do you check the 300zxt TPS? Anybody with experience with this setup?