Hi, I have hks dragger exhaust system on my '94 RX 7. I went to e-check and they couldn't have the reading on the exhaust. Anybody knows why? I've never had anything like this when I used the stock exhaust. Please help !!!

 

I couldn't quite understand what your problem was (English, ************, do you speak it ), but whatever it was, it wasn't related to your HKS cat-back. Adding a cat-back exhaust has absolutely no effect on your emissions.

 

The tail pipe sniffer can't get a reading? that's odd.

A lot of older smog machines can't detect the right RPM. Maybe that's the problem your mechanic experienced.

Just try another shop that has a different smog machine. Sun smog machines usually work better than Allen smog machines. Just make sure that they don't charge you if they can't smog you.

 

are yoou sure there is no leak on your exhaust? Did you forget to plug the air pump back?